I have a T140E 1980 with spoked wheels. I’m getting a shake from the front wheel, I fitted stainless rims and used the original spokes. Wheel was trued, no wobble, not oval, all spokes tensioned, fitted an Avon
Road Rider 100/90 19”. Set wheel up on axle stands and balanced with spoke weights.
From about 35 to 55 MPH it shakes, above that speed smooth,
Pulled the forks apart and checked all the internal components and order with the genuine workshop and parts books, reassembled with SAE5 fork oil and 1” spacers on the springs. Forks are not sticking and work smoothly.
Still the same from about 35 to 55 MPH it shakes, above that speed smooth,
Fitted a Vee Rubber VRM191 100/90 19” tyre at 28PSi, balanced tyre, now it shakes from 30 to 42 MPH, when you get to 50 MPH and above it’s smooth.
My last bike was a 1972 TR6, I fitted stainless rims, new tyres, balanced tyres, trued wheels and all that, no problem, no shakes just smooth at any speed, so I have done all this before and on other bikes as well. I know the change of tyre altered the vibration period which points back to balance but as I ‘ve said I have balanced wheels before with no problems so what’s happening here?
Can any one tell me what I am missing or do I just live with it as it’s not un-ridable.
Thanks in advance, Steve.