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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 03-07-2016, 04:09 PM   #1816
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Default w00t!!

All good fellas, seems everyone that wanted one has it coming.

Let the builds (and driving reports) begin...
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Old 03-07-2016, 04:35 PM   #1817
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my wheels that i pre-ordered a while back has shipped too. Might just order another set to be safe
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Old 03-07-2016, 05:15 PM   #1818
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Is there any information on the mounting of the rear motor yet now that the dirt edition is available?
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Old 03-07-2016, 05:38 PM   #1819
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Last edited by MX304; 03-07-2016 at 05:49 PM.
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Old 03-07-2016, 05:51 PM   #1820
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built....won't be able to use it till next week.
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Old 03-07-2016, 06:12 PM   #1821
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Quote:
Originally Posted by WesRaven View Post
Just out of curiosity as I prep wheels and tires for my DE, do AE (or anything else) fit the rear? If so, happen to know the offset difference? Going to buy some extra stock rears, just wondering what else fits in case I get in a bind or want to share tires with my non-Xray track buddies.
Yes the AE wheels fit. I was chatting with Bayer a couple weeks back and he said the difference was almost negligible because they were so close. thats why I say you can run either the 3 or 4 stripe hexes.

the only wheels that I have had questionable luck with is Kyosho wheels. Had to borrow a pair in a pinch this weekend and had to ream the hole out a little bit otherwise all the major brands will work if you are in a tough situation.

I will say, if you are in need of traction then run the stock xray wheel. It is a little bit softer than most others.


Quote:
Originally Posted by Eaglesrx View Post
was going to ask type of track you were testing on. but, found your setups on petitrc. cool

track from this weekend was crazy. in florida we love to prep our tracks with calcium chloride or something similiar

So what happens is the morning is super wet, slick, and the track is slow = 4 gear with super soft tires

Round 2 of qualifying, track is 2 seconds a lap faster = 3gear with harder tires

Mains, sun is down and moisture is coming back up = 3 gear but clay tires with special sauce


hard to explain in type but pretty much ran on it all. TQd 2wd but didnt have the right compound tires for the main so I was "best of the rest" without them and my laps were almost a full second off the winners. Cars was as good as could be
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Old 03-07-2016, 08:14 PM   #1822
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Quote:
Originally Posted by Photocycler View Post
hey Guys, would like to add about 25grams of weight below the battery. i see motive has some weights coming out but wondering if anyone else makes them?
SMC makes weights that are supposed to slide in next to your foam but they would fit under the lipo as well. I think they are 30g. I have several packs of them that I never used. Here's a link:

http://www.smc-racing.net/index.php?...y&path=131_136
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Old 03-07-2016, 08:34 PM   #1823
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http://motivrc.com/accessories/#!/“S...egory=13438641
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Old 03-08-2016, 10:10 AM   #1824
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Quote:
Originally Posted by Photocycler View Post
hey Guys, would like to add about 25grams of weight below the battery. i see motive has some weights coming out but wondering if anyone else makes them?
Just so happens this one is 25grams

http://www.amainhobbies.com/rc-cars-...r10014/p469224
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Old 03-08-2016, 12:28 PM   #1825
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Just picked up the XB2 Carpet version. What length sensor wire do I need?
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Old 03-08-2016, 01:07 PM   #1826
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4"-5"
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Old 03-08-2016, 07:13 PM   #1827
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Hey guys question on steering throw. I setup th steering link as shown in the book,mbascially no threads showing. When I adjusted my EPA it seems I'm not getting full throw on one side. Servo horn is slightly off 90 with no steering trim-even set at 90 with trim still can't get enough to throw.

Any suggestions?
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Old 03-08-2016, 08:07 PM   #1828
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Quote:
Originally Posted by Photocycler View Post
Hey guys question on steering throw. I setup th steering link as shown in the book,mbascially no threads showing. When I adjusted my EPA it seems I'm not getting full throw on one side. Servo horn is slightly off 90 with no steering trim-even set at 90 with trim still can't get enough to throw.

Any suggestions?
what servo
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Old 03-08-2016, 08:07 PM   #1829
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Quote:
Originally Posted by Photocycler View Post
Hey guys question on steering throw. I setup th steering link as shown in the book,mbascially no threads showing. When I adjusted my EPA it seems I'm not getting full throw on one side. Servo horn is slightly off 90 with no steering trim-even set at 90 with trim still can't get enough to throw.

Any suggestions?
double check your front spindles are installed correctly..
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Old 03-08-2016, 08:08 PM   #1830
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Savox 2263
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