2wheels>4 Posted April 17, 2009 Report Share Posted April 17, 2009 (edited) My Yamaha shaft driven bike is rubbing the tire on the swing arm!! I just noticed this yesterday and I can't imagine it has been going on long. I have put 1500+ mi on this thing since buying it two months ago, and I hope I would have noticed the tire rubbing before now.... LOL The tire is now worn to the point that the side wall is rubbing. (that's how I noticed the damage, I saw the ring on my side wall and thought, "no fucking way I was getting THAT low and sideways"...) It appears to have eaten off the side of the tread first, then made contact with the sidewall. Sorry, I forgot to snap a pic before I left Dublin last night and I spent the night here in Obetz. Heading back soon to wrench on it and I will post some then. So, here is my quandary... Assuming that the bike wasn't purchased this way, wasn't wrecked, and the rear tire has not been off the bike since I bought it, how the hell does this happen to a shaft driven bike??? My first two thoughts are damaged (bent) swing arm from a wreck or missing shims from the hub/spindle assembly. However, I think I can rule those out... WTF? Edited April 17, 2009 by 2wheels>4 add diagrams Quote Link to comment Share on other sites More sharing options...
Chrome Posted April 17, 2009 Report Share Posted April 17, 2009 Make sure it is the right size tire. Quote Link to comment Share on other sites More sharing options...
2wheels>4 Posted April 17, 2009 Author Report Share Posted April 17, 2009 damnit... I edited it to add pics, but it posted a new thread for some reason.I believe it is stock tire size, i planned to double check, but like I said I don't think it could have been rubbing this whole time, perhaps, but unlikely. It definitely just started with the sidewalls... scary fucking shit considering how I typically ride. Side wall lets go when I'm laid into it and that might just hurt a bit. Quote Link to comment Share on other sites More sharing options...
v65rider Posted April 17, 2009 Report Share Posted April 17, 2009 Make sure the last time the tire was mounted that all spacers were installed correctly.I have all shaft driven bikes and the only reasons that the tire would rub is wrong size tire or assembles incorrectly. Quote Link to comment Share on other sites More sharing options...
2wheels>4 Posted April 17, 2009 Author Report Share Posted April 17, 2009 That was what my girlfriend suggested (I'm not making fun, she is a mechanic and a rider) and I am taking the assembly apart as soon as I get back to Dublin in an hour or so to check. That would mean it has been rubbing this whole time though and I don't like that for a number of reasons, not the least of which being that I didn't notice earlier!! Fail. Quote Link to comment Share on other sites More sharing options...
2wheels>4 Posted April 17, 2009 Author Report Share Posted April 17, 2009 Pics of said problem and resulting damage. I noted that all spacers are present and accounted for, bearings seem fine and the splines have no appreciable wear at all. Everything is well greased and clean enough. However, I believe the axle shaft may have pulled loose from the pinch bolt when I was riding her hard the other day and I may be able to just reassemble and re-torque the bolts and get everything aligned back. Of course, I should definitely get myself a new rear tire before I act the fool anymore... Quote Link to comment Share on other sites More sharing options...
guzzi949 Posted April 17, 2009 Report Share Posted April 17, 2009 So the pinch bolt was loose and axle was free to move about. Your swing arm would then twist on hard acceleration making the tire rub. me thinks. brad Quote Link to comment Share on other sites More sharing options...
2wheels>4 Posted April 17, 2009 Author Report Share Posted April 17, 2009 So the pinch bolt was loose and axle was free to move about. Your swing arm would then twist on hard acceleration making the tire rub. me thinks. bradPretty much. I ride very hard pretty much all the time and I think the pinch bolt might have been a bit loose. It pulled the axle through until it was flush with the pinch.... Now that I have it reassembled, the axle protrudes a good inch and the tire has plenty of clearance. All better, bolts tighter, added a very heavy cotter pin through the hole in the end of the axle in case it tries to walk on me again... (since I won't stop riding it like a sport bike... ) Quote Link to comment Share on other sites More sharing options...
FocusDave01 Posted April 17, 2009 Report Share Posted April 17, 2009 Pretty much. I ride very hard pretty much all the time and I think the pinch bolt might have been a bit loose. It pulled the axle through until it was flush with the pinch.... Now that I have it reassembled' date=' the axle protrudes a good inch and the tire has plenty of clearance. All better, bolts tighter, added a very heavy cotter pin through the hole in the end of the axle in case it tries to walk on me again... (since I won't stop riding it like a sport bike... )[/quote'] Quote Link to comment Share on other sites More sharing options...
Disclaimer Posted April 17, 2009 Report Share Posted April 17, 2009 Don't worry about riding it like a sportbike... Just be happy to have a bike to ride, you could've bought a sportbike and not even been able to ride it like that guy-----------^. Quote Link to comment Share on other sites More sharing options...
2wheels>4 Posted April 17, 2009 Author Report Share Posted April 17, 2009 (edited) pics of my new "anti-walk" pin for the axle... It should keep it from walking much when I flog that bitch into the twisties. And now I have some clearance... Going for test ride (yes, I connected the brakes now) and will post again if I survive... LOL Now, lets see if I can shear off that pin...Edit: I beat her for about 50 miles and it didn't budge a bit. Still got clearance, now I just need a new tire! Grrr... Pony is gonna rape my asshole. Edited April 18, 2009 by 2wheels>4 test ride Quote Link to comment Share on other sites More sharing options...
ReconRat Posted April 18, 2009 Report Share Posted April 18, 2009 Cool, and that's about the most common solution to a back end problem. Stuff moves around from the torque. I've had the axle on chain bikes move forward, even with axle nut torque correct. Sometimes they have to be a bit tighter. You might look close at the two mating surfaces, at the pinch bolt, the next time it's apart. Make sure the two surfaces are in complete contact, and not greased up or anything. Your "shear pin" should work ok. If there is any room at all, maybe a shim washer to fit under it. Quote Link to comment Share on other sites More sharing options...
max power Posted April 18, 2009 Report Share Posted April 18, 2009 I'd replace that tire immediately. Thats a blowout waiting to happen. Quote Link to comment Share on other sites More sharing options...
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