I know I'm digging up an old thread, but my 97 T-100 has done the exact same thing since I bought it 3 years ago. No vibration until right at 60 mph... sometimes worse, somtimes better, but always a slight vibration. I replaced the BIG-O tires with REVOs a while ago, and had COSTCO use a Haweka adapter and all. The vibration is still there. I think there is something off with some of the T-100s and finding the source of the problem has been an enigma. Oh yeah, new idler arm and steering dampner a few years ago. If anyone figures it out, please let me know.

Thanks,

Vern

Have you checked the front wheel bearing preload? Any play if you grab the tire at 12 and 6 o-clock?

I have a shake sometimes at 60mph but only if there is a strong side wind and I have the steering wheel slightly turned to correct.

I am almost positive it is from a tiny bit of slop in the preload.

Chad

I can tell you what I did to fix my T100 I sold it. I tried to locate the problem and found out quickly that I didn't have enough money to find the problem. I agree with AVERN I think this was some kind of glitch in some of the T100s. I have owned 4 and now looking for #5 I have always come out good on buying a T100 driving it for a year or 2 and then selling them.This was the first time I had one that shook like crazy and hope its the last.