Okay, I noticed increasing vibrations on my bike after I replaced the engine and that lead me to find and replace the front engine mount which had deformed. Right after replacing the mount, I noticed the vibrations had changed. It would seem they are still there, but now at different RPM ranges. I attribute some of it to a new, stiff mount that needs broke in, but I'm not so sure that's it. The last thing I did to the bike before the mount was to adjust the primary chain looser as it was one ridge on the adjuster too tight according to what the manual calls for. I am wondering if maybe I need to re-adjust the primary back where it was? Maybe check the rear mount? Check the compensator nut? Similar to another thread on here, it seems possibly worse on deceleration and at idle and will vibrate the whole fairing around 2000 rpm. Am I being paranoid about a brand new, stiff mount or is something else possibly going on?

 

When adjusting your primary turn things over carefully (by hand, not using the starter!) to find the tightest spot in the chain. If your chain is a little too tight that may explain your vibration. Not for certain, but as you mention it, worth checking.

 

Just opened the primary to check everything out. The compensator nut was still tight, I removed and re-installed it with my impact to be sure. Everything else in these looked fine. I inspected the compensator and found no cracks or deformity, the chain looks good and the teeth looked good. I re-adjusted the chain one ridge tighter, seems like there is a ridge right where I want to adjust it to, on the loose side of that ridge the chain has deflection at the large end of the scale(still within spec, but right at the upper end of spec) and at the tight side of the ridge the deflection is at the small end of spec. I had it set there initially and for about 1500 miles then changed it to the loose side of the ridge for about 5-600 miles. Now I have it set back on the tighter side again.

The rear mount area looked okay as well, I didn't see any obvious rubber deformity or wear. Am I just being paranoid about a brand new, stiff mount? Please help! I can use some more experienced wisdom on this...

 

Check all the attaching points of the exhaust system and see if a clamp is broken or if some adjustments are needed. Had a broken clamp on my RK that was causing a wicked vibe...

 

Everything on the exhaust is nice and tight... No broken clamps or hangers.

 

I had a similiar experience with my 95 EG after removing the motor mount to change cylinder base gaskets. When the bike was back together I noticed considerbly more vibration at lower RPM's. Did some checking iin my service manual and found out the motor mount bolt has to be torqued (45 ft. lb. IIRC). I just tightened it up when I put it back in. I backed it off and torqued it........harsh vibration was gone! Hope this helps.

 

Thanks. I had overlooked the torque spec when swapping the mount. I backed it off, set the torque wrench to 41 ft/pounds and tightened it to the click. One question though, the torque spec seems tighter than I had it; not by much, but could it have actually been too loose? When you did yours, was torque spec tighter or looser than you had it when you had the vibrations? BTW my book calls for 35-45 ft/pounds on the mount center bolt, that's why I set it to 41.

 

I'm pretty sure I had mine tighter than it was supposed to be. I think having it too tight or too loose may cause excessive vibration?

 

Well when I torqued it, I used a cheapo 3/8" drive wrench that I had recently gotten from Harbor Freight, and this was the first use of that wrench. The markings are not that clear and I think it was a little tight before it clicked. I just went and re-torqued it with my 1/2" drive wrench that I have used a few other times and it seemed more accurate. Tonight's ride will tell if it made a difference.

Today is the first nice day we've had in a while that I wasn't working, so I intend to take advantage of it!

 

Was the rotating assembly in that new motor balanced by someone your trust?