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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 12-31-2015, 11:11 AM   #811
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Just got mine ready. Thanks bent for all the help


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Old 12-31-2015, 11:13 AM   #812
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Just got mine ready. Thanks bent for all the help



Looks good

Enjoy racing it

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Old 12-31-2015, 11:45 AM   #813
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Default wow...

This buggy is stunningly good!
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Old 12-31-2015, 11:47 AM   #814
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Just got mine ready. Thanks bent for all the help
So you're in Texas...

Are you seeing a rise in carpet offroad tracks in your area?

Buggy looks awesome!
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Old 12-31-2015, 03:34 PM   #815
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Originally Posted by celt View Post
Bent,

Looking to try out these tires. We run carpet at out track here in the States, but it doesn't have nearly the traction compared to the surfaces you run on.

http://www.racing-cars.com/pp/New_Ca...SV2/U6759.html

As these aren't low profile (higher sidewall), do you run these without inserts also?

Schumacher claims that typically you don't, curios as to what others have discovered.
I know this is a little off topic but I used to race on low grip carpet and my experiences with tires were totally different from what everyone says. Staggers had great initial turn-in, then washed out terribly. Running them without foam made it even worse. I ended up running slim mini-pins with slim foams and the handling was consistent in all segments of the corner.

Schumacher tires are stiff enough that you don't have to glue them right away, so you can buy everything you need to experiment before you commit.
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Old 12-31-2015, 04:27 PM   #816
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Default alu servo mounts

Nice purchase if you're using a low profile servo.

http://www.amainhobbies.com/rc-cars-...366201/p358316
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Old 12-31-2015, 11:21 PM   #817
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Originally Posted by celt View Post
So you're in Texas...

Are you seeing a rise in carpet offroad tracks in your area?

Buggy looks awesome!
We have 1 off road Astro turf track and 1 off road clay. The turf track is new and the first we have had. I am liking it and look forward to running the mid motor Xray.
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Old 01-01-2016, 05:57 PM   #818
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I did some more testing, trying out different setups and managed to shave of another .2 off my fast laps. My new setup is better balanced than the previous setup I posted. I'm gonna try some more stuff tomorrow and if all goes well ill post my new dirt setup.
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Old 01-01-2016, 06:49 PM   #819
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Originally Posted by BentKa View Post
No, we run 1 dot rear spring indoors with 16mm ride height and 50 g under LiPo as added weight. We however run 2x1.7 pistons with 400 cst oil.

Outdoors we always run the 1 dot rear spring as well even with as much as 120 g of weight added. Same piston and 400-450 cst oil.

Bent
Waiting for mine to arrive in middle of January. May I ask what the weight is out of the box? Why you are adding so much weight? Weight after adding the 120g?
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Old 01-01-2016, 08:20 PM   #820
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1480 with no weight for me.
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Old 01-01-2016, 09:59 PM   #821
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Here is my latest setup, i believe it is superior to my previously posted setup. i am gonna try moving the shocks to the rear next and cut down the rear wings wicker now that I have more rear grip and a slight on power mid corner push.

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Old 01-02-2016, 06:32 AM   #822
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Default tire wear?

How long do most get out of a set of rear Schumacher mini-pin rears? I assume the low profile stagger yellows go about two to one compared to the rear?
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Old 01-02-2016, 07:27 AM   #823
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Quote:
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How long do most get out of a set of rear Schumacher mini-pin rears? I assume the low profile stagger yellows go about two to one compared to the rear?
Depends entirely on the surface.

Super high grip abrasive carpet…….2 x 5 minute runs.

Outdoor astro…….20 x 5 minute runs

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Old 01-02-2016, 07:29 AM   #824
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Quote:
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Waiting for mine to arrive in middle of January. May I ask what the weight is out of the box? Why you are adding so much weight? Weight after adding the 120g?
1479g out of the box with Stagger front and Pin rear tires.

No lightweight parts and standard Futaba full alu. servo and 4800mAh shorty.

1600g fully weighted for large bumpy astro tracks running boosted 4.5T motor

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Last edited by BentKa; 01-02-2016 at 07:40 AM.
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Old 01-02-2016, 07:34 AM   #825
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Here is my latest setup, i believe it is superior to my previously posted setup. i am gonna try moving the shocks to the rear next and cut down the rear wings wicker now that I have more rear grip and a slight on power mid corner push.

I have minimal time to work on my car and you have 3 of the changes I was going to make so I'm just going to try your entire setup. I'm sure you have a lot more time on the car than me so you must know what's up!
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