Ya know as i was reading bobs reply, that thought popped into my head, the old bsa trick. Sh@! it's wortha try! Bob no I have not tried it,but will now.
Yes bob I have. up down and in the middle.I am not with the bike right now, but presently I believe it's set at center.
Fork legs are now filled with 20 wt fork oil,(also have tried 10 and 15wt) to the volume in the service manual..
Is it possible that these motors have shims, or a motor plate missing or misaligned?
Throttle responce is also a factor with this oscillation, or can induce it. And, no I'm not finger tipping the bars on the highway.Just trying to rule all out.
Thanks bob, Dan.
Dan:
Looks like the thread is moving forward in a positive direction. To help it along, how about if you list the things you have tried and what was the result. Also list the ideas or any thought that you have not tried yet.
Based upon what I have read in the thread I have compiled the list below. By eliminating one by one, you may find the source of problem. Add more as you keep up with your search.
1. Rear shock adjustment - Tried, but no improvement.
2. Wheels balanced - Tried, but no improvment.
3. Fork oil replaced with different weight - Tried, but no improvement.
4. Old BSA trick - Not tried yet.
5. Throttle can induce vibrations - If old BSA trick does not fix it, then the interior of the engine may need further investigation.
6. Just to rule out - wheel alignment and typre pressure ??
7. Swing arm bush ?
8. Steering Head bearings ??