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R/C Tech Forums Thread Wiki: 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 10-20-2017, 03:02 PM   #5101
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I'm trying to decide which mod motor I want. I know I want a smooth motor to help learn how to drive a 2wd. I have a 8.5 sitting around but I'm thinking that may be a little too powerful. I will run on a medium and a medium/large track w/ different layouts every other week. I believe I am in the market for a 10.5, I know some guys run a 10.5 at the larger track. So I'm looking for some options on "smooth" motors. Thanks guys
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Old 10-23-2017, 11:00 AM   #5102
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When is the new 2018 CE buggy going to hit the streets?
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Old 10-23-2017, 11:02 AM   #5103
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Are the aluminium rear uprights the same height as the composite ones?
I see a lot of carpet setups with 6 under upperlink?
Manual says 4 mm as default.
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Old 10-23-2017, 12:47 PM   #5104
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Quote:
Originally Posted by xraydriver1 View Post
Are the aluminium rear uprights the same height as the composite ones?
I see a lot of carpet setups with 6 under upperlink?
Manual says 4 mm as default.
I believe the aluminum hubs are 2mm lower so 4mm on the plastic hubs are the same as 6 on the aluminum ones.
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Old 10-23-2017, 02:10 PM   #5105
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I ended up getting a tekin rs with a 10.5 combo. I was going to use my smc 120 out of my 2wd truck but it took a crap and smc wont have more till late november. So tekin it is, kit is due in today. Hopefully ill have it race ready by the weekend
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Old 10-24-2017, 07:51 AM   #5106
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Anyone know what hexes the 18 needs to run b6 wheels. From what I can tell due to new geometry its now different then the 16 17s. Thanks
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Old 10-24-2017, 07:56 AM   #5107
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Quote:
Originally Posted by symmetricon View Post
I believe the aluminum hubs are 2mm lower so 4mm on the plastic hubs are the same as 6 on the aluminum ones.
the axle is also higher on the alm compared to plastic.
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Old 10-24-2017, 09:27 AM   #5108
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Quote:
Originally Posted by rider313 View Post
the axle is also higher on the alm compared to plastic.
True, butI'm not sure how much...
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Old 10-29-2017, 06:32 PM   #5109
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Well I got everything together the last few days. Ride height and camber need to be set at the track tomorrow. Due to the weather I have off tomorrow so track day it is. Diff is broken in the way Tessmans video shows. Now my xb4 needs a full day to get it fully ready for the winter season.
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Old 10-29-2017, 08:58 PM   #5110
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Is there any one making a gearbox and bulk head shim kit for the xb2 like what you can get for the b6?
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Old 10-30-2017, 07:05 AM   #5111
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Got my new XB2 and Xb4 18s and built up the XB2 while racing at 1/8 roar regionals in Houston. The new car builds fantastic and the updates to the shock are a huge improvement, the shocks are now Kyosho good, buttery smooth and supple and now the shock pack up so much better. The stock shock setup is amazing now.
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Old 10-30-2017, 09:44 PM   #5112
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Quote:
Originally Posted by jt409 View Post
Is there any one making a gearbox and bulk head shim kit for the xb2 like what you can get for the b6?
Haven't heard of one, or seen any need for one.
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Old 10-31-2017, 04:20 AM   #5113
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on front shocks the kit has 2mm spacers on outside of shocks above the spring perch. If you take these out and run none what are will this change on the track feel
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Old 10-31-2017, 06:43 AM   #5114
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Quote:
Originally Posted by scr8pn4205 View Post
on front shocks the kit has 2mm spacers on outside of shocks above the spring perch. If you take these out and run none what are will this change on the track feel
Well, the front should be able to roll more however i believe at that point you'd most likely be traction rolling if cornering to take advantage of the extra shock stroke. Without the shims the extra shock stroke allows the tire to compress upwards well past the bottom of the chassis. It may work well on a rough track...
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Old 10-31-2017, 10:09 AM   #5115
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Quote:
Originally Posted by Pville Stig View Post
Haven't heard of one, or seen any need for one.
Bummer, It seems to be an effective tunning ade from what ive seen and experianced. But it all depends on driver, car set up and track conditions but thats what tunning options are for. I shimmed my front bulk head after being told by a tekno team driver to try it and i though it was a big improvement so i was hopping someone made proper fitting shims.
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