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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 01-05-2016, 02:40 PM   #871
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Quote:
Originally Posted by jswo View Post
Is the ball diff with this batch?
We only included the ball diff in our first batch of XB2 kits. There may still be a few of the launch edition kits on dealer shelves, but any shipments from this second batch and going forward will be standard specifications.

We did receive some bodies with the recent shipment. They should start to appear at the dealers in the next few days. We are sending out quite a few parts along with the kits on this second batch, so availability will improve there too. The items being ordered for the XB2 are a bit different than anticipated from the XB4 history, so we are adjusting our stock levels. There are also some options that XRAY has not started shipping yet. We will probably need one more shipment to catch up to demand for some of the option parts and wheels. We should have it all sorted out in the next couple weeks.

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Old 01-05-2016, 05:25 PM   #872
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Anyone know the part numbers for the XB2 main diff balls, plates, thrust balls etc?

Cant find it anywhere.

cheers
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Old 01-05-2016, 07:46 PM   #873
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The whole ball diff assy is part # 325000
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Old 01-06-2016, 01:53 AM   #874
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Default Xray XB2 for 13.5T and 17.5 stock classes

With the release of the Xray XB2 Dirt Edition coming up shortly I have some questions for those of you running the 13.5T and 17.5T stock classes:

Would you need both a 69 and 72 spur gear to cover the need for correct gearing in these classes ?

Are slipper eliminators used in both of these classes or just for the 17.5T ?

What is the minimum weight allowed ?
Keeping in mind the XB2 is already sub 1500 grams with standard sized servo and standard shorty battery.

Meeting up with designer (Martin B.) and manufacturer (Juraj Hudy) tomorrow so it would be nice to have some reliable info ahead of this

Bent
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Old 01-06-2016, 02:37 AM   #875
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Quote:
Originally Posted by BentKa View Post
With the release of the Xray XB2 Dirt Edition coming up shortly I have some questions for those of you running the 13.5T and 17.5T stock classes:

Would you need both a 69 and 72 spur gear to cover the need for correct gearing in these classes ?

Are slipper eliminators used in both of these classes or just for the 17.5T ?

What is the minimum weight allowed ?
Keeping in mind the XB2 is already sub 1500 grams with standard sized servo and standard shorty battery.

Meeting up with designer (Martin B.) and manufacturer (Juraj Hudy) tomorrow so it would be nice to have some reliable info ahead of this

Bent
Hi Bent,

Not sure about 13.5, but a slipper eliminator for 17.5 is a big advantage.
With my current buggy (2.6 internal ratio) I use 66 and 69 tooth spur gears.
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Old 01-06-2016, 02:41 AM   #876
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Quote:
Originally Posted by BentKa View Post
With the release of the Xray XB2 Dirt Edition coming up shortly I have some questions for those of you running the 13.5T and 17.5T stock classes:

Would you need both a 69 and 72 spur gear to cover the need for correct gearing in these classes ?

Are slipper eliminators used in both of these classes or just for the 17.5T ?

What is the minimum weight allowed ?
Keeping in mind the XB2 is already sub 1500 grams with standard sized servo and standard shorty battery.

Meeting up with designer (Martin B.) and manufacturer (Juraj Hudy) tomorrow so it would be nice to have some reliable info ahead of this

Bent
Bent,

I'll take the first shot...

Just 69...I think adding 72 right now would be a bit redundant. Most of us run 69T in 17.5 stock buggy.

I've only seen eliminators used in 17.5 classes, don't use one myself.

For weight it's 1499 grams.
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Old 01-06-2016, 02:57 AM   #877
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Quote:
Originally Posted by BentKa View Post
With the release of the Xray XB2 Dirt Edition coming up shortly I have some questions for those of you running the 13.5T and 17.5T stock classes:

Would you need both a 69 and 72 spur gear to cover the need for correct gearing in these classes ?

Are slipper eliminators used in both of these classes or just for the 17.5T ?

What is the minimum weight allowed ?
Keeping in mind the XB2 is already sub 1500 grams with standard sized servo and standard shorty battery.

Meeting up with designer (Martin B.) and manufacturer (Juraj Hudy) tomorrow so it would be nice to have some reliable info ahead of this

Bent
Minimum weight 1500g
17.5t for stock.
A 69t spur will be great.
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Old 01-06-2016, 04:11 AM   #878
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Bent, Juraj and Martin may want to note that the TLR 22 buggies come with both their improved slipper for standard modified racing (that does not fit the smaller spur), and the parts to use a smaller spur for stock racing. That's how big 17.5 class is in the USA.
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Old 01-06-2016, 04:55 AM   #879
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Quote:
Originally Posted by RichD View Post
Hi Bent,

Not sure about 13.5, but a slipper eliminator for 17.5 is a big advantage.
With my current buggy (2.6 internal ratio) I use 66 and 69 tooth spur gears.
Quote:
Originally Posted by celt View Post
Bent,

I'll take the first shot...

Just 69...I think adding 72 right now would be a bit redundant. Most of us run 69T in 17.5 stock buggy.

I've only seen eliminators used in 17.5 classes, don't use one myself.

For weight it's 1499 grams.
Quote:
Originally Posted by xrayracer1 View Post
Minimum weight 1500g
17.5t for stock.
A 69t spur will be great.
Thanks guys

Quote:
Originally Posted by gticlay View Post
Bent, Juraj and Martin may want to note that the TLR 22 buggies come with both their improved slipper for standard modified racing (that does not fit the smaller spur), and the parts to use a smaller spur for stock racing. That's how big 17.5 class is in the USA.
I know it's huge in the US, and it's non existent here in Europe, but because it's so big in the US I will try and convince them of the need of a smaller spur setup

This is not about having even more parts included in the kit but more so Xray being able to supply a factory optional off the shelf spur for stock racing with no need for modifications

The XB2 already have all the boxes ticked in the form of very light weight (no need for expensive options to lighten it) and an incredibly smooth running and lightweight drivetrain.

ECS double jointed rear drive shafts will also be available any time now and with the ultra lightweight and smooth gear diff it's a perfect base for a winning stock platform

Bent
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Old 01-06-2016, 05:10 AM   #880
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Quote:
Originally Posted by BentKa View Post
As Suby says.

Check by holding rear wheels on the bench and give throttle.

You don't want the front wheels to lift and the ball diff should not slip before the slipper.
Hi Bent

I'm building my Carpet Ed these days. Malin's performance convinced me this is the right car for me. I just have to paint it pink now

On a more serious note. Is the quote above reflecting the latest and greatest way to ballpark the slipper settings for such late gen cars with masses forward as the Xb2? I won't be using the ball diff, but the trick is, hold rear, throttle, loosen slipper until front doesn't lift?

Other than that, the build quality is stunning... nothing less than I expected from Juraj and the boyz (and girlz ).

My next step is to go to the xray website and pick up a setup for mid-grip carpet...

Thanks,
Paul
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Old 01-06-2016, 05:28 AM   #881
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I just pre-ordered my Dirt XB2.

What is the reason to use double jointed driveshaft in the rear?
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Old 01-06-2016, 06:29 AM   #882
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Quote:
Originally Posted by UK.hardcore View Post
I just pre-ordered my Dirt XB2.

What is the reason to use double jointed driveshaft in the rear?
Smoother (less chatter) and more traction

Bent
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Old 01-06-2016, 06:47 AM   #883
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Hey Bent! Just a quick question I'm not sure if has been answered or not. With the dirt edition coming out, is there a possibility of a conversion package to get some of the dirt edition parts in one go for those early adopters of the carpet XB2?
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Old 01-06-2016, 06:49 AM   #884
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I feel both 69 and 72 is needed. Most run the B5 which had the same ratio as the XB2 and these are the two most used spurs. I already saw a local racers reaming out AE spurs on Sunday to fit his carpet edition.
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Old 01-06-2016, 07:17 AM   #885
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agree.. both 69, and 72 will be great options.. i reamed out an AE gear for my car as well.. would have done a 72 also.. but they were out of stock.. i havent personally used a slipper eliminator just yet.. but i have used the slipper completly locked down..
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