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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 07-13-2016, 03:53 PM   #3391
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Quote:
Originally Posted by seth556 View Post
Carbon arms, hard parts, stiffer rear spring, heavier rear oil, move the hubs back, move the shocks out on the arm, wider rear hexs, raise the rear roll center by moving the hinge pins up and/or lowering the rear camber link, move the battery forward, less toe, more anti squat, and chassis rake (lower the front in relation to the rear).

I'd also do more things to make the front more aggressive. The 0-slot akkerman plates help a bunch and I rarely see anyone mention them, not sure if you've tried that.

I see everyone talking about getting more steering from moving the rear shocks to the inner hole on the rear arm. I think you're getting more steering because you're getting faster weight transfer. This should add rear grip coming out of the corners as it essentially makes the spring softer, as well as making the car less stable. I like this position as long as the track doesn't have any really fast sections where I need the extra stability.
Anti roll bar at the back will also be very effective.
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Old 07-13-2016, 04:13 PM   #3392
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Based on the below, regarding weight transfer, would less anti squat promote more rear grip? Specifically mid turn, on 90-180 turns getting on power? Trying to avoid washing out.


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I see everyone talking about getting more steering from moving the rear shocks to the inner hole on the rear arm. I think you're getting more steering because you're getting faster weight transfer. This should add rear grip coming out of the corners as it essentially makes the spring softer, as well as making the car less stable. I like this position as long as the track doesn't have any really fast sections where I need the extra stability.
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Old 07-14-2016, 05:22 AM   #3393
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For sure, you should get more weight transfer to the rear. More squat.

For getting on power you should also try moving the hubs forward, moving the rear shocks inward on the top and bottom, and the stock hexs will be better for this than the +3 or +3.75 hexs.
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Old 07-14-2016, 09:06 AM   #3394
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Ill try less antisquat Thx. Inner holes tower middle hole rear arm works great on my CE. The de however gets real lazy in the turns with the shocks this way. Running a slim shorty it feels like the equivalent of running a full size shorty with weight added underneath. Strange.
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Originally Posted by seth556 View Post
For sure, you should get more weight transfer to the rear. More squat.

For getting on power you should also try moving the hubs forward, moving the rear shocks inward on the top and bottom, and the stock hexs will be better for this than the +3 or +3.75 hexs.
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Old 07-17-2016, 04:05 AM   #3395
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Sorry if it was discussed already but can I convert my CE to a DE ?? If so what parts do I need I'm not looking to spend 300 plus on a new kit right now thanks.
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Old 07-18-2016, 06:50 AM   #3396
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yes.. there is a list on the xray website. also.. there are screws you need.. they are listed in the wiki
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Old 07-20-2016, 08:35 AM   #3397
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are there Xray shock rebuild kits out there? figured with them having the XB4 and TC cars out for years now i would find something.

i specificly need the 4 pcs in the middle of https://www.amainhobbies.com/xray-de...368030/p247426. i can't see paying $22.50 to get enough for 4 shocks

i found this for their 1/8 scale https://www.amainhobbies.com/xray-co...358019/p227262

anyone use any other manufacturers parts that work?
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Old 07-20-2016, 09:50 AM   #3398
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Quote:
Originally Posted by fast-ho-cars View Post
are there Xray shock rebuild kits out there? figured with them having the XB4 and TC cars out for years now i would find something.

i specificly need the 4 pcs in the middle of https://www.amainhobbies.com/xray-de...368030/p247426. i can't see paying $22.50 to get enough for 4 shocks

i found this for their 1/8 scale https://www.amainhobbies.com/xray-co...358019/p227262

anyone use any other manufacturers parts that work?
Welcome to xray. You racing this weekend?
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Old 07-20-2016, 02:27 PM   #3399
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Is there other diff rings available?
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Old 07-20-2016, 03:31 PM   #3400
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Quote:
Originally Posted by Socket View Post
Welcome to xray. You racing this weekend?
yes gtg for this weekend as long as the track don't get rained on. car is ready, rebuilt shocks using new shafts, seal, and cartridge pieces from extra kit. looking to replace the spares. will probably have to do a fon kall to xrayamerica,
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Old 07-20-2016, 03:41 PM   #3401
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Call Losi parts house. Awhile back They were thinking of putting a shock rebuild kit out...

of
Quote:
Originally Posted by fast-ho-cars View Post
yes gtg for this weekend as long as the track don't get rained on. car is ready, rebuilt shocks using new shafts, seal, and cartridge pieces from extra kit. looking to replace the spares. will probably have to do a fon kall to xrayamerica,
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Old 07-20-2016, 03:42 PM   #3402
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I would like to know as well if there are other diff rings that would fit? Need to order a bunch
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Is there other diff rings available?
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Old 07-20-2016, 07:58 PM   #3403
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Which aluminum servo horn can I use on my xb2 CE I stripped out the plastic one. ??������
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Old 07-20-2016, 08:36 PM   #3404
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Which aluminum servo horn can I use on my xb2 CE I stripped out the plastic one. ??������
Running losi part # LOSA99032/25T works great.
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Old 07-20-2016, 09:42 PM   #3405
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Check the wiki above. Socket listed a Protek arm that works..
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