is there supposed to be any play in the swingarm bolt when bolted to the frame?

[jrooster]

I apologize for starting 2 back to back threads, i forgot to mention this in my previous one. When the swingarm pivot bolt is installed in the frame should there be any wiggle room? i had some slop in the swingarm and assumed it was the bearings but noticed my swingarm bolt has some play around it after the whole thing was torn apart. If there is supposed to be no play, would the best option to be drill out the hole to a bigger size and sleeve it correctly for the pivot bolt? bike is an 86 250r

[Jmoozy27]

Is the swingarm nut torque to spec? If so then there should be no play.

[barnett468]

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When the swingarm pivot bolt is installed in the frame should there be any wiggle room?

No . . If there is more than around .005" clearance, the hole is likely ovaled.worn by running it with the nut loose on the bolt.




i had some slop in the swingarm and assumed it was the bearings but noticed my swingarm bolt has some play around it after the whole thing was torn apart. If there is supposed to be no play, would the best option to be drill out the hole to a bigger size and sleeve it correctly for the pivot bolt? bike is an 86 250r

There are a few options, these are just two.

1. Drill it out and install a chromoly, or hardened steel sleeve the same thickness as the frame.

2. Measure the diameter of the bolt.

Get two hardened machined washers, not stamped washers] that are around 5mm - 6mm thick.

Center then properly then secure them to the frame with 3 welds that are around 1/4" long . . This way they can still be removed fairly easily if needed, otherwise just put a full weld on them.

Find a swing arm bolt or standard bolt that is longer than your orig one which you can modify . . Only the smooth part of the bolt should be inside the washers, not the threads.

You can also have a bolt made . . Most swing arm bolts are around grade 5 [4.6] mild steel, but you could use grade 8 or chromoly.


Machined washers look flat and smooth with sharp edges like this

......................http://cdn.solidrop.com/photo/morton-fw-412-black-oxide-steel-heavy-duty-flat-washer-m12-bolt-size-13mm-id-x-28mm-od-5mm-thick.jpg

.............................This is a stamped washer.

....................https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTQBZGK0V34mZzq68dItkohf0Me2pB-dfxDdAQMEd6VhBybgEJn

[oldskool83]

do you have bushing in the swingarm? dust caps installed? frame holes are prob egged out.