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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 01-10-2017, 06:24 PM   #4366
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Aren't those 2 stripe progressive springs extremely hard? As in would be hard for carpet and not even in the clay spectrum?

Quote:
Originally Posted by Ray Kindstrom View Post
This is a pretty basic setup. Seems like the only uncertainty is the springs. If the car just spins out when touching the brake you might want to adjust the brakes so that you have just enough brakes to slow down but not so much that it spins out. Maybe even add a tough of drag brake. Where are you on brakes for the radio and the speed control? Check the bearings in the rear hubs. All simple things that can kill any chance of having a shot at a good handling car. With 4 deg of toe your car shouldn't be far off for a lower grip track.
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Old 01-10-2017, 10:35 PM   #4367
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Well im at a turning point. Currently i run a losi 22 3.0 and im not happy with the car. I decided instead of buying the yearly freshie kit to go with something different. Currently i happen to use the yz2 bodys on my losi cars and i have just gotten a couple bodys painted up freshly. What im wondering is whether anyone has managed to fit a yz2 shell on the xray chassis. Not sure if i like the xray body that much

Last edited by gokarter64; 01-11-2017 at 09:40 AM.
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Old 01-11-2017, 06:03 AM   #4368
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Quote:
Originally Posted by gokarter64 View Post
Well im at a turning point. Currently i run a losi 22 3.0 and im not happy with the car. I decided instead of buying the yearly freshie kit to go with something different. Currently i happen to use the yz2 bodys on my losi cars and i have just gotten a couple bodys painted up freshly. What im wondering is whether anyone has managed to fit a yz2 shell on the xray chassis.
I'm not 100% certain, but I believe I've read they fit.
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Old 01-11-2017, 06:55 AM   #4369
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Quote:
Originally Posted by Slapjack View Post
Ya, sorry. For xb2 with 2x1.6 fr and 2x1.7 rr on med bite clay.
those pistons, i am 450 front, 425 rear..
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Old 01-11-2017, 06:01 PM   #4370
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going to try a xb2... can I use my b6 wheels/tires. Anyone know if the off sets are similar??
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Old 01-11-2017, 07:01 PM   #4371
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Originally Posted by neu2this View Post
going to try a xb2... can I use my b6 wheels/tires. Anyone know if the off sets are similar??
On the rear it's pretty similar. Narrows the car about 3mm total.. but shouldn't be to bad. On the front wheels. Makes the car too wide. U need to run the thinner hexes.
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Old 01-12-2017, 10:12 AM   #4372
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do the 2017 XB2's have a front sway bar option? or one in the works?
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Old 01-12-2017, 01:13 PM   #4373
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Old 01-12-2017, 01:17 PM   #4374
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Quote:
Originally Posted by dgrobe2112 View Post
those pistons, i am 450 front, 425 rear..
Thank you... what about the gear diff. I don't really want to run a ball diff so I was going to stick with the gear diff. What fluid would be good for clay? I can't remember what I have in it now but I think I saw a clay setup that was running like 2K or 3K?

Also wondering about yokomo outdrives. Can I use the YZ2/YZ4 outdrives in my xray diffs? or would I have to put the whole yz2 gear diff in the xb2 in order to use the yokomo outdrives?
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Old 01-12-2017, 07:10 PM   #4375
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Quote:
Originally Posted by neu2this View Post
going to try a xb2... can I use my b6 wheels/tires. Anyone know if the off sets are similar??
Rears are the same offset, fronts make the car 1.5mm wider so you need a -.75 front hex.
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Old 01-12-2017, 08:12 PM   #4376
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Quote:
Originally Posted by dgrobe2112 View Post
those pistons, i am 450 front, 425 rear..
What about springs? I have the 1 dot fr and rr right now but I also have 2 dot rr and 3 dot front which I'm thinking may be better with those pistons?
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Old 01-13-2017, 08:10 AM   #4377
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Quote:
Originally Posted by Slapjack View Post
What about springs? I have the 1 dot fr and rr right now but I also have 2 dot rr and 3 dot front which I'm thinking may be better with those pistons?
start with 5k rear diff, then adjust..

for springs.. 1dot front and rear is fine.. depending on how tight your track is..

here are the ratings for the springs
Front
1dot is around a 3.3, this is a guestimate
2dot is 3.71
3dot is 4.11
4dot is 4.57

Rear
1dot is 2.0
2dot is 2.28
3dot is 2.57
4dot is 2.86

1dot to 3dot in front is a pretty big jump..

1dot to 2dot in rear is not that bad of a change.
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Old 01-13-2017, 09:16 AM   #4378
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Quote:
Originally Posted by fast-ho-cars View Post
do the 2017 XB2's have a front sway bar option? or one in the works?
No on the sway bar option for the 17' CE . as far as one in the works I have seen pictures from the EOS races of a prototype front sway bar so chances are likely.
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Old 01-15-2017, 05:44 AM   #4379
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Anyone know how long the optional longer rear shock ends are?
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Old 01-15-2017, 07:10 AM   #4380
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Originally Posted by tony montana View Post
Anyone know how long the optional longer rear shock ends are?
4mm
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