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Buell Forum » 1125R Superbike Board » Archive through September 30, 2011 » Contact between rear sprocket and swingarm « Previous Next »

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Pjd2ss
Posted on Monday, September 26, 2011 - 01:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Noticed that the very outer edges of my rear drive sprocket were showing signs of abrasion. After checking, I could see there is some contact between the very tip of the drive sprocket and the inside edge of the swingarm.




Anyone seen this? The bike has been down on its right side and there were some scrapes on the swingarm, but I didn't think there was that much impact to the rear (enough to tweak the swingarm).

Is there a good way to deal with this (like a slightly bigger axle spacer on that side)? Or am I looking at a swingarm repalcement? The wheel turns by hand fairly easily, but there is some contact. Is this amount of misalignment a problem for the belt (i.e am I looking at early failure of the belt?

Any ideas? THanks.
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Froggy
Posted on Monday, September 26, 2011 - 01:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That is not normal, there normally is a good amount of space between the swingarm and sprocket. In addition to the swingarm like you checked already, I would check the wheel, sprocket, and rear axle for and deformation that may be causing your issue.

That really sucks, I hope it is nothing major.
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Brumbear
Posted on Monday, September 26, 2011 - 07:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

bearings?
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Jules
Posted on Monday, September 26, 2011 - 07:23 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That was my first thought too... but if it's that bad I'd have thought he handling would be shot too..
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Boogiman1981
Posted on Monday, September 26, 2011 - 08:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

spacers in on the wrong side?
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Two_seasons
Posted on Monday, September 26, 2011 - 08:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When you accelerate hard in gear at highway speed, what does your back end feel like?

If it feels like it's moving around back there instead of rock solid, I'd suspect wheel bearings.
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S21125r
Posted on Monday, September 26, 2011 - 08:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just looked at mine and the pulley rides about 1/16" of an inch inboard of the swingarm - so it is close to begin with.

That side of the swing arm is just along for the ride - i.e. the critical side to side dimensions are held from the right side of the swing arm. Once the entire stack of spacers and bearings are tightened to the proper torque, then the left side is locked in by tightening the pinch bolt. So I would suggest you loosen the pinch bolt and see if that side of the swing arm will spring back to the proper position. Don't forget to retighten the pinch bolt :-)
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No_rice
Posted on Monday, September 26, 2011 - 12:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

there are no axle spacers on them so that wont work. (well unless you updated to the 10 wheel which apparently has some little spacer)

mine on my 1125s are that way to. i just attribute it to something getting stuck in between the 2 for a second. there really is not much space at all in the first place. but mine are not like that all the way around, just in maybe an inch or 2 spot.
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Avalaugh
Posted on Monday, September 26, 2011 - 01:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

when you install the rear wheel its easy to catch the sprocket on the swingarm when you install the belt.Mainly as you turn the wheel to feed the belt on !
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Ohsoslow
Posted on Monday, September 26, 2011 - 02:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

pics of the drive sprocket in relation to the swingarm? might help us get an idea.
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99buellx1
Posted on Monday, September 26, 2011 - 05:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine did this after a crash also, was a bent axle.

Take it all apart and check everything for straight.
Wheel, Pulley, Axle, if they are all good, start looking closer at the swingarm.
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Pjd2ss
Posted on Monday, September 26, 2011 - 11:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for all the good suggestions; looks like got some disassembly and inspection to do. I'm assumming if the bearings are bad it will be fairly obvious once I lower the wheel?

Will post findings later. Thanks.
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Ros
Posted on Wednesday, September 28, 2011 - 05:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

One year ago on my first rear tyre change, an idiot mechanic broke my bearing and spacer when turn to the wrong side the Allen wrench.
At first time and 60km made no problem seems to appear, but then suddenly the sprocket made contact with siwngarm.
Then at the dealer and 3 weeks later when all the stuff was available for the change (the axle, spacer, bearing, dust covers, etc..).
And this is my actual separation between Sprocket and swingarm, I think is to little, only about 3mm -+, in the photo notice the thin light line, this is the separation.

How can I put this image inside the post?

http://img89.imageshack.us/img89/1985/img1335vt.jpg

(Message edited by Ros on September 28, 2011)

(Message edited by Ros on September 28, 2011)
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