bent wheel

[Spanish Bob]

I thought that my new tourances were some of the friday afternoon jobs that others have mentioned. After close on 1000kms they still produce bar wobble.

Just before I changed the tyres I hit a rock trail riding and there is a slight flat spot in the front wheel. You can just see it. My question is is this likely to cause the wobbles I´m getting at 60-80kmh in a straight line or faster when you lean the bike over?

I must have rode the bike 1000km after doing it and didnt notice a major change.

I haven´t changed anything else - no suspension changes etc...

Any ""cheap" solutions? Or tests I can do.

will post a foto tommorrow.

cheers

bob

 

[GEOFFREY DEACON]

IS your wheel balanced still, check your weights have not come adrift or been jet washed,
If ok then check your wheel bearings??,

 

[kcain]

I had the same problem after a tyre change at BMW in Istanbul - turned out they had warped the wheel. After fitting a new wheel the problem is still there though very slight at the speeds you mention, but goes away with higher speed. My wheel has also been balanced.
How freely does your wheel spin when the bike is on the centrestand?

 

[nud1e]

an out of balance wheel will have a resonance speed at around 80kph. Vibration will increase as you approach this speed and fall off as your speed increases.
A flat spot on a wheel will be most pronounced at lower speed, less than 60 kph, and less evident as speed increases.
An out of balance rear wheel can set up a standing wave resonance thru the bike to the handlebars as well.

Having just put Tourances on the R80GS about 300km ago, I've noticed that they have a very different feel to the very old Michelins that they replaced. The tread pattern seems track / white line any road irregularities and the ride is choppy. I've haven't had the wheels balanced as yet, just made sure that the tyres were fitted correctly. Thought that the front tyre pattern looked wrong and that the tyre should be reversed but the rotation arrow is pointed correctly.

I've had to replaced a fork oil seal, so did both. One lot of oil golden, the other a black sludge. I haven't had a good run yet, but I'm wondering if this might make a change in the feel. More to try more to learn.

 

[Spanish Bob]

yep the wheel was balanced

I think the weights are still there - will check

wheel turns the same - never been completely free.

bearing seem fine (only 10k kms)

can these flat spots be corrected or is it a new rim, wheelbuild?