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R/C Tech Forums Thread Wiki: Official Xray XB2 2WD Buggy Thread
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Last edit by: dgrobe2112
Instruction manuals: (C/O BentKa)

Xray XB2 Carpet Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...ual_v2_low.pdf

Xray XB2 Dirt Edition Instruction Manual
http://www.teamxray.com/xb2/2016/dow...w.pdf?update=2

BentKa: Carpet Edition 4 gear to 3 gear laydown conversion parts:
  • Gearbox #323014
  • Motorplate #324012
  • 36T idler gear #324236
  • Brace for waterfall #324031


Socket: Bodies Available:

Xray has two OEM bodies, the .75mm and the .50mm light weight:
light weight: https://www.amainhobbies.com/xray-xb...329701/p492942

OEM .75mm: https://www.amainhobbies.com/xray-0....329700/p477762

Also, I've fitted the yz2 body, both the light and regular fit fine, just make your own cut lines:
https://www.amainhobbies.com/yokomo-...z2-101/p417674


[i] J Concepts S2 Body [i]


Penguin Racing makes a high grip body that fits the DE and CE:
http://www.ebay.com/itm/X-Ray-Xb2-Hi...oAAOSw1S9WewHV



Socket: Wheel fitment:

According to some, you'll require different offset rear hexes to use B5M wheels. According to my Hudy setup board, B5M wheels are the same offset. I measured the overall width of the car with XB2 wheels, and then again with B5M wheels, same measurement.

On the front, B5M wheels were 1.5mm wider. Xray offers hexes to reduce width -.75 on each side, or you could spend 3-5 minutes and sand your OEM hexes down .75mm.

edit by dgrobe2112
here are the hubs for losi and AE

for AE Front 365354 -0.75
for Losi rear 365358 +3.00 (4 stripe)
for AE rear 365359 +3.75 (5 stripe)



Socket: Flex and the XB2:

Flex screws are as follows:

Plastic bulkhead between motor and waterfall. Can remove screw in chassis, or remove bulkhead altogether.

Waterfall has 4 screws, can remove the inner two or outer two. IIRC, removing the inner two provides more flex, and thus more bite.

Removing the battery brace. This gives a tremendous amount of flex on the middle of the car, and can sometimes be inconsistent. I do this for outdoor racing on low bite. I like the feel over the 4 gear in 17.5 racing, since the 4 gear will take some snap away off the corner.

Rear C block - has inner and outer screws. I haven't played with this, as it's a crucial pivot point of the car.

Medium arms and towers -> I don't believe the carpet car has the rear medium tower available, however the DE DOES have an optional hard part. I think the hard parts are more consistent, especially when it gets hot (90+ degrees F). However, the medium parts do NOT break unless you're severely talented. They also don't wear out.



Socket: Avid/Schelle Slipper mod:

Credit to WillS, Matt Trimmings, and myself for figuring this out months ago.

Parts you'll need:

B5M V2 3gear compatible top shaft.
TKO Special 5x13x5 bear OR 5x13x6 bearing Either can work. This replaces the spur side bearing on the top shaft.
5mm shims, same shims used in 1/8th scale clutch bells. Look for protek .1mm and .2mm kit.
Avid or Schelle b5m top shaft kit, with spur gears of your choosing. (DE can't handle a 69, the CE can)

Shimming: You'll need to install the bearing in the front portion of the removable piece for the shaft. Make sure the bearing is pushed all the way in. With the TKO bearing, you'll need to shim approximately 1.4mm on the front side of the top shaft. Roughly .3-.5mm with the other bearing. This is a "feel" and tolerance setting. I urge you to watch videos about setting clutch bell play in 1/8th scale to get an idea of what yield you want for end play. Too tight, it'll eat bearings.

Outside of trans case: Use Avid/Schelle top shaft spacer plus .2mm shim to offset slipper from motor plate perfectly. Install slipper as instructed, and use Avid/Schelle spring and XB2 slipper nut.

- NEW - Schelle now sells Xb2 Topshafts. They include a spacer, so no need for shims in gearbox, and comes with the smaller bearing. Both methods work.

Socket: Yokomo Differential or MIP pucks:

Credit to: WillS for figuring out pucks, and as well fitting the Losi 22 diff with the same mods.

Parts needed: Yokomo Bmax2 or YZ2 complete diff OR Mip PUCKS outdrives
Xb2 diff gear
Bmax2 V3 Worlds rear dog bones, or Bmax 2 pucks dog bones
You'll use XB2 axles, and will require no other mods for the axles or dog bones.
You'll need .2mm outdrive/diff shims. Shim approximately .5mm on each side of the diff, behind the bearings. The top portion of the transmission is what "sets" the diff in place, not the bottom half. A little play back and forth is fine, the stock diff has some play from the factory.

dgrobe2112: CE to DE conversion:
along with the parts needed.. you MUST have these following hardware, or it wont work

https://www.teamxray.com/xb2/2016/do...conversion.pdf

(3) XRAY 902340 M3x40 button head screws. these are the screws that mount the motor mount to the tranny
(4) XRAY 903322 M3x22 counter sunk screws. these are for the rear diff case, to mount to the chassis. i think i used some M3x18 and they worked ok.

Socket: Best method for setting up the XB2 ball diff:

The XB2 diff is stellar when setup correctly. The spring is too short and soft, allowing the diff to slip. You'll need to glue the rings to the outdrives with just a drop of CA, then add a 1mm shim between the spring and the outdrive. This preloads the spring and stops the diff from slipping so easily.

OR, you can run the AE diff spring, which is both slightly longer, and stiffer. The overwhelming issue is the stock spring allows the nut to bottom out on the outdrive before the diff is tight enough.

This shim:
https://www.amainhobbies.com/xray-al...a303122/p12070

This diff spring (don't need a shim, then.)

https://www.teamassociated.com/parts...thrust_spring/

Functional Aftermarket parts: (Not just bling!)

Servo Horn: (The B5M sized horns are too short to get full throw)
https://www.amainhobbies.com/protek-...800-bk/p273496


Socket: Exotek has a full suite of parts, some bling, some not. Here's a list (all fit DE and CE, unless otherwise noted):

Titanium front axles: http://www.exotekracing.com/xb2-titanium-front-axles-2/

Rear Hanger, HD (Adds 4 grams): http://www.exotekracing.com/xb2-rear...75-heavy-duty/

Brass C block, 18 grams added: http://www.exotekracing.com/xb2-rear...-brass-weight/

Alloy front camber mount: http://www.exotekracing.com/xb2-fron...er-mount-7075/

Carbon Fiber Chassis: http://www.exotekracing.com/xb2-carb...m-plate-2-5mm/

Alloy rear hubs:http://www.exotekracing.com/xb2-allo...ub-set-2-7075/

Alloy servo mounts, allow for use of LP servo:http://www.exotekracing.com/xb2-xb4-...-alloy-1-pair/

Titanium shock mounts: http://www.exotekracing.com/xb2-xb4-...shock-posts-2/

Slipper Eliminator: http://www.exotekracing.com/xb2-direct-spur-mount/
Xray eliminator is #324100

dgrobe2112: 2016-2017 new 3 gear laydown
Gearbox #323014
Motor plate #324012
36T idler gear #324236
Brace for waterfall #324031

dgrobe2112: Xray Spring Rate Conversion:
front C WHT
368174 2 str 0.65-0.85 3.71-4.85

358184 2 dot 0.65 3.71
368185 3 dot 0.72 4.11
368186 4 dot 0.80 4.57


Rear
368273 2 str 0.35-0.45 2.00-2.57

368284 1 Dot 0.35 2.00
368285 2 Dot 0.40 2.28
368286 3 Dot 0.45 2.57
368287 4 Dot 0.50 2.86

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Old 07-26-2016, 08:05 PM   #3451
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Quote:
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Be on the lookout for McKune to make a rear carbon shock tower in a few weeks.
Bezerk does he make cf for xb2 f/r????
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Old 07-26-2016, 09:03 PM   #3452
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Yes, for the DE rear tower as well. Also has options to customize measurements to add droop

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Bezerk does he make cf for xb2 f/r????
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Old 07-27-2016, 03:50 PM   #3453
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My rear camber links don't connect at the shock tower but on mounts located behind the rear shock towers. I followed my build via the manual but i still get my turnbuckles hitting the spring on compression. Th only way I can get a few mm is by shortening my wheelbase which I'd rather not do.
Is your rear tower on the right way round???
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Old 07-28-2016, 04:37 AM   #3454
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Question about gearing.....

I'm running on an indoor, high bite medium size clay track with an Xray Xb2 CE. I'm switching to mod and I'll be running a 13.5 Tekin Redline gen 3. Any gearing suggestions would be greatly appreciated. Thanks!
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Old 07-28-2016, 08:18 AM   #3455
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Quote:
Originally Posted by Quietman View Post
Is your rear tower on the right way round???
I double checked my manual. Can you please post a pic of you clearance on your XB2 Dirt edition for reference?
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Old 07-28-2016, 08:25 AM   #3456
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Quote:
Originally Posted by ProfessorX View Post
Bezerk does he make cf for xb2 f/r????
He's all the way in Australia. Has anyone had experience buying from him and how fast does he ship items purchased?
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Old 07-28-2016, 09:27 AM   #3457
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so what appears to be the low points of this vehicle? The main thing i have read is concerning steering? Is this just a setup issue?

How has parts wear been?
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Old 07-28-2016, 02:01 PM   #3458
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Great experience - I ordered front and rear carbon shock towers for my DE. It was $10 shipping I believe. Took about a week. Super fast, good communication with seller. I got 1mm droop added to rear tower, you can request customization. Keep in mind website prices are in AUD so price goes down in US dollars.

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He's all the way in Australia. Has anyone had experience buying from him and how fast does he ship items purchased?
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Old 07-28-2016, 02:17 PM   #3459
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Only downside I see is a little less traction than the B5m's of the world. Steering is great. Problem for me regarding steering is in medium grip I've layed my shocks down on my DE for better grip and that caused the steering to be a little lazy. Non issue with the CE.

Regarding durablility, I have a box of spare parts for two xb2's i have not touched. Epic crashes. Nothing breaks except stripping the composite rear roll center holder. User error, as you need longer ballstud when adding shims to the camber link mount above 2mm. If I were to do again I would only stock up on orings for the rebuild. maybe a rear roll center holder, just in case.Save your spare parts budget for other stuff like an extra screw kit, or maybe buy an extra ball diff just to have on hand.

Quote:
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so what appears to be the low points of this vehicle? The main thing i have read is concerning steering? Is this just a setup issue?

How has parts wear been?
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Old 07-28-2016, 10:27 PM   #3460
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Quote:
Originally Posted by JAE View Post
Only downside I see is a little less traction than the B5m's of the world. Steering is great. Problem for me regarding steering is in medium grip I've layed my shocks down on my DE for better grip and that caused the steering to be a little lazy. Non issue with the CE.

Regarding durablility, I have a box of spare parts for two xb2's i have not touched. Epic crashes. Nothing breaks except stripping the composite rear roll center holder. User error, as you need longer ballstud when adding shims to the camber link mount above 2mm. If I were to do again I would only stock up on orings for the rebuild. maybe a rear roll center holder, just in case.Save your spare parts budget for other stuff like an extra screw kit, or maybe buy an extra ball diff just to have on hand.
If you are using the inside hole put a long set screw in the non-used hole of roll center block. I've not had one rip out since.
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Old 07-28-2016, 10:54 PM   #3461
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Is this in addition to the longer ball stud? Also, btw forgot to add, if you use only 2mm on the rear hubs you must use a shorter ball stud. The longer ball stud on the hub will expand the plastic and bind the bearing a bit. Still drive able but will be difficult to get the inner bearing out. Aluminum hubs no issue
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If you are using the inside hole put a long set screw in the non-used hole of roll center block. I've not had one rip out since.
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Old 07-29-2016, 07:09 AM   #3462
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Quote:
Originally Posted by JAE View Post
Is this in addition to the longer ball stud?
I run a 10mm ballstud (if I remember correctly) and have no issues. I can run with/without 2mm washer. With 2mm the ballstud sits flush on bottom. Running the set screw in empty hole just ensures the plastic does not flex and let go.

Last edited by timannnn6; 07-29-2016 at 06:23 PM.
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Old 07-29-2016, 07:49 AM   #3463
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Xray dropped their own Carbon chassis.
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Old 07-29-2016, 09:26 PM   #3464
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Default Carbon chassis

X-rays new carbon chassis reads it will increase flex and traction. It's 2.5mm. I don't read anything regarding the exotek 2.5 mm carbon increasing traction. Could there be something different about the carbon used? I know Socket's liverc write up indicated it was stiff and that was the benefit. Anyone else have any expereince with this and could it be the weave?
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Old 07-30-2016, 08:29 AM   #3465
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I am sure the weave will give the two carbon chassis a different flex. A lot goes into the making of carbon fiber to determine it strength for what it is used for. No way of knowing if the same vender is making both chassis for Xray and Exotek though.

Just not sure why not just leave out some of the side pod screws to give them aluminum chassis more flex. Never see a set up posted that has screws removed from the side pods other than a Kyosho RB6 set-up.
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