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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 07-05-2016, 04:58 PM   #3346
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Quote:
Originally Posted by suby723 View Post
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.
the b6 does look killer, hopefully it suits your driving style more than the xb2.
there will be a few popping up at my track soon, will be interesting to compare them.

Last edited by mourinho; 07-05-2016 at 05:36 PM.
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Old 07-05-2016, 06:19 PM   #3347
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Quote:
Originally Posted by suby723 View Post
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.
Definitely a feel thing. If the car doesn't suit you gotta try something else. Had a completely tricked out B5m with a laydown and didn't feel right to me. Get the XB2 and love everything is does and doesn't do. Some cars fit people better than others.
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Old 07-05-2016, 06:24 PM   #3348
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I am definitely not parting ways with the xb2 by any means. I fully expect Xray to keep and advancing the car. I've had the xb4 since the original and have updated every year and have been blown away each time. I would really like to see gullwing arms and a 3 gear lay down next.
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Old 07-06-2016, 06:32 AM   #3349
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Quote:
Originally Posted by suby723 View Post
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.
Bruno has also only been running 2wd buggy since right before the World's where the AE guys have been running 2wd for years. I'm not trying to discount the B6, I'm sure it's great, but they could have a lousy car and still do pretty well.
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Old 07-06-2016, 07:28 AM   #3350
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What's a good astroterph starting setup sheet. Our astroterph is not realy hight bite like some with average sized jumps and allot of tight 180s but at the same time it's a fairly large track with some high speed stuff
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Old 07-06-2016, 10:23 AM   #3351
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Wondering what the internal ratio is on the xb2 carpet so I can determine FDR. What should be my starting ratio for a mach3 17.5? I have a 75 spur and 32 pinion at the moment.
Also wondering what upgrades I should start with. I was thinking about getting the front brass lower arm mount and exotek brass front suspension holder. For the front arm mount is the 26 deg sufficient?
I was also thinking about getting the alum roll center mount, rear camber mount and steering rack.
I had an xb4'15 and really liked it then I got a HB D413 to try and i kept stripping the plastics. the overall design of that car was not my favorite. For example they screwed the tower mounts into the gear box from the top so everytime you land a jump you are applying a force on the mount screws pulling upward eventually they'd pull right out and you have to replace the plastics. I know X-ray plastics are much better and the design is a lot better so do I really even need to go with the aluminum mounts for strength? Or only if I want to add some bling?
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Old 07-06-2016, 11:34 AM   #3352
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Quote:
Originally Posted by Slapjack View Post
Wondering what the internal ratio is on the xb2 carpet so I can determine FDR. What should be my starting ratio for a mach3 17.5? I have a 75 spur and 32 pinion at the moment.
Also wondering what upgrades I should start with. I was thinking about getting the front brass lower arm mount and exotek brass front suspension holder. For the front arm mount is the 26 deg sufficient?
I was also thinking about getting the alum roll center mount, rear camber mount and steering rack.
I had an xb4'15 and really liked it then I got a HB D413 to try and i kept stripping the plastics. the overall design of that car was not my favorite. For example they screwed the tower mounts into the gear box from the top so everytime you land a jump you are applying a force on the mount screws pulling upward eventually they'd pull right out and you have to replace the plastics. I know X-ray plastics are much better and the design is a lot better so do I really even need to go with the aluminum mounts for strength? Or only if I want to add some bling?
The plastic parts are plenty strong on their own, get the aluminum parts to decrease flex.

What kind of track are you running it on?
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Old 07-06-2016, 11:55 AM   #3353
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Quote:
Originally Posted by Socket View Post
Avid/Schelle makes pistons for the xray. Anything that fits the XB4 fits this car.
Quote:
Originally Posted by seth556 View Post
The plastic parts are plenty strong on their own, get the aluminum parts to decrease flex.

What kind of track are you running it on?
For the summer it is a carpet track. I don't know specifics about it but it is a green carpet track
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Old 07-06-2016, 11:56 AM   #3354
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Quote:
Originally Posted by Slapjack View Post
For the summer it is a carpet track. I don't know specifics about it but it is a green carpet track
then yes the alum camber blocks would be helpful.

i run on astro and i run alum front pivot, alum front and rear camber blocks, alum rear hubs, carbon fiber battery strap, alum servo mounts and horn, hard plastics, etc. doing such allows the car to be more rigid and rotate around in the corners better and helps reduce traction roll.
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Old 07-06-2016, 12:24 PM   #3355
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Originally Posted by lyons238 View Post
then yes the alum camber blocks would be helpful.

i run on astro and i run alum front pivot, alum front and rear camber blocks, alum rear hubs, carbon fiber battery strap, alum servo mounts and horn, hard plastics, etc. doing such allows the car to be more rigid and rotate around in the corners better and helps reduce traction roll.
Thanks... What about the brass front arm mount and hinge pin holder? That should help with steering right? Would it hinder jumping ability and make it nose dive? Or not really?
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Old 07-06-2016, 12:41 PM   #3356
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Originally Posted by Slapjack View Post
Thanks... What about the brass front arm mount and hinge pin holder? That should help with steering right? Would it hinder jumping ability and make it nose dive? Or not really?
i wouldnt get those. you may or may not need the weight up front. but if you just get the alum thats a tad extra weight but you can still setup for clay without swapping them out.

it would make more sense to just add some weights up front if you need more weight.
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Old 07-06-2016, 01:05 PM   #3357
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Originally Posted by lyons238 View Post
i wouldnt get those. you may or may not need the weight up front. but if you just get the alum thats a tad extra weight but you can still setup for clay without swapping them out.

it would make more sense to just add some weights up front if you need more weight.
Good idea. And which alum servo mount are you using? Do I just get the xb4 exotek or X-ray alum servo mount and it is the same as the xb2?

Is the internal ratio 2.65 on the carpet edition?
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Old 07-06-2016, 01:26 PM   #3358
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The original XB4 servo mounts are the same as the XB2.

The internal ratio is the same between the carpet and dirt editions, same idler and diff gears.
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Old 07-06-2016, 04:35 PM   #3359
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Originally Posted by seth556 View Post
The original XB4 servo mounts are the same as the XB2.

The internal ratio is the same between the carpet and dirt editions, same idler and diff gears.
So is 2.65 the correct ratio then?
And the alum servo mount says compatible with xb4 and xb4'16. That is the one I want I'm assuming?
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Old 07-06-2016, 04:37 PM   #3360
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Yes. 2.65
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