17-11-11, 08:38 AM
First call would be a carb synch. Then ride the thing more. 
FWIW, Dave, I've tried foam, sand, lead shot, lead wire, every snake oil solution to damping vibes through the bars (Renthals) and nothing is more effective than heavy bar ends. I've got the Oberon stainless jobbies (now discontinued) but I suggest your best bet is to tap the Renthals to take the original Yamaha bar ends. Those are heaviest of the lot!
FWIW, Dave, I've tried foam, sand, lead shot, lead wire, every snake oil solution to damping vibes through the bars (Renthals) and nothing is more effective than heavy bar ends. I've got the Oberon stainless jobbies (now discontinued) but I suggest your best bet is to tap the Renthals to take the original Yamaha bar ends. Those are heaviest of the lot!