Reviving an old, but very useful thread. I'm in the same boat, excessive vibrations, and I'm mid-way thru the alignment and "Fix" process.
Note: both isolators and the stabilizer were replaced by a shop a month ago. I have had excessive vibration for a while now, most of it was caused by a faulty ignition module, which I've replaced also. Prior, the vibes were at all rpms all the time. Now that the module is good, vibes are mostly at accel and decel. I can get her to settle into a smooth run by varying the engine speed. Off idle I can slowly increase the rpms and the vibes are very noticable as I do this up to a point. Everything shakes in this range, but as I exceed it, it smooths out.
I have my bike level and plumb and I've checked my front isolator and found about 2 washers worth of gap on the top bolt only. To shim it properly I'd need a wedge shape, but for now I have placed two washers in the gap on the top bolt and snugged both of them down. The rear is untouched as of yet. This was my first step.
I then lifted my tank to inspect the stabilizer. I removed the bolt as the FSM said to, and it was difficult to get out. There was a lot of tension on it. This is what it looks like when at rest...
The photo shows it's natural position with tension off of the stabilizer. As you can see, the eye is rearward of the hole it should go in, and also inward. Seems this is under stress all the time when the bolt is installed.
With the stabilizer disconnected my front brake disk is perfectly vertical, the rear one is almost perfect.
So, it seems I need to adjust this stabilizer so it's not under stress. Question is, how? The image in my FSM is of a different year bike, a 1995 I'd say, cuz my stabilizer is slighly different than what's pictured.
Looking into the photo, which "nuts" should I mess with? Seems from near to far there is the isolator, then a nut, then another nut, then another nut, then the other side of the isolator. It's not clear to me which I'm to loosen, and which I am to adjust.
Also, it seems I should loosen the nut holding the stabilizer to the frame on the carb side so I can angle the stabilizer just a bit towards the front, so it's not stressing the bushing in the stabilizer.
Any advice from the experienced would be helpful. I may need to remove my washers so the front isolator is in it's original position, then re-check the stabilizer. It seems all out of whack, tho the bike tracked straight before I messed with any of this stuff. Seems odd the stabilizer has so much stress on it though and could very well explain the vibes I'm having.
EDIT: This Just In...
The front pipe is hitting the frame with the top stabilizer bolt disconnected. This is bad and now I'm wondering if my vibration was the pipe hitting the frame under load to begin with. Could the rear isolator be installed upside down by any chance? I didn't change it so I don't know. The front is obviously a one-way install kinda thing.
I put the stabilizer bolt back in and didn't adjust anything, mainly cuz I couldn't get it to adjust, which is probably a good thing. When I unblocked the bike and rest it on the jiffy stand, the front pipe no longer was touching the frame. It's a tight squeeze there, but it doesn't touch.
Seems the way I had the bike shored upright was the problem. I'll spare the details, but just call me numbnutz for now.