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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 07-01-2016, 03:50 PM   #3331
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Yes, but still cheaper than a whole kit and would give you the option to go back to the DE if you didn't like it.
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Last edited by Pville Stig; 07-01-2016 at 04:52 PM.
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Old 07-01-2016, 03:58 PM   #3332
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Quote:
Originally Posted by Pville Stig View Post
Yes, but still cheaper than a whole kit and wold give you the option to go back to the DE if you didn't like it.
True, ill get them on order
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Old 07-01-2016, 05:41 PM   #3333
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yokomo gear diff outdrives, do they fit the xb2 gear diff?

xray outdrives are 3X as expensive.. outrageous!
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Old 07-01-2016, 07:45 PM   #3334
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Quote:
Originally Posted by mourinho View Post
yokomo gear diff outdrives, do they fit the xb2 gear diff?

xray outdrives are 3X as expensive.. outrageous!
It is, and I agree.
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Old 07-01-2016, 07:57 PM   #3335
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I had a hunch and it turns out that the lexan body for a Team C 02c Evo fits with some trimming.

This one was already cut and painted or I could have cut it more precisely for the xb2.
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Old 07-02-2016, 12:05 AM   #3336
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https://m.facebook.com/groups/1729446347300369?view=permalink&id=175720274785806 2

See xb2nation narrative. Yes, they do. But, you will need Yokomo dogbones too which are about $16 a pair. There are 2 options for dogbones. Either the bmax 62.5mm bones or some new 65mm bones. You use the whole Yok ball diff with the exception of the gear (use the XRAY gear as it has 1 more tooth), some shims each side and Yok Dogbones. The newer lighter bones require a bit more shimming. I have all the parts and plan to try it this weekend. I believe it's the same process for the TLR diff too with the Yok dogbones.

Quote:
Originally Posted by mourinho View Post
yokomo gear diff outdrives, do they fit the xb2 gear diff?

xray outdrives are 3X as expensive.. outrageous!
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Old 07-02-2016, 08:06 AM   #3337
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Quote:
Originally Posted by JAE View Post
https://m.facebook.com/groups/1729446347300369?view=permalink&id=175720274785806 2

See xb2nation narrative. Yes, they do. But, you will need Yokomo dogbones too which are about $16 a pair. There are 2 options for dogbones. Either the bmax 62.5mm bones or some new 65mm bones. You use the whole Yok ball diff with the exception of the gear (use the XRAY gear as it has 1 more tooth), some shims each side and Yok Dogbones. The newer lighter bones require a bit more shimming. I have all the parts and plan to try it this weekend. I believe it's the same process for the TLR diff too with the Yok dogbones.
Except he said gear diff outdrives
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Old 07-02-2016, 08:53 AM   #3338
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For the Losi, correct socket? The Yok is the ball diff. Did you see the instructions with the new 65mm lighter dogbone? I believe it added a 3mm smaller inner hub bearing and a 1mm spacer in the outer bearing? Am I reading tha right?
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Old 07-02-2016, 09:28 AM   #3339
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Quote:
Originally Posted by JAE View Post
For the Losi, correct socket? The Yok is the ball diff. Did you see the instructions with the new 65mm lighter dogbone? I believe it added a 3mm smaller inner hub bearing and a 1mm spacer in the outer bearing? Am I reading tha right?
I'm not going to endorse the usage of the 65mm bone.

That said, I've toyed with the idea of picking them up and trying them, but I do no endorse it until I try it.

That said, for the gear diff, I have no idea how it'd work. On the ball diff, you can get away with the other outdrives because you use the xb2 drive gear. With the gear diff, there's a lot of moving parts, and they're harder to retro fit.

Can a gear diff be done? Sure, anything with enough tooling and time can be done.
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Old 07-05-2016, 09:35 AM   #3340
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I'm running CE at 15-16mm ride height. Currently running the factory 1mm wing mounted all the way forward. On high grip carpet (running 3 dot front and 2 dot rear springs) with wing mounted right behind shock tower, the front edges of wing are rubbing inside of tire on the tight bends. Tried running the wing in the higher position also didn't help much. Ended up having to trim front corner edge of wing. Next step i'm going to try 1.5mm wing mounted slightly further back.

Just wondering if anyone else had same issue and how far back your wing is mounted.
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Old 07-05-2016, 09:41 AM   #3341
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I don't understand why Xray didn't release a lcg 3 gear transmission and gullwing front arms. I feel like they would both be great tuning options to have.
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Old 07-05-2016, 10:05 AM   #3342
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Quote:
Originally Posted by suby723 View Post
I don't understand why Xray didn't release a lcg 3 gear transmission and gullwing front arms. I feel like they would both be great tuning options to have.
I think it probably has to do with xray being european based and what works on those style tracks. Also, I find the 4 gear to work well with the laydown tranny and the XB2 overall. It seems the XB2 manages to have more weight in the front and center of the vehicle, and because of this the car is naturally very balanced but maybe lacking a tad forward bite. This is where the 4 gear comes in. The 4 gear seems to jive well with the XB2 because it provides good forward bite and corner speed and IMO seems to be a little smoother than 4 gears in other brand cars, 4 gears in other cars I have used seem a little jumpy and off balance when on med-high bite surfaces...but I haven't experienced that with the XB2.

But I get where your coming from a 3 gear would still be nice.
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Old 07-05-2016, 10:15 AM   #3343
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Quote:
Originally Posted by lyons238 View Post
I think it probably has to do with xray being european based and what works on those style tracks. Also, I find the 4 gear to work well with the laydown tranny and the XB2 overall. It seems the XB2 manages to have more weight in the front and center of the vehicle, and because of this the car is naturally very balanced but maybe lacking a tad forward bite. This is where the 4 gear comes in. The 4 gear seems to jive well with the XB2 because it provides good forward bite and corner speed and IMO seems to be a little smoother than 4 gears in other brand cars, 4 gears in other cars I have used seem a little jumpy and off balance when on med-high bite surfaces...but I haven't experienced that with the XB2.

But I get where your coming from a 3 gear would still be nice.
It just seems that no matter what I do the car lacks a lot of on power steering.
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Old 07-05-2016, 04:32 PM   #3344
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Quote:
Originally Posted by suby723 View Post
I don't understand why Xray didn't release a lcg 3 gear transmission and gullwing front arms. I feel like they would both be great tuning options to have.
with xray's annual redundancy program for their vehicles, those features might make it into the xb2 '17...



Quote:
Originally Posted by suby723 View Post
It just seems that no matter what I do the car lacks a lot of on power steering.
assuming your running the CE on carpet, have you tried these things?
- reduce front droop to limit weight transfer on power
- run battery forward
- add front wing
- add brass front hinge pin holder to reduce weight transfer
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Old 07-05-2016, 04:39 PM   #3345
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Quote:
Originally Posted by mourinho View Post
with xray's annual redundancy program for their vehicles, those features might make it into the xb2 '17...





assuming your running the CE on carpet, have you tried these things?
- reduce front droop to limit weight transfer on power
- run battery forward
- add front wing
- add brass front hinge pin holder to reduce weight transfer
Yeah I have those parts and have done all that. I feel that the xb2 is a tad off pace right now. Just look at the top drivers for example. Bruno kills it in 4wd but struggles to make the Amain with the xb2. Flip brands to ae and look at the b6 that has dominated already but that same driver can't get the b44 in the Amain. I love my xb4 16 but my xb2 is just off. I'll be going with a b6 in the mean time and wait for the xb2 to be updated.
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