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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 12-20-2015, 03:49 PM   #601
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What brass parts are compatible or available for the xb2? Anything about to be released? Especially for the rear suspension
The only brass part being made that I'm aware about is the front bulkhead.
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Old 12-20-2015, 04:16 PM   #602
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I have a Losi 22 2.0 and was going to get the 3.0 but after following this thread a while I'm leaning towards the XB2 carpet edition. I run on a high bite indoor clay track where slicks are best, I think it would do very well.

Thanks symmetricon for posting your setup, I think it would work on my track.
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Old 12-20-2015, 04:20 PM   #603
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I have a Losi 22 2.0 and was going to get the 3.0 but after following this thread a while I'm leaning towards the XB2 carpet edition. I run on a high bite indoor clay track where slicks are best, I think it would do very well.

Thanks symmetricon for posting your setup, I think it would work on my track.
They are selling like hot cakes and I believe are sold out everywhere. If you can get a kit pull the trigger and get one, you won't be disappointed. Xray quality is top notch.

I was curious if any Xray distributors had any available. Absolutehobbyz has them in stock.

http://www.absolutehobbyz.com/XRAY-X..._p_508261.html

Last edited by suby723; 12-20-2015 at 04:31 PM.
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Old 12-20-2015, 04:44 PM   #604
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Any reasoning in particular you want brass?
I want to add weight to the car towards the rear. Hoping there will be a brass arm holder like the xb4. Or some kind of ballast weight that will fit
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Old 12-20-2015, 06:35 PM   #605
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Originally Posted by KyJoe340 View Post
I have a Losi 22 2.0 and was going to get the 3.0 but after following this thread a while I'm leaning towards the XB2 carpet edition. I run on a high bite indoor clay track where slicks are best, I think it would do very well.

Thanks symmetricon for posting your setup, I think it would work on my track.
No problem, the car is really working well for me tons of steering through the corner and great rear grip on exit. It's better than my RB6 has ever been... Switching to the XB2 I was hoping the car would work as well as my RB6, so I'm super stoked that it's even better.
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Old 12-20-2015, 06:36 PM   #606
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I want to add weight to the car towards the rear. Hoping there will be a brass arm holder like the xb4. Or some kind of ballast weight that will fit
I honestly don't think it's necessary with the proper setup...
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Old 12-20-2015, 07:10 PM   #607
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I have been waiting for the dirt addition but I am now wondering if I should just get the carpet version. I won't run on carpet. Mostly clay and in summer a dirt outdoor track. I would most likely run mid motor config anyways and that is really the main difference right (ability to do rear motor with dirt version)? And did I see if you order from rc America you get a free ball diff? What do you all think? I am no where near a pro racer and I am not a super serious racer. I try to go a few times a month so I was hoping the carpet version would be just fine for my needs. Is anyone else doing this?
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Old 12-20-2015, 07:21 PM   #608
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I have been waiting for the dirt addition but I am now wondering if I should just get the carpet version. I won't run on carpet. Mostly clay and in summer a dirt outdoor track. I would most likely run mid motor config anyways and that is really the main difference right (ability to do rear motor with dirt version)? And did I see if you order from rc America you get a free ball diff? What do you all think? I am no where near a pro racer and I am not a super serious racer. I try to go a few times a month so I was hoping the carpet version would be just fine for my needs. Is anyone else doing this?
The carpet version has a lay down mm transmission. The dirt version will have a mm configuration like a b5m. If your tracks don't have high traction I would wait for the dirt edition or get the carpet edition and buy the extra parts to convert it to a dirt transmission. I am going to get all the necessary parts to convert my car to a dirt edition.
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Old 12-20-2015, 07:28 PM   #609
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What would you change from stock setup to get rid of understeer on corner mid to exit?
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Old 12-20-2015, 07:32 PM   #610
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What would you change from stock setup to get rid of understeer on corner mid to exit?
Are you running on carpet or clay?
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Old 12-20-2015, 07:37 PM   #611
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Are you running on carpet or clay?
Carpet, it understeers on power on 180
turns.
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Old 12-20-2015, 07:43 PM   #612
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What would you change from stock setup to get rid of understeer on corner mid to exit?
0 caster instead of 2. Move battery forward all the way or use yz2 foam spacers and use the thin one in the front. Take out all the limiters from the shocks. Lengthen the front camber link to the outside hole on the block.
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Old 12-20-2015, 07:50 PM   #613
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Originally Posted by suby723 View Post
The carpet version has a lay down mm transmission. The dirt version will have a mm configuration like a b5m. If your tracks don't have high traction I would wait for the dirt edition or get the carpet edition and buy the extra parts to convert it to a dirt transmission. I am going to get all the necessary parts to convert my car to a dirt edition.
Ok, I guess I will wait. I mean they felt it necessary to make 2 versions so I should get the one that was built for my type tracks I guess. Does anyone know how long they will be taking preorders on it? I can't place my order til Xmas but don't want to miss out
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Old 12-20-2015, 07:57 PM   #614
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Ok, I guess I will wait. I mean they felt it necessary to make 2 versions so I should get the one that was built for my type tracks I guess. Does anyone know how long they will be taking preorders on it? I can't place my order til Xmas but don't want to miss out
If you plan on running on high bite clay get the carpet edition. It's fully capable on high bite clay. If your on medium bite clay then I'd reconsider getting the carpet edition.
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Old 12-20-2015, 08:11 PM   #615
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Ok, I guess I will wait. I mean they felt it necessary to make 2 versions so I should get the one that was built for my type tracks I guess. Does anyone know how long they will be taking preorders on it? I can't place my order til Xmas but don't want to miss out
Call rc America tomorrow and pre order it. You will get the first shipment and they are the first dealer to receive them. They don't process the payment until the car is shipped. I'm guessing the car should be available the first week of January.
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