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Re: Unstable
If your bike is weaving gently side-to-side, and you CAN'T keep it going straight, your head bearings are either too tight or notchy. Thanks DonTZ125. Considering Yamaha suggested that I might want them to look at the bearing - without me mentioning this - I'm betting you are correct. And your desc...
Unstable
I (meaning a mechanic) put new tires on my 1989 FZR400 and now I feel a slight side to side instability. It's as if the road is slightly ungulated, but it's not. Although high speed on highway I don't notice it. First thing I checked was tire pressure and we're okay. Then I though maybe new tires ar...