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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 07-30-2016, 12:11 PM   #3466
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Xray, Exotek and RDRP all have CF chassis for this car. Has anyone tried any of them?

Unless you really need weight savings for stock, I'm not sure that this is really necessary.

JAE, you get this dialed in for OCRC yet?
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Old 07-30-2016, 04:00 PM   #3467
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Quote:
Originally Posted by JAE View Post
Great experience - I ordered front and rear carbon shock towers for my DE. It was $10 shipping I believe. Took about a week. Super fast, good communication with seller. I got 1mm droop added to rear tower, you can request customization. Keep in mind website prices are in AUD so price goes down in US dollars.
My B6D has so much more drop compared to my XB2 DE and it shows on the track. I have more traction/grip with the B6D. I run on low-medium traction clay. Would you recommend adding 3mm of droop using the Bezerk CF towers?
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Old 07-30-2016, 06:36 PM   #3468
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Quote:
Originally Posted by Poppin Fresh View Post
My B6D has so much more drop compared to my XB2 DE and it shows on the track. I have more traction/grip with the B6D. I run on low-medium traction clay. Would you recommend adding 3mm of droop using the Bezerk CF towers?
Bezerk looks like a great way to get more drop and lower the center of gravity. Ordered one to try. Thanks.
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Old 07-31-2016, 02:19 AM   #3469
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Much better. Running daniel Grobe's setup for the most part. Except running the rear shock on the inner hole on the arm. THat allowed me to rotate much better since I'm already laying down the shock on the tower. Big difference for me in rotation and less lazy in the turn

hole
Quote:
Originally Posted by Woulvesbaine View Post
Xray, Exotek and RDRP all have CF chassis for this car. Has anyone tried any of them?

Unless you really need weight savings for stock, I'm not sure that this is really necessary.

JAE, you get this dialed in for OCRC yet?
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Old 07-31-2016, 02:21 AM   #3470
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.

Last edited by JAE; 07-31-2016 at 03:25 AM.
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Old 07-31-2016, 07:08 AM   #3471
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Compared to other cars in the market, the XB2 lacks enough rear drops to handle the bumps and surface of a dirt track. Aside from removing the shims inside the shock body and the obvious shock placement adjustment, can Xray please design a revised shock tower to accommodate for the lack of rear droop?
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Old 07-31-2016, 09:27 AM   #3472
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I'm going to test the new longer shock ends today. That should also give more droop. I post here later my findings. I normally run outdoors med-high bite blue groove on pro-line X2 compound tires.
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Old 07-31-2016, 10:00 AM   #3473
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+4mm Rod ends and unscrewing a few mm more should give you all the droop you need for low bite. Bezerrk also makes carbon towers for both the DE and CE that can be ordered with up to 5mm more droop, if need be.

Personally tried the long rid ends and liked them on low bite, outdoor track running holeshots. Indoor medium bite wanted to take them off, as the buggy would wander a bit mid turn, leaning too much and reminded me of what I didn't like in my b5m... 2 cents
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Old 07-31-2016, 11:07 AM   #3474
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Quote:
Originally Posted by JAE View Post
Much better. Running daniel Grobe's setup for the most part. Except running the rear shock on the inner hole on the arm. THat allowed me to rotate much better since I'm already laying down the shock on the tower. Big difference for me in rotation and less lazy in the turn

hole
Cool. I'll look for that one. Is it on petiterc?

I plan on getting to OCRC this coming Saturday. If you're there, I'll come find you to compare notes.

We can talk to Mike as well. Do you know if your setup is close to his?

His car seems pretty good.
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Old 07-31-2016, 11:11 AM   #3475
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http://site.petitrc.com/setup/xray/setupxb2/XB2_DGrobe_Thornhill20160417/

I use the kit kickup, and inner hole on rear arm. Adrian Ramos picked up a sponsorship from XRAY. I would ask him. 21 second laps. He runs stock
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Old 07-31-2016, 11:27 AM   #3476
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Quote:
Originally Posted by JAE View Post
http://site.petitrc.com/setup/xray/setupxb2/XB2_DGrobe_Thornhill20160417/

I use the kit kickup, and inner hole on rear arm. Adrian Ramos picked up a sponsorship from XRAY. I would ask him. 21 second laps. He runs stock
Not sure I know him. Next time we're there, point him out to me. 21? Wow.
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Old 07-31-2016, 11:40 AM   #3477
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Quote:
Originally Posted by Poppin Fresh View Post
Compared to other cars in the market, the XB2 lacks enough rear drops to handle the bumps and surface of a dirt track. Aside from removing the shims inside the shock body and the obvious shock placement adjustment, can Xray please design a revised shock tower to accommodate for the lack of rear droop?
Search my posts here. Kyosho rear shock ends.
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Old 07-31-2016, 12:50 PM   #3478
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Quote:
Originally Posted by Socket View Post
Search my posts here. Kyosho rear shock ends.
Funny, this is exactly what some people did on the front of Team C buggies to get a little more droop (I actually used a Kyosho front RB5 tower on my Team C buggies, which was an exact fit . . . ).
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Old 07-31-2016, 03:18 PM   #3479
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Originally Posted by Maxxican View Post
I'm going to test the new longer shock ends today. That should also give more droop. I post here later my findings. I normally run outdoors med-high bite blue groove on pro-line X2 compound tires.
Update installed the new XRAY long shock ends on the rear of the XB2. That alone made a big difference car was landing better rear traction was better. I installed them up to flush with the threads on the shock shafts.
Then I also installed them in the front it became a little difficult to get less than 22mm ride him eight. But the car handled even better. This is what was missing on the XB2. By the time I freshened my shocks and got used to the new handling. I shaved 0.5 sec.
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Old 07-31-2016, 04:45 PM   #3480
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My XB2 carpet edition pushes on turf can anyone give me some setup advice on what I can do to add steering to it?
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