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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 12-07-2015, 10:08 AM   #391
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Guess in this world nowadays, good things come to those who publicly complain. lol.

My mail man dropped the package off not a minute after I made a post complaining. Opening the box Xray quality is amazing as to be expected. Even the packaging makes you feel like you've purchased something high quality.

Package #5 had gotten a small slice opening it up a bit and causing a small amount of pieces to scatter around the box during shipping. I hope everything is there but at quick glance it seemed all there. I Haven't been this excited to build a buggy in a while!
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Old 12-07-2015, 10:20 AM   #392
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FedEx just dropped mine off. Just looking through the kit... looks nice, and getting the ball diff free is an awesome bonus!

Just an FYI for those of you getting it from RCAmerica, FedEx will require a signature upon delivery.
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Old 12-07-2015, 04:37 PM   #393
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Well I would have had my car today but damn it Rc America! Don't send out a package needing a signature unless I ask for it! My xb4 was sent out with no signature required. I never have packages sent that way. FedEx can't even change it so now I have to get it delivered to a FedEx/kinkos.

EDIT: so it's a mistake for them to go out with a signiture. FedEx contacted Rc America and had them remove signature required for me. Good customer service from Rc America and fedex.

Last edited by suby723; 12-07-2015 at 05:01 PM.
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Old 12-07-2015, 05:01 PM   #394
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Quote:
Originally Posted by suby723 View Post
Well I would have had my car today but damn it Rc America! Don't send out a package needing a signature unless I ask for it! My xb4 was sent out with no signature required. I never have packages sent that way. FedEx can't even change it so now I have to get it delivered to a FedEx/kinkos.
Monday's just happen to be my day off, so I got lucky and was home to sign for it. I'm about 3/4 the way through the build and so far it's been great. No missing parts, fit it excellent with very little slop.
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Old 12-07-2015, 05:22 PM   #395
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Doh, I'll have my XB2 tomorrow along with an XB8E. Funny that I live so close yet I'm one of the last to receive mine... can't wait.
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Old 12-07-2015, 07:34 PM   #396
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My local track has the Shumacher handout preglued rim/tires. What hex do you run if you are using those, stock or something else?

Thanks!
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Old 12-07-2015, 07:34 PM   #397
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Quote:
Originally Posted by symmetricon View Post
Doh, I'll have my XB2 tomorrow along with an XB8E. Funny that I live so close yet I'm one of the last to receive mine... can't wait.
Awesome, can't wait to hear what you think!
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Old 12-07-2015, 07:58 PM   #398
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Quote:
Originally Posted by gticlay View Post
My local track has the Shumacher handout preglued rim/tires. What hex do you run if you are using those, stock or something else?

Thanks!
Stock hexes are fine for Schumacher wheels, very close to Xray ones.
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Old 12-08-2015, 12:50 AM   #399
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did you receive a free ball diff when you purchase the kit? thx
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Old 12-08-2015, 01:02 AM   #400
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Can someone please check to see if a YZ-2 body will fit? I suspect the trim at the steering linkage might be a little different but it looks really close overall.

This would open up some options and include the Penguin body.
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Old 12-08-2015, 02:32 AM   #401
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I built and tested my new XB2 this weekend.

Everything in the kit has a nice fit and finish.
But I was surprised to find that the screw hex sockets on the countersunk screws deform easily even at modest torque (using almost new HUDY tool).
There are 4pcs 3x18 countersunk screws that connect the kickup plate to the adapters for the front top plate, the material in those is what I would've liked to have seen for all screws.

So, be careful when tightening the screws and use good tools!

Car runs great by the way..
Feels very agile and nimble, and safe at the same time.
Handling jumps impressively with stock setup, forgiving on rough landings.
(Running slicks on felt carpet)


Best regards
Morgan
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Old 12-08-2015, 05:11 AM   #402
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Quote:
Originally Posted by mccoy View Post
did you receive a free ball diff when you purchase the kit? thx
It's was in my kit. There is a sticker on the end of the box that says
"RC America Launch Edition Kit - Includes Optional #325000 Ball Differential"
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Old 12-08-2015, 05:49 AM   #403
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Quote:
Originally Posted by avaldes View Post
Can someone please check to see if a YZ-2 body will fit? I suspect the trim at the steering linkage might be a little different but it looks really close overall.

This would open up some options and include the Penguin body.
The front is an okay fit, but in the rear it does not fit very well.

You will have to cut out a big part to have the spur gear protrude through the body (which will not be legal in most race series).
The same problem is present with the B5M bodies.

We tried different bodies during prototyping as we didn't have a stock body yet and none were a good fit in the area around the spur gear.

Bent
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Old 12-08-2015, 07:33 AM   #404
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Cool car
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Old 12-08-2015, 09:22 AM   #405
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Thanks Bent, I appreciate the assessment!

-Aaron
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