Bad Vibes

[Kento-Moto]

Hey gang, I am experiencing more vibration than I think I should.

Here's the deal :

Vibration is slight but was first noticed about 4 months ago. I have recently changed and spin balanced rear tire and vibe continues.

Vibration felt mostly in seat and frame rather than handle bars. Vibe seems to start around 70 mph right on up and stronger when above 5K rpm but seems a little less when I pull the clutch in and coast. I havent changed anything in the drive train but tires. I am 16K miles and chain & sproc's seem to be in good condition.
any idears ? ? ?

thanx - Kent

 

[jwcfbd]

I would have them double check the balance on the rear tire. You may have thrown a weight.

 

[Johnnycheese]

try a new front tire i have seen more than one bad, balance was fine

 

[gcal]

the shop tightened my chain to much and it did that.
i had to take it back.
the wheel might not spin true

 

[Big O]

the wheel might not spin true

I agree, that might be it.
The rear tire might be wobblin'

 

[Kento-Moto]

Thanx guyz, I dint mention that I have no weights on either rim. Front tire has about 6K, rear is brand new and both have been spin bal.

I will try your suggestions... - K

 

[Johnnycheese]

Thanx guyz, I dint mention that I have no weights on either rim. Front tire has about 6K, rear is brand new and both have been spin bal.

I will try your suggestions... - K

get a new tire

 

[ks-waterbug]

I agree....... Tire!