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Old 07-27-2014, 02:36 AM   #5206
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question, i bought a kit xb4 4wd on 7-24-14 from amain, built the hole kit tried to put the servo in and the ears on the servo ripped off the servo. it seems like the servo mounts on the chassis is about 2mm to 1mm to wide for the servo. servo am using is xp ds1313. has anybody else experienced this problem. also i looked at the photos of the car online and it looks like i have the 2wd drive chassis is there a difference between the 4wd drive and the 2wd?
The composite chassis frame is identical between the 2wd and 4wd version. The 4wd however, is delivered with the under gearbox plastic shim.

The alu chassis part is similar but different. The 2wd has more front kick-up and has multiple mounting holes to be able to position the servo in different positions longitudinally in the car.

Regarding servo mounting I always position everything in the car loosely tightened so that everything is positioned correctly before I tighten down the screws between the servo mount and the servo ears. I stick to this practice in any car since there are some differences regarding size between different servo makes.

Hope this helps.
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Old 07-27-2014, 06:29 AM   #5207
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I blew2 sets of rears from being on power on the down side of jumps
Id go rear and losen ur slipper some at first and tighten from there
I put them in frnt n rear and they are awesome compared to plastic ?;@)
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Oh I thought they are the bevel gears...
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Old 07-27-2014, 06:53 AM   #5208
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Originally Posted by kjsea View Post
question, i bought a kit xb4 4wd on 7-24-14 from amain, built the hole kit tried to put the servo in and the ears on the servo ripped off the servo. it seems like the servo mounts on the chassis is about 2mm to 1mm to wide for the servo. servo am using is xp ds1313. has anybody else experienced this problem. also i looked at the photos of the car online and it looks like i have the 2wd drive chassis is there a difference between the 4wd drive and the 2wd?
If you ripped a swervo out of it's mounts then 1 or 2 mm is not your problem. My servo has been moved back and new holes were drilled that are not perfectly aligned. If it were something that needed precision I would have busted out the dykem blue but it's just a servo mount. Been running like that for 2 years.
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Old 07-27-2014, 07:23 AM   #5209
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thank you
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Old 07-27-2014, 08:23 AM   #5210
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Oh I thought they are the bevel gears...
4+2 internal diff gears
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Old 07-27-2014, 12:13 PM   #5211
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Broke another upper deck on my XB4, that makes two since January. Both of them broke right where the front body post mounts, seems like the obvious weak point of the brace. Are there any options out there without the hole drilled for the body mount?

I know the short answer is "stop lawn darting into the face of a jump", sometimes things happen.
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Old 07-27-2014, 03:26 PM   #5212
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Broke another upper deck on my XB4, that makes two since January. Both of them broke right where the front body post mounts, seems like the obvious weak point of the brace. Are there any options out there without the hole drilled for the body mount?

I know the short answer is "stop lawn darting into the face of a jump", sometimes things happen.
If there was a little more clearance between the bottom of the brace and the steering rack you could use a buttonhead and a wide washer to beef it up. Maybe raise the front of the brace with shims, just enough to washer the post. Or take a broken one and fab a brace on top.
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Old 07-27-2014, 03:31 PM   #5213
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If there was a little more clearance between the bottom of the brace and the steering rack you could use a buttonhead and a wide washer to beef it up. Maybe raise the front of the brace with shims, just enough to washer the post. Or take a broken one and fab a brace on top.
My initial thought was to use a piece of the broken deck to make a brace but I like idea of using a washer to beef it up a bit. Thanks.
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Old 07-27-2014, 03:37 PM   #5214
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I run the 2 screws into the diff case tight then back off just a bit. It allows the top deck a little movement.
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Old 07-27-2014, 03:41 PM   #5215
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Get the one on eBay that goes from the front all the way to the back.
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Old 07-28-2014, 02:22 AM   #5216
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For those which are fed up with heavy chassis, give a chance to this configuration

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Old 07-28-2014, 06:20 AM   #5217
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Drove the XB4 for the first time this weekend. I ran into walls and rails and beat this thing up and broke nothing This thing is a tank!! My old TD would have crumbled!!

However, the car is nose diving in the front end. Should I add weight to the rear? I run in a indoor clay track.
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Old 07-28-2014, 06:25 AM   #5218
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Drove the XB4 for the first time this weekend. I ran into walls and rails and beat this thing up and broke nothing This thing is a tank!! My old TD would have crumbled!!

However, the car is nose diving in the front end. Should I add weight to the rear? I run in a indoor clay track.

Stay off the brakes when in the air? If you're not on the brakes are you running drag brake? If so either turn the drag brake down/off or blip the throttle a bit while in the air.
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Old 07-28-2014, 10:57 AM   #5219
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For those which are fed up with heavy chassis, give a chance to this configuration

Nice work! looks pro grade. Can you post pictures of the holes beneath? I would love to try this weight distribution. I shaved around 100 grams by using soft saddle packs and the car handles much much better now (1610 gram rtr) how much is this one?
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Old 07-28-2014, 11:08 AM   #5220
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I'd like to see a top deck without the hole for the body mount. A quick email could probably solve that.
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