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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 01-19-2016, 04:17 AM   #1081
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Quote:
Originally Posted by rekim View Post
is there a list of part numbers anywhere for the difference between the dirt and carpet editions?

was thinking of getting them to be able to switch back and forth, but it its super expensive, i might just get the dirt as well...and throw in a gear diff ( I dont like ball diffs)
You will have to wait for the official release of the Dirt Edition to get the part numbers needed

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Old 01-19-2016, 05:27 AM   #1082
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Originally Posted by BentKa View Post
You will have to wait for the official release of the Dirt Edition to get the part numbers needed

Bent
I'm betting and if I recall correctly I think it was mentioned that a conversion kit will be available to convert from the CE to the dirt edition once the dirt edition s out...
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Old 01-19-2016, 05:33 AM   #1083
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I'm betting and if I recall correctly I think it was mentioned that a conversion kit will be available to convert from the CE to the dirt edition once the dirt edition s out...
doubt it will be a "kit" as thats not really how xray work.
however im sure xray will release a list of parts which you can purchase seperately in one order to convert the carpet to the dirt edition.
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Old 01-19-2016, 05:38 AM   #1084
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We [...] then add an adjustable turnbuckle connected to the battery brace and the "waterfall" to further stiffen the chassis lengthwise and create more equal flex.
Pic, please? Curious to see the mounting point.... thanks
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Old 01-19-2016, 05:44 AM   #1085
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Quote:
Originally Posted by Lonestar View Post
Pic, please? Curious to see the mounting point.... thanks
Replace middle screw on waterfall with a 10mm ball stud.

Drill hole in battery brace 2/3 towards the front.

Attach using a lower shock mounting ball from the T4 and a countersunk 3mm screw on bottom of the brace so it doesn't protrude and interfere with the battery.

Use a steering link from XB4, rod end from XB4/XB2 on waterfall and shock rod end on the battery brace side.

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Old 01-19-2016, 05:45 AM   #1086
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Quote:
Originally Posted by symmetricon View Post
I'm betting and if I recall correctly I think it was mentioned that a conversion kit will be available to convert from the CE to the dirt edition once the dirt edition s out...
Quote:
Originally Posted by clarkie_ni View Post
doubt it will be a "kit" as thats not really how xray work.
however im sure xray will release a list of parts which you can purchase seperately in one order to convert the carpet to the dirt edition.
Nobody has mentioned a conversion kit.

But it will be fairly easy and not many parts will be needed.

A small list will most likely be made for those wanting to convert

If I have the time I might put it together and have it ready for the release as I have all the part numbers here…….hmmmm

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Old 01-19-2016, 06:07 AM   #1087
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Ooops, sorry, guess I must have been daydreaming about it lol.
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Old 01-19-2016, 06:14 AM   #1088
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Well not sure when the XB2's are going to ship, but ill be waiting until the XB4's come back in stock at RC America. Hopefully they said the beginning of next week. Really want to try this dirt edition
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Old 01-19-2016, 06:17 AM   #1089
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Originally Posted by RobsRacin View Post
Well not sure when the XB2's are going to ship, but ill be waiting until the XB4's come back in stock at RC America. Hopefully they said the beginning of next week. Really want to try this dirt edition

My LHS in CT had both in stock last I was there, which was sunday
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Old 01-19-2016, 06:27 AM   #1090
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Originally Posted by BentKa View Post
The car is actually designed to have the battery brace clamp down on the battery.

We go the opposite way of your suggestion and add foam strips under the carbon battery brace to ensure it clamps securely on the battery and then add an adjustable turnbuckle connected to the battery brace and the "waterfall" to further stiffen the chassis lengthwise and create more equal flex.

When doing so we also remove the flex screws from the waterfall under the chassis.

This works really good for us

Bent
That's very interesting, not the most controlled method of stiffening a chassis, but who am I to argue..

Good solution with the turnbuckle, I've noticed quite a lot of flex lengthwise so think I will try that. Thanks for sharing Bent!
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Old 01-19-2016, 06:28 AM   #1091
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Quote:
Originally Posted by BentKa View Post
Replace middle screw on waterfall with a 10mm ball stud.

Drill hole in battery brace 2/3 towards the front.

Attach using a lower shock mounting ball from the T4 and a countersunk 3mm screw on bottom of the brace so it doesn't protrude and interfere with the battery.

Use a steering link from XB4, rod end from XB4/XB2 on waterfall and shock rod end on the battery brace side.

Bent
Thanks, got it. It's the "drill the battery brace" I was missing

Interesting idea for sure, seen on other MM buggies (centro being the first one) but somehow not that widespread?

Cheers!
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Old 01-19-2016, 06:44 AM   #1092
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Quote:
Originally Posted by BentKa View Post
The car is actually designed to have the battery brace clamp down on the battery.

We go the opposite way of your suggestion and add foam strips under the carbon battery brace to ensure it clamps securely on the battery and then add an adjustable turnbuckle connected to the battery brace and the "waterfall" to further stiffen the chassis lengthwise and create more equal flex.

When doing so we also remove the flex screws from the waterfall under the chassis.

This works really good for us

Bent
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Old 01-19-2016, 06:52 AM   #1093
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Originally Posted by Franzchise View Post
My LHS in CT had both in stock last I was there, which was sunday
Which shop? Madness? I already have an XB4, but the order that went in had another for someone else. The dirt hasnt actually released yet so
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Old 01-19-2016, 06:59 AM   #1094
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Which shop? Madness? I already have an XB4, but the order that went in had another for someone else. The dirt hasnt actually released yet so
Ya madness, I misunderstood, I thought you were looking for carpet ed for now, but there was a xb2 there on Sunday.
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Old 01-19-2016, 07:01 AM   #1095
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Ya madness, I misunderstood, I thought you were looking for carpet ed for now, but there was a xb2 there on Sunday.
I was thinking of trying the Carpet edition, but I only get to run carpet/turf maybe twice a year, and the clay/topsoil I mainly run on isnt all that high of bite. So ill just wait for the dirt car
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