Yokomo B-MAX2 MR/RS

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Old 01-05-2013, 03:03 AM
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Default Yokomo B-MAX2 MR, RS, V.2, V.3, FACTORY, WORLDS - YZ-2 buggies

***ATTENTION MIP Puck Drive System Users********************************************

MIP was suppose to have a STOCK pucks drive system for the bmax2's. But demand wasn't high enough for them to produce a kit. Now that the bmax2, and stock racing, has evolved quite considerably the demand for the MIP STOCK pucks is here.

Will 'WillS' has gotten in contact with MIP and he addressed this demand for the STOCK pucks directly to them.

http://www.rctech.net/forum/13792668-post2073.html

Quoting: "Just got off the phone with MIP. If we want a 17.5 puck system for the cars we need to send them an email to show interest. The email address is [email protected]. In the subject line make sure to address stock puck system as they already make a mod one. The more emails that are sent is the more likely we can get our stock puck system made."


In the meantime Will 'WillS' has provided some information in reducing weight on the heavy yokomo outdrives for stock racers. quoting: "I found a company that can turn our stock ball diff outdrives into lightened outdrives. Total weight of the 2 would be 17ish grams. I am looking at interest and have an email to find out how many sets to consider a run for him. This will help out us stock guys tremendously. Going to try and sneak in some wheeler ones to see if he will do them for when I go to stock nats."

If you would like more info on the machining for your outdrives contact Will directly here: WillS.

************************************************** ***********************************


"NEW" YZ-2 buggy #BYZ-2

Yokomo YZ-2 Order Sheet


Yokomo is introducing the all-new YZ-2, a state-of-the-art 1/10th-scale EP 2WD offroad competition mid-motor chassis kit, engineered from the ground-up for today’s racing environment and designed to deliver leading-edge developments to offroad enthusiasts, all while offering a luxurious feel by featuring black-anodized aluminum parts with chamfered edges for select components.

In recent days, offroad racing has seen a shift toward high-grip surfaces; use of astro, carpet and even high-grip dirt has become more and more prevalent. Last year’s World Championships was held on a dirt track where the surface was covered with sugar water to increase the grip.

With these developments in the offroad racing scene, the YZ-2 was designed from the ground-up to perform its best in today’s high-speed, high-grip race tracks.

By employing a super-low center-of-gravity motor mount and gearbox, the YZ-2 has realized an unprecedented weight balance never seen before in offroad racing cars, resulting in dramatically reduction of traction rolls on high-grip surfaces, and improved overall stability of the car.

An innovative steering design where the wiper swing action is directed toward the rear of the car affords a more direct steering response compared to conventional designs.

The hard-coated, low-friction anodized aluminum cylinders leads to smoother shock absorbing movements which allows better driving characteristics.

Also, quick alignment adjustments can be made without the need of optional parts by replacing the bushings of the front hub carrier and rear suspension mounts, a quality that can be an advantage in adapting quickly to various track conditions.

Everything about the Yokomo YZ-2 has been designed to provide an advantage for racers in today’s offroad racing scene.

Specifications
● Super-low center-of-gravity motor mount and gearbox
● Variable skid angles (0, 2.5, 5 degrees) by replacing the bushing of the front hub carrier
● Variable toe-in and skid angle by replacing bushings of the rear suspension arms
● Newly-designed aluminum steering rack
● Aluminum rear suspension mount
● Aluminum front upper arm mount
● Aluminum front suspension arm mount support
● One-piece aluminum main chassis
● Support for both stick and shorty LiPo batteries
● Carbon graphite battery plate
● Dual-pad slipper clutch
● Aluminum front and rear hex wheel hubs
● 4mm-thick carbon graphite front and rear shock towers
● Low-friction, hard-anodized shock cylinders
● Newly-designed forward-cabin racing body












"NEW" B-MAX2 MR Version 3 FACTORY #B-MAX2MR3F

Included option parts:

• Titanium turnbuckles
• Aluminum steering bell cranks
• Titanium coated shock shafts
• 'X' Shock Pistons (Black 1.6mm/2 hole)
• Aluminum front lower suspension mount
• Aluminum front upper arm mount
• Front and rear hex hubs
• Aluminum Rear Hub Carriers (0° Toe-in)

Yokomo B-MAX2 MR V.3 FACTORY order sheet
















B-MAX2 MR Version 3 #B-MAX2MR3


(Translated via google)
B-MAX2 MR popular model change! Standard with the new aluminum main chassis, which is integrated to the front skid plate and show the driving characteristics of good response to weapon the height of the stiffness. In response to artificial turf carpet road surface and it is growing these days in particular, it will acquire advantage in running a high-grip road surface that will become mainstream in the future. In addition, to prevent the blurring of the shock shaft by shock bottom cap is also changed, mounting the new plastic shaft guide, reduce air contamination of the cylinder, we extend the maintenance cycle and stability of shock absorption.



B-MAX2 MR Version 2 WORLDS Limited Edition #B-MAX2MRW

Rest of the story on the WORLDS and FACTORY editions via REDRC...

http://www.redrc.net/2013/11/yokomo-...ts/#more-74320

This is the Yokomo B-MAX2 MR V2 World Spec Limited Edition 1/10 2WD Competition Electric Buggy Kit. This limited edition version of the B-MAX2 MR V2 includes the parts used by Naoto Matsukura at the 2013 IFMAR World Championship's in Chico. The kit was developed especially for high traction surfaces such as high grip clay, astro turf and carpet tracks.

This World Spec kit is based on the B-Max2 MR Ver.2, but includes a 1-piece all-aluminum chassis plate with integrated front kick-up, rather than the standard 2-piece aluminum and plastic part. Additionally, the World Spec kit includes an aluminum steering bell crank set, aluminum front lower suspension mount and narrow aluminum front upper arm mount, Ver.II "X" aluminum shock caps, Ver.II "X" titanium coated shock shafts, and titanium turnbuckles to round out this incredible limited edition package.

Included option parts:

• Aluminum WORLDS 1-piece chassis
• Aluminum steering bell cranks
• Aluminum front lower suspension mount(STANDARD)
• Aluminum front upper arm mount(NARROW)
• "X" Ver. II shock shafts(TITANIUM COATED)
• "X" Ver. II shock Aluminum caps
• Gear differential w/high rigidity steel diff bevel gears
• Titanium turnbuckles



B-MAX2 MR Version 2 FACTORY Limited Edition #B-MAX2MRF





B-MAX2 MR Version 2 #B-MAX2MR2


Yokomo's flagship B-MAX2 2WD buggy line has evolved once again with this latest V.2 buggy. Continuing with the best upgrades and geometry from the previous car, the V.2 adds an aluminum main chassis to keep a low center-of-gravity, aluminum idler gears lowering rotational mass in the transmission, and a steel beveled-gear differential for endless tunability and high performance with big power brushless motors. With all these improvements the B-MAX2 MR V2 will provide great performance, cornering and efficiency on high traction surfaces.

Features:

• Toe-in 3°, 3.5°, 4° (adjustable)
• High Rigidity Aluminum Main Chassis (select between mid & rear motor)
• Aluminum Rear Suspension Mount
• Dual-pad Slipper Clutch
• High-precision Aluminum Idler Gears (× 2)
• High Rigidity Steel Diff
• Big Bore "X" type II shocks
• Aluminum Front Brace
• Hard Anodized Aluminum Shock Cap Balls & Shock End Balls
• "C-Clip" Universal Shafts
• Full Ball Bearings
• Cab-forward Body



B-MAX2 MR and RS buggies





Yokomo B-MAX2 MR #B-MAX2MR

This is the Yokomo B-MAX2 MR 1/10 Scale 2WD Competition Electric Buggy Kit. After a successful 2011 and 2012 race season, Yokomo gives us the latest evolution of the B-MAX2 buggy now equipped with the ability to run a rear or mid-motor configuration. While the traditional three gear rear-motor transmission is better suited for dirt off-road surfaces, the four gear mid-motor configuration has shown to improve corning speed and drivability on high grip surfaces like carpet and turf.

The B-MAX2 MR also features a redesigned molded chassis developed for modern LiPo batteries, brushless motors and the dual motor configuration. The chassis is long for stability while remaining slim keeping weight in the center line. In the front end, the B-MAX2 MR has been engineered with the ability to run a wide or slim track to suit nearly any condition, with the necessary parts included in the kit. On all four corners, Big Bore "X" shocks cushion the jumps while ball bearings and tungsten differential balls ensure a smooth drivetrain.

Features:

• Redesigned ball differential with tungsten balls
• Big Bore "X" shocks Type II
• Hard anodized shock cap balls & shock end balls
• Redesigned molded chassis (mid motor and rear motor)
• Redesigned Aluminum Rear Suspension Mount (Toe-in 3°, 3.5° & 4°)
• Cab forward body
• Steel Turnbuckles
• Double-pad slipper clutch
• Front Aluminum brace
• "C-clip" universal shafts
• Full ball bearings
• Off-road paradise wings
• Pinion gear and wheels included

Specifications:

• Length: 380mm
• Overall Width: 248mm
• Wheelbase: 282mm
• Reduction Ratio: 2.6:1
• Working Weight: ~1,600 grams



Yokomo B-MAX2 RS #B-MAX2RS

Introducing the B-MAX2 RS, a basic rear-motor version kit based on the championship winning B-MAX2. A newly designed gear box utilizes a 4-bevel gear differential that allows the diff to last longer, and also reduce maintenance. The hardness of the diff can be adjusted by changing the oil inside, to match the surface conditions. An optionally available 4-gear transmission allows a mid-ship configuration to be used. Reasonably priced yet maintaining high performance, this new kit is perfect for any enthusiast just getting into off-road. A wide variety of optional parts are also available for those ready for upgrades.

Features:

• Newly developed gear box(3-gear rear-motor specific)
• Newly designed gear differential (oil)
• Molded composite oil dampers
• Newly designed molded main chassis (mid motor and rear motor)
• Newly designed aluminum rear suspension mount (toe-in 3°,3.5°,4°)
• New cab-forward type body shell
• Steel turnbuckles
• Double pad slipper clutch
• Aluminum front brace
• “C-clip” universal shafts
• Full ball bearings
• Gokuraku off-road wings
• Pinion gear and wheels included (no tires)



B-MAX2 MR conversion kit for the first generation 2012 B-MAX2 (V.1) #B-MAX2MCV


Designed for the 2012 Japanese Nationals winning B-MAX2 rear-motor 2wd buggy, this conversion kit will provide both mid- and rear-motor options. The mid-motor configuration is desirable on high grip surfaces such as carpet and artificial grass (which are both becoming increasingly popular around the World), as it provides much improved handling on these types of surfaces. Of course, on lower grip dirt surfaces, the traditional rear-motor configuration provides better rear grip needed for these conditions. The addition of the newly developed cab-forward body shell helps achieve an optimum balance of stability and high cornering performance.

Included conversion parts:

● Cab-forward body shell
● Main chassis
● Mid-motor 4-gear transmission case
● Rear-motor 3-gear transmission case
● MR diff outdrives(L/R)
● Rear shock tower
● Shock tower mount
● Battery holder
● Chassis brace
● Rear brace
● Rear shock spring (blue)
● Wing mount
● Aluminum rear suspension mounts(F/R)
● Counter gears, shafts, etc.


Last edited by littlevette; 01-22-2015 at 08:56 PM.
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Old 01-05-2013, 03:04 AM
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Default Optional parts

JConcepts Illuzion Finnisher body w/ (2) 6.5" Hi-Clearance wings for the B-MAX2 Part #0236



JConcepts Silencer body w/ (2) 6.5" Hi-Clearance wings for the B-MAX2 MR Part #0242



BFAST Diff Rings, Thrust Washers, Carbide/Ceramic Balls, and Kits



(2) diff rings Part#R02

"Driver's Kit" (2 diff rings and 12 CARBIDE diff balls) Part #DR02

"Pro Driver's Kit" (2 diff rings, 12 CARBIDE diff balls, 2 treated thrust washers, and 8 CARBIDE thrust balls) Part #P02

"Pro Driver's Kit" (2 diff rings, 12 CARBIDE diff balls, 2 treated thrust washers, and 8 CERAMIC thrust balls) Part #P02-C

Thrust Sets:
(2 treated thrust washers and 8 CARBIDE thrust balls) Part #TB26
(2 treated thrust washers and 8 CERAMIC thrust balls) Part #CTB26

Diff Balls:
(12) 3/32" CARBIDE diff balls Part #DB12
(12) 3/32" CERAMIC diff balls Part #DB12-C

CREAM Extreme RC

Brass front lower suspension mount (STANDARD) 40 grams




Brass front brace (STANDARD) 8 grams




Mounted to the 40g brass front lower suspension mount


photos: Cream Extreme RC

New parts for the MR/RS. Release date set for August 2013:

New prototype parts modeled on MR buggy:



Yokomo Option Parts:

Aluminum main chassis #B2-002MRA



Graphite battery holder for the MR/RS in rear motor configuration #B2-118RA




Graphite battery holder for MR/RS mid motor configuration #B2-118MA



Aluminum steering bell cranks #B2-201BA



Front lower suspension mount #B2-300FLA



Yokomo Europe BRASS 11g Weight for the new #B2-300FLA aluminum front lower suspension mount. #B2-300FLAW



Front upper arm mount #B2-300FUA



PLASTIC GEAR differential unit for MR/RS (assembled) #B2-500GS



STEEL bevel gears for gear differential#B2-503GM



Aluminum idler gear #B2-503IA



Aluminum ‘X’ shock caps #B2-S812A



Yokomo Europe BRASS 50g front lower suspension mount (STANDARD) #B2-300FLB



"Associated" 3/16" front axles (use 3/16" x 3/8" unflanged bearings) #B2-010FI



B-MAX2 MR/RS titanium turnbuckle kit #B2-TBS



Aluminum rear hub carriers 0° (NEW DESIGN) #B4-415R00



Aluminum rear hub carriers 0.5° toe-in (NEW DESIGN) #B4-415R05



Aluminum rear hub carriers 1.0° toe-in (NEW DESIGN) #B4-415R10



METAL GEAR differential unit for MR/RS (assembled) #B2-500MGS




MR mid motor tranny case "HARD" #B2-302MRH



MR/RS rear shock tower & rear upper mount "HARD" #B2-018MRH



Front suspension arms "MEDIUM" #B2-008FM



Rear suspension arms "MEDIUM" #B2-008RM



Yokomo Europe BRASS 25g rear suspension mount (REAR SIDE) #B2-300MRRB



Aluminum WORLDS one piece chassis #B2-002MRW



Yokomo Europe BRASS 17g rear suspension mount (FRONT SIDE) #B2-300MRFB
photo shows it mounted on rene traa's bmax2.



photo: rene traa

REAR lower suspension arms #BM-008R
(some modding to the arms will have to be done)



Front hex hub conversion kit #B2-HCOV
Modeled, and included, on current buggy model B-MAX2 MR V.3




UPDATED Shock bottom caps and collars for V.2 shocks #B2-S4B1
(to reduce sucking in air, shock shaft movement, and maintenance)



STEEL 45.8g front lower suspension mount (STANDARD) #B2-300FLS



GRAPHITE idler shafts (2) #B2-303IG



ALUMINUM top shaft #B2-303TA
(remember to get the #B2-503 NYLON idler gear when using this ALLOY top shaft)



ALUMINUM LITE WEIGHT motor mount plate #B2-304LW
(lower center of gravity)



Rear hex hub adapters #B2-011R
Modeled, and included, on current buggy model B-MAX2 MR V.3
(no need to get rid of the blue wheel spacer anymore)




25g battery tray weights (2 pieces) #YT-RW25



B-MAX2 MR/RS LITE WEIGHT clear lexan body #B2-101MRL





Team Azarashi



You could buy factory direct from Team Azarashi. Just contact them @ [email protected] (japanese and english speaking only)
Their english online store: http://www.team-azarashi.com/prodenglish.html
Team Azarashi's ebay store: http://stores.ebay.com/Team-AZARASHI

B-MAX2 tranny riser kit #AZ-0037



The "Erithus" B-MAX2 MR/RS body (part #AZ-0038). the body will fit both Mid Motor and Rear Motor configurations. more pictures of the ERITHUS body on MR and RS buggies. also, more pictures of sylvain's body here...

"Erithus" body includes window mask and velcro. along with mounting instructions.





photos: team azarashi and sylvain gallo-selva

RED WORKSHOP



B-MAX2 MR graphite chassis



photos: red workshop, arnaud ledun

DRK Reinforced Chassis:

The DRK reinforced chassis is designed to add stiffness and weight in order to obtain a super low center of gravity and less roll on high grip surface tracks.

This chassis is a laser cut stainless steel piece you can request in two thicknesses, 1mm or 1.5mm. It weighs approximately 100 grams depending on thickness.


photos: "dr. kamakura", petitrc

RCCSS (Authorized Yokomo dealer for the Netherlands)

BMAX2 MR carbon fiber chassis:




Front BMAX2 MR carbon fiber shock towers:




Rear BMAX2 MR carbon fiber shock tower:


photos: RCCSS

RDRP(Revolution Design Racing Products)30 gram and 60 gram motor weights

"The RDRP Ultra Motor Weight 30/60g is designed for hassle-free chassis weight distribution changes.

With the enormous power current brushless motors and LiPo batteries offer it is often recommended to add additional weight especially on bumpy or low traction tracks.

To do away with unsightly wheel balance weights that are often used and that can be thrown out of the car in the event of a crash and to add weight where your chassis needs it, the RDRP Ultra Motor Weight is inserted between the motor and the motor holder. Especially in 2WD buggies and 4WD touring cars the motor is often located near the roll centre and this is the perfect place for added weight.

Coming CNC-machined from high-quality steel and sporting a black anodising the 30g plate is 4mm thick and the 60g plate is 8mm thick."



photos: rdrp and rccss

Avid RC

Triad kyosho aluminum topshaft part #AV1020-TOP-KYO



Triad slipper clutch kits(mod and stock):

Slipper clutch MOD 81/84 spur gears part #AV1020-MOD
Slipper clutch STOCK 72/76 spur gears part #AV1020-STK



Triad spur gears 66-87t 48p:

Triad spur 66t part #AV1020-66
Triad spur 69t part #AV1020-69
Triad spur 72t part #AV1020-72
Triad spur 75t part #AV1020-75
Triad spur 76t part #AV1020-76
Triad spur 78t part #AV1020-78
Triad spur 81t part #AV1020-81



Caged diff thrust bearings (2.6mm diff bolts, 6mm diff thrust washers):

yokomo/kyosho diff thrust bearing STEEL part # F2.6-6G
yokomo/kyosho diff thrust bearing CARBIDE part #F2.6-6G/TC
yokomo/kyosho diff thrust bearing CERAMIC part #F2.6-6G/C



MIP

***ATTENTION****

MIP was suppose to have a STOCK pucks drive system for the bmax2's. But demand wasn't high enough for them to produce a kit. Now that the bmax2, and stock racing, has evolved quite considerably. the demand for the MIP STOCK pucks is here.

Will 'WillS' has gotten in contact with MIP and he addressed this demand for the STOCK pucks directly to them.

http://www.rctech.net/forum/13792668-post2073.html

Quoting: "Just got off the phone with MIP. If we want a 17.5 puck system for the cars we need to send them an email to show interest. The email address is [email protected]. In the subject line make sure to address stock puck system as they already make a mod one. The more emails that are sent is the more likely we can get our stock puck system made."


In the meantime Will 'WillS' has provided some information in reducing weight on the heavy yokomo outdrives for stock racers. quoting: "I found a company that can turn our stock ball diff outdrives into lightened outdrives. Total weight of the 2 would be 17ish grams. I am looking at interest and have an email to find out how many sets to consider a run for him. This will help out us stock guys tremendously. Going to try and sneak in some wheeler ones to see if he will do them for when I go to stock nats."

If you would like more info on the machining for your outdrives contact Will directly here: WillS.


MOD Pucks™, Shiny Drive System for the Yokomo B-Max2 MR Part #14145

For parts and support:

http://miponline.com/store/mip14145.html

Via MIP:

"MIP would like to introduce the drive system of the future, for all Mod 2wd vehicles;!!!! MOD PUCK SYSTEMS These systems are are steel construction keeping to, relatively the same overall weight that you are used to with your steel OEM bones; but giving you the Added Benefit of MIP pucks That Are fully serviceable. No longer Will Outdrives diff and CV Bones Wear Simultaneously, with the system all Puck That IS IS needed to Easily Change pucks WHEN Necessary and the drivetrain Stays Tighter, fresh, longer. Added Benefit This equates to less Money, less time off the track for Rebuilds, and Keeps your Vehicle more competitive. The first release of this product IS for the Schumacher line of 2WD Buggies INCLUDING the KR and SV2. Part # 14100 There Will BE Mod and many more Stock Puck Systems to come for the vehicles Like: Team Associated B5, B4.2/.1, SC10.2, T4.2 / 1 2.0 TLR 22, SCT 22, 22T Kyosho RB6 , RB5, SCR, RT6, RT5 Xfactory Serpent Hobby Pro Yokomo Durango Team-C"



PSM

one piece 2.5mm B-MAX2 MR main chassis for OUTDOOR racers. Part #PS01632

http://www.psm-rc.com/ps01632/

Product features:

● Total weight saving = 50.0g (compared to the original aluminium chassis)
● Ultra Lightweight – at only 63.5g
● Machined by – PSM in Germany
● 2.5mm Premium – Glossy Carbon Fiber
● Designed for – Outdoor use
● Direct Replacement – with use of original Parts

This carbon main chassis was designed to fit Team Yokomo’s BMAX2 MR. It reduces the overall weight for 50.0g and adds more overall flex characteristics, that gives you an advantage when it comes to low traction track conditions.The parts will be replaced with this Product.

Designed for Outdoor use.

Required for completion: Yokomo #B2-002SP (1x) and Yokomo #B2-002F (1)

Building Time: approx. 10 Minutes




Official release via redrc.com:

"Made for the 2WD B-Max2 is the 4mm carbon fibre front shock tower. CNC-machined from glossy finish material the part weights in at 4.5g and it comes including two 7075 2mm aluminium spacers."



Arrowmax

Brass front bulkheads for the B-MAX2 MR. For HIGH-GRIP surfaces.

52 gram front bulkhead in WIDE



44 gram front bulkhead in NARROW


Last edited by littlevette; 01-22-2015 at 08:43 PM.
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Old 01-05-2013, 03:04 AM
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Default B-MAX2 V.1/MR/RS Manuals, supplements, setup sheets, and events

Manuals, setup sheets, parts lists, etc.:

Petitrc's B-MAX2 V.1/MR/RS pages. Lots of setup sheets, mods, and tips. Put together by the great arn0:
Petitrc's B-MAX2 V.1 page
Petitrc's B-MAX2 MR/RS page

Manuals:
B-MAX2 V.1 manual
B-MAX2 MR manual:
B-MAX2 RS manual:

Supplement sheets:

B-MAX2 MR V.2 Supplement for the alloy chassis and gear diff

Blank setup sheets:

B-MAX2 V.1 blank setup sheet
B-MAX2 MR blank setup sheet (NEW as of Oct/2014)
B-MAX2 MR blank setup sheet via arnO @ petit rc. this setup sheet is highly modified from the standard yokomo mr setup sheet for additional optional parts, circuits(tracks), and much more suspension tuning.(Updated as of Oct/2013)


Parts List:
B-MAX2 V.1
B-MAX2 MR/RS
B-MAX2 MR V.2/V.3

Yokomo B-MAX2 V.1/MR/RS Exploded Views:
B-MAX2 V.1 Exploded View
B-MAX2 MR/RS chassis. Including new RS shocks
B-MAX2 MR/RS mid and rear motor transmissions. Including new RS gear diff

Arn0's (via PetitRC) big bore and small bore springs/pistons/oils charts:
Universal spring/piston/oil charts

Events:

EOS Round 2 Germany:
Arnaud's (aka. arn0 via petitrc) awesome page on naoto's MR during the EOS round 2 GERMANY event. LOTS of close up pictures, videos, and naoto's setup sheet for the event. thanks arnaud!

REDRC's excellent coverage and photos of the EOS Round 2 GERMANY event:
(Event info and coverage)
(Photo's of the event)

OOPLE's awesome coverage of the EOS Round 2 GERMANY event.

2013 Cactus Classic:
Matsukura TQs second 2WD Buggy Qualifier


2013 IFMAR PRE-WORLDS/WORLDS:
2013 IFMAR 1/10 Offroad Worlds Chico, California

REDRC coverage including video

2013.11.2-3 Asian Off-Road Championships @ Yatabe Arena:
Neobuggy's AOC coverage and pictures

Under the hood of 2wd winner Masatsugu Ido's bmax2 MR. via neobuggy.net

Last edited by littlevette; 10-27-2014 at 08:00 PM.
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Old 01-05-2013, 03:06 AM
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Default BMAX2 V.1/MR/RS tips, tricks, and mods

Known Problems or Defects: BMAX2 V.1 STILL UNDER CONSTRUCTION...

These following problems were part of the first generation BMAX2 V.1's.

Early bmax2 v.1 kits came with weak and brittle tranny outdrives. if you purchased an early V.1 kit with the defected outdrives get in contact with the company where you purchased your bmax2 V.1. they will provide you with new updated outdrives at no charge. yokomo did recognize this problem and made note of it on their site. later bmax2 kits came with the new updated outdrives with a supplement stating the fix.


photo credit: fullsyzz

Brittle e-clips for the shock shafts. Often breaking on hard landings. later kits provide a supplement and new updated e-clips for the fix.


photo: alana07

Thick anodizing on thrust bolts. Making it impossible to slip on thrust washers. Sanding the thrust bolt with a piece of sandpaper fixed the problem.

Known Problems or Defects: BMAX2 MR/RS:

These following problems were part of the BMAX2 MR/RS buggies.

MR rear suspension mount t-plates have been known to crack under hard landings or not so hard landings. It is still not known if this is a bad batch of t-plates, or if people are tightening their screws a little too hard in this area.


photo credit: tony2

Tips, Tricks, and Mods: STILL UNDER CONSTRUCTION...

The cheapest mod you could do to your bmax2 is to replace your front stock metric axles, and replace them with the yokomo "associated" 3/16" axles (part #B2-010FI). you will also need four 3/16" x 3/8" unflanged bearings ($1 ea. at avid rc). with this mod you could use team associated/proline/jconcepts/de racing b4 front wheels. wheels will now be cheaper and easier to find.



Raising the tranny with spacers or a kit from team azarashi. You could also use 1mm, 1.5mm, 2mm yokomo spacers to achieve this as well. Raising the tranny Improves forward bite. TLR has a very similar mod for their 22's.



a great tip from 'MarkA' regarding the heavier stock idler shafts: "Speaking of weights, I was looking at some of my old leftover Tamiya TRF201 stuff and realized that these fairly cheap lightweight idler shafts fit perfectly in our gearboxes replacing the stock solid steel ones. It takes two of those to register 1g on my scale, two stock ones are coming in at 4.5g so a couple bucks removes a couple grams up high in the gearbox."

tamiya part #54344



Team associated's gear diff part #9827 (b4/t4/sc10) will fit the bmax2 tranny. You will also need to get a set of 10mm shims (from either yokomo, tamiya, or kyosho) in various thicknesses to fix the side to side play. Use an equal amount of shims on both sides to keep the gear diff centered within the tranny. remember to replace your old idler gear with a new one when changing over to a new gear diff or ball diff gear.

Once i get confirmation of other ball diffs or gear diffs that could fit the bmax2 i'll post them up. Shoot me a pm if you would like to contribute.

Great tip from 'MarkA' about temporarily replacing his worn out yokomo gear diff, and replacing it with an associated (part #9827) gear diff. also proper shimming of associated gear diff within the bmax2 tranny.

Via 'MarkA':
"My beloved Yoko gear diff actually wore out (the plastic diff gear did and Amain was out) so I bought the AE one to get back on track as the ball diff wasn't agreeing with my track/driving style/setup. It does fit and to add a starting point for spacing it into the Yoko gearbox, I used 5 of the 10.0×0.20mm shims on each side to get it "close enough." It also takes several runs to "break-in" and get the internal gears meshing correctly as opposed to the Yoko one where they're just machined correctly but in a pinch, it's serving it's purpose."



Avid rc aluminum kyosho top shaft and triad slipper clutch installation via petitrc...



Team associated VTS slipper clutch install....



Team associated clear gear cover installation... UNDER CONSTRUCTION....



12mm REAR hex adapter wheel conversion. great tip from 'mes'. Following parts are needed: yokomo #BM-011S rear wheel spacers, and jconcepts #JCI2091 12mm rear hex adapters. Remove the roll pin and remove the blue stock wheel spacer. Add the yokomo #BM-011S wheel spacer and replace your roll pin back into the axle. Place the 12mm Jconcepts #JCI2091 rear hex adapters over the axle and over the roll pin. Place a dab of blue thread locker onto the head bolt and tighten down snug into the hex adapter. Repeat on the other axle. you could also use proline or associated 12mm hex adapters.

Another VERY SIMPLE 12mm REAR hex mod is to use a team associated, jconcepts, or proline FRONT 12mm b4 hex adapters. you could mount the hex in the rear with no modification or removal of the blue wheel spacer or roll pin. just slide on the associated 12mm front hex adapter over your axle and roll pin, lock down, and you're good to go. (source: 'mekios')



Hot Bodies 12mm REAR wheel hex adapter mod. great tip from 'julius_makewar': "I have used the HB pin and not the Yokomo roll pin. The HB Hex has a .75mm or thereabouts, step on the inside face (possibly designed to run against the inner race on HB cars) which is flush against the Yokomo axle spacer. The pin is not fully bottomed out in the Hex groove but it is completely covered by the hex and should be well enough engaged and secure to not cause an issue. I have used these hexes on my Tamiya TRF201 in a similar way for some time with no ill effect. ... There is 1mm of thread protruding past the wheel nut." MORE INSTALL PICTURES



photos and tip: 'julius_makewar'

Team durango REAR 14mm hex wheel conversion. CONFIRMING PARTS AND WHEELS...


photo: 'RichyUK' @ oople

Front hex conversion mod #1 via 'froggie22'. parts used: associated. this setup does have its own issues. use this modification at your own discretion. MORE PICTURES, and INSTALLATION


photos and tip: 'froggie22'

Front hex conversion mod #2 via 'mhuse6969'. parts used: kyosho and yokomo. quoting michael: "I used kyosho hexes with the SCR hubs and it worked fine. Email me if you want pics and part numbers." i still have not gotten a response on fitment, parts, or any issues with this setup. once i do i'll post it up. PART NUMBERS USED


photo and tip: 'mhuse6969'

Team associated B5 front carrier/steering arm/hex conversion. more info will be available as soon as testing is done via 'Racing4Evo'.
more info on conversion:

http://www.rctech.net/forum/13046471-post1316.html
http://www.rctech.net/forum/13053726-post1324.html



3racing cactus front hex conversion via 'nepiman'. parts and mods are outlined in link. i'll update it as soon as pictures come in.

http://www.rctech.net/forum/13145845-post1511.html

Yokomo front hex hub conversion kit now available. part #B2-HCOV. new yokomo hex hub wheels in white and yellow are also available. white hex wheels part #B2-821HW, yellow hex wheels part #B2-821HY.



Removing side to side play on your front wheels. adding a 8x10mm shim (from yokomo, kyosho, tamiya or calandra) within the wheel, before mounting your bearing, will eliminate your play.



Build your own custom rear anti roll bar for your MR. via 'my yokomo'.

http://www.my-yokomo.fr/rear-anti-ro...b_source=pubv1



Great tip from 'janus_77' for modding your shock bottom caps and adding the appropriate collars and shims. this will further reduce shock shaft movement and bleeding issues. which in the long run will reduce shock rebuilds. yokomo has taken notice of this issue and has released their new revised shock bottom caps and collars for the "X" type Version II shocks. part # B2-S4B1.

More info and notes to take into consideration concerning the shock bottom cap mod via 'janus_77', 'skrichter', 'juddy12', and 'jamie hanson'. it all starts on pages 62, 63, and 64. and it continues with these following posts:

http://www.rctech.net/forum/12889172-post1026.html
http://www.rctech.net/forum/12889924-post1028.html
http://www.rctech.net/forum/12918662-post1106.html
http://www.rctech.net/forum/12919015-post1107.html
http://www.rctech.net/forum/12919941-post1110.html
http://www.rctech.net/forum/12920539-post1115.html
http://www.rctech.net/forum/12923211-post1120.html


photo and mod via 'janus_77'

Team associated battery foam liner for MR/RS battery trays. Great tip from 'Racing4Evo':
"... I found a perfect size foam liner for the battery tray. Less than $2. team associated part #91186. It fits perfect and is the perfect thickness."



mounted


photos and tip: 'Racing4Evo'

YZ-2 / B-MAX2 MR Cross Fitting Parts:

Great tip from 'WillS' quoting:

"For everyones information books... YZ-2 front pieces fit the Bmax2 and make it the same width as stock. This will allow for 25/27/30 caster, spindle height and options of flat/gullwings [arms]. There is also no need to for a bump spacer and it provides more ackerman for low speed steering."

http://www.rctech.net/forum/13795176-post2080.html
http://www.rctech.net/forum/13798343-post2098.html
http://www.rctech.net/forum/13798708-post2102.html
http://www.rctech.net/forum/13798916-post2105.html

Parts needed:

1- YOKZ2-008FG
2- YOKZ2-415SA
1- YOKZ2-414
1- YOKZ2-413
1- YOKZ2-415S

If you have 3x8mm and 3x12mm button screws you will not need these parts to bolt it all up.
1- PTK-H-3202
1- PTK-H-3204

When asked what this cross fitting will do... quoting 'WillS':

"Does quite a few things that will benefit the car.
Different caster, where as before we were stuck to 25/5, we can now go as low as 25/0.
Spindle height to play with front end weight.
Ackerman, With the v3 I felt there was always too much. This will allow for more low speed steering in which I felt the car lacked for the speeds of prostock.
Tuning option of Flat or Gullwing [arm]. Shock towers are in the works."

Quoting Markus 'Mes' :

"... If I understood the YZ-2 manual correctly going as low as 25/-5 should be possible, which might be good on high-bite tracks."

'WillS' response:

"Yup, and I saw Naoto use 0 degree blocks a lot. I am starting there and hoping it makes the car have a ton of steering. If this happens, I think this will make it the B5m killer. I like the YZ-2 but I think this car has a greater potential to being the car for all surfaces."




Weights to take into consideration:

Front lower suspension mounts (Plastic, Alloy, Brass) Via 'ReneT':

"Plastic = 8g
Alu[alloy] = 12g, alu[alloy]+11 = 23g
brass = 50g, No extra weight option in the brass mount.
There's also one made by Cream in the UK that is 40g. You can add weight in that one"

Weight differences between plastic and alloy front end parts Via 'MarkA':




Differentials (Ball and Gear) Via 'MarkA'. Note: Gear diff with metal gears. not plastic gears.





Other front and rear wheels that could be used on the bmax2: STILL UNDER CONSTRUCTION...

Rear pin drive wheels:
Proline velocity b4 wheels
Jconcepts rulux b4 wheels
Team associated b4 wheels
DE racing borrego b4/tlr 22 wheels

Rear hex drive wheels(12mm):
Yokomo bmax2/bmax4 wheels #b4-827(yellow), #b4-827w(white)
TLR 22 hex wheels
DE racing borrego tlr 22/b4 wheels
Avid rc satellite tlr 22/rb5/b4
Team associated b4.1/b44.1 wheels
Jconcepts mono b4.2/rb6/tlr 22 wheels
Proline velocity b4.2/rb6/tlr 22 wheels
AKA hexlite b4.2/rb6/tlr 22 wheels

Rear hex drive wheels (14mm):
Durango 14mm rear dex410 wheels
DE racing 14mm rear dex410 wheels

Front STANDARD (not metric) bearing wheels (NEED yokomo part #B2-010FI "associated" 3/16" axles, and (4) 3/16" x 3/8" bearings):
Proline velocity b4 wheels
Jconcepts rulux b4 wheels
Team associated b4 wheels
DE racing borrego b4 wheels

Front hex drive wheels (12mm):
Yokomo bmax2 wheels #b2-821hw(white), #b2-821hy(yellow)

Front hex drive wheels (14mm):


Cross reference of other similar parts that fit the bmax2: STILL UNDER CONSTRUCTION...

Wheel hex drive adapters (front and rear):
Proline (12mm) front and rear
Jconcepts (12mm) front and rear
Team durango (14mm) rear
Team associated (12mm) front and rear
Hot Bodies (12mm) rear

Hub carriers (front and rear):

Front spindles (knuckles):

Ball cups:

Non servo saver servo horns:

Top shafts and Slipper clutches:
Team associated VTS slipper clutch part #91175 (outer vts hub needs modification)
Avid rc kyosho aluminum top shaft part #av1020
Avid rc triad slipper clutch (mod and stock)
Avid rc triad spur gears

Thrust washers:
Kyosho part #BRG100 thrust washers
Casper's caged thrust kit for the "kyoshos"
B-fast kyosho hardened and flattened thrust washers
Avid rc yokomo/kyosho caged diff thrust bearings (steel, carbide, ceramic)

Spur gears:
All kimbrough and team associated b4/t4 spur gears
Team associated slipper pads part #9603

Gear covers:
Team associated part #7461 clear gear cover (pictures and instructions coming)

Shocks:
Team associated front big bore shock kit part #91314
Team associated rear big bore shock kit part #91316

Shock springs and cups:
Team associated all front and rear 12mm big bore springs
Team associated shock spring cups part #91310
Yatabe/Yokomo indoor carpet springs

Shock pistons:
Team associated 12mm pistons part #91308
Team associated all 12mm factory team MACHINED tapered and flat pistons
Kyosho 12mm blank pistons part #w5303-08

Shock O-rings:
McMaster-carr o-rings...
Kyosho grooved o-rings (p3)
H-Speed 'smoothies' o-rings

Greases and lubes:
Noleen sf-3 shock o-ring grease (same stuff as associated's green slime)

STILL UNDER CONSTRUCTION...

Last edited by littlevette; 01-22-2015 at 08:14 PM.
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Old 01-05-2013, 03:54 AM
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Originally Posted by littlevette View Post
i'm still working on the rs. i'll update the rs.
What's the difference between the two? RS = Race Spec?
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Old 01-05-2013, 04:06 AM
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the rs is the sport model. it comes with the cheaper shocks, different body, and a gear diff. basically a first time starter buggy for the newcomers.
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Old 01-05-2013, 05:06 AM
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the new MR and the yokomo team are doing pretty good at the 2nd round of the TLR/Spektrum Euro Offroad Series in Langenfeld, Germany. check out the awesome array of photos of the yokomo team and new MR buggy. big thumbs up!

http://eos.redrc.net/gallery/
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Old 01-05-2013, 05:37 AM
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Ok so question...in the photos it looks like a shorty battery is the only thing that will fit. Doesn't that mean this car isn't ROAR legal?
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Old 01-05-2013, 06:56 AM
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Originally Posted by Grasschopper View Post
Ok so question...in the photos it looks like a shorty battery is the only thing that will fit. Doesn't that mean this car isn't ROAR legal?
*Ding!!
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Old 01-05-2013, 09:08 AM
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Originally Posted by Grasschopper View Post
Ok so question...in the photos it looks like a shorty battery is the only thing that will fit. Doesn't that mean this car isn't ROAR legal?
Yokomo would never design a 2wd race car that could not compete in all sanctioned bodies of racing. Shorty packs are just the flavor of the month, so they are simply showing that they can fit in the mid motor car verses using a saddle pack. If you look at the chassis you can see that it can accommodate all approved batteries in both mid motor or rear motor.

Patrick

Last edited by XCELL; 01-06-2013 at 01:35 AM.
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Old 01-05-2013, 09:10 AM
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The RS and MR bodies are actually the same, there are only different cutting lines for mid and rear motor set-up. All kinds of 2S batteries can be used for rear motor. If you want to use a full-size LiPo for mid, you'll just have to use a low-profile servo, but I think saddles are the way to go for the mid-motor car.
So far, Naoto took TQ and the first final in the 2nd round of the EOS in Langenfeld, Jörn Neumann's hometown - and Naoto is racing off-road on carpet for the first time ...
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Old 01-05-2013, 08:09 PM
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As mes stated you can use full size lipos in the mid-motor configuration. I just spent the day building the MR and overall I would say the build went pretty well. The main concern I had was the flawing on the plastic parts especially on the shock parts. The A,B and C spacers for the cartridge and the shock pistons themselves.

I have run the 22 and B4.1 and as far as assembly i would say it is generally about the same. The shocks feel butter smooth and the diff feels really good. Should have some detailed pictures on Monday at AMainHobbies.com showing more detailed shots of the rear motor setup.

Car feels sturdy yet light, can't wait to get it on the track!
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Old 01-05-2013, 08:58 PM
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Originally Posted by JT_Amain View Post
As mes stated you can use full size lipos in the mid-motor configuration. I just spent the day building the MR and overall I would say the build went pretty well. The main concern I had was the flawing on the plastic parts especially on the shock parts. The A,B and C spacers for the cartridge and the shock pistons themselves.

I have run the 22 and B4.1 and as far as assembly i would say it is generally about the same. The shocks feel butter smooth and the diff feels really good. Should have some detailed pictures on Monday at AMainHobbies.com showing more detailed shots of the rear motor setup.

Car feels sturdy yet light, can't wait to get it on the track!
do u know when the 4wheeler's will be back in stock?
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Old 01-06-2013, 12:56 AM
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Naoto just won the second 2wd final and thus round 2 of the EOS in Langenfeld!
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Old 01-06-2013, 04:46 AM
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Originally Posted by JT_Amain View Post
As mes stated you can use full size lipos in the mid-motor configuration. I just spent the day building the MR and overall I would say the build went pretty well. The main concern I had was the flawing on the plastic parts especially on the shock parts. The A,B and C spacers for the cartridge and the shock pistons themselves.

I have run the 22 and B4.1 and as far as assembly i would say it is generally about the same. The shocks feel butter smooth and the diff feels really good. Should have some detailed pictures on Monday at AMainHobbies.com showing more detailed shots of the rear motor setup.

Car feels sturdy yet light, can't wait to get it on the track!
Any chance you can post a photo from the front of the mr in mid motor configuration? All of the forward facing photos from their literature seem to be mid motor. Thanks
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