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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 08-10-2016, 12:53 AM   #3511
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Most manufacturers have ditched any new development towards purpose built rear motor drive cars because the sales aren't there.

If you really want a rear motor car, the b5 rear motor is quite good and can be found new for $180 (I've driven a couple) and the VBC RM looks pretty cool and can be found for around $200 plus shipping new.
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Old 08-10-2016, 12:27 PM   #3512
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Just picked one of these CE editions up and I'm ordering some replacement parts for race day repairs. Are any of you folks breaking shock towers on big hits? I may leave these off my list if I can get away with it.
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Old 08-10-2016, 12:45 PM   #3513
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No issues with breaking shocktowers at all. On clay track. I have a bag of spares I don't use at all. If running mod, I would have diff rebuild parts handyou and slipper pads as well.
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Old 08-10-2016, 01:18 PM   #3514
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Haven't broken anything either. I would use the money to buy a spare diff to have two. I would also purchase internal shock orings for shock rebuild and the eclips (they get lost when changing pistons sometimes).
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Old 08-10-2016, 01:35 PM   #3515
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I'd get some extra rod ends, misc hardware, maybe a front bumper if your track is abrasive.

I've been running the CE pretty often since it came out and have managed to snap two ball cups on terrible landings (really bad), a carbon arm after traction rolling at the end of the straight into a concrete wall, and I pulled a ball stud out of the plastic rear roll center holder because I ran too short of a ball stud. Oh and wings, I've gone through a ton of those. All in all, I'd say the car is pretty durable..
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Old 08-10-2016, 02:39 PM   #3516
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Forgot about that. Longer ballstuds for the rear roll center holder in case you add shims or the composite roll center holder may strip, an extra composite roll center holder (or aluminum Exotek is cheap), and also smaller ballstuds for the hub of you have plastic ones. If you decide to go lower than 3mm shims on hub the ballstud with the kit long ballstud, the bottom will push plastic through just enough to bind the bearing a bit

Quote:
Originally Posted by seth556 View Post
I'd get some extra rod ends, misc hardware, maybe a front bumper if your track is abrasive.

I've been running the CE pretty often since it came out and have managed to snap two ball cups on terrible landings (really bad), a carbon arm after traction rolling at the end of the straight into a concrete wall, and I pulled a ball stud out of the plastic rear roll center holder because I ran too short of a ball stud. Oh and wings, I've gone through a ton of those. All in all, I'd say the car is pretty durable..
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Old 08-10-2016, 02:47 PM   #3517
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All very helpful, thanks folks.
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Old 08-11-2016, 01:39 PM   #3518
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Anyone know what changes Xray has in the works for the new 17 edition xb2 CE? I venture to guess the chassis doesn't change (hopefully). As they just put out a carbon chassis. 3 gear is going to be an option i bet. Hope the existing chassis has the appropriate holes drilled out... Anyone here in the know?
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Old 08-11-2016, 02:00 PM   #3519
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Quote:
Originally Posted by JAE View Post
Anyone know what changes Xray has in the works for the new 17 edition xb2 CE? I venture to guess the chassis doesn't change (hopefully). As they just put out a carbon chassis. 3 gear is going to be an option i bet. Hope the existing chassis has the appropriate holes drilled out... Anyone here in the know?
they might not release a 17 version. they don't do it with all their cars. they may just implement some running changes.
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Old 08-11-2016, 03:55 PM   #3520
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Per Bent -

Quote:
Originally Posted by BentKa View Post
3 gear laydown for the XB2 is "in development"

Keep an eye out for the official release of the XB2 '17 Carpet Edition for more information

Bent


Quote:
Originally Posted by lyons238 View Post
they might not release a 17 version. they don't do it with all their cars. they may just implement some running changes.
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Old 08-11-2016, 05:08 PM   #3521
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My kit DE kit arrived and I'm missing the 3x8 bearings for the diff case. I've gone through bag 3 and there not in that bag.

Last edited by rcfiend; 08-11-2016 at 05:22 PM.
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Old 08-11-2016, 05:33 PM   #3522
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Quote:
Originally Posted by JAE View Post
Per Bent -
Cant wait for the lay down 3 gear, I think the car would benefit greatly from it. Just hope we dont have to wait for the 17 to release before we can get our hands on it for the 16 cars
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Old 08-11-2016, 06:51 PM   #3523
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Looks like he is inferring we won't know till the 17 CE is out
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Old 08-11-2016, 08:52 PM   #3524
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Anyone else having issues with the shocks gaining pack as the race goes on? I have been running the DE for about 8 weeks now and it seems like the shocks are gaining pack, or maybe air is getting into the shocks some how. I have never noticed this on other buggies i have owned, am i missing a simple step in building them? or do i just need to change the orings/shock oil more often? I have been changing the shock oil once every race day.
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Old 08-12-2016, 12:23 AM   #3525
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anyone try these on the Xb2 yet?
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