Hello. I'm new to the forum. In fact, this is my first posting on any forum. I joined in order to address your problem as I've recently had very good luck solving the same problem on my bike. I ride a 2000 KLR650 and was having front end wobble at 70mph. Everyone was pointing to the very aggressive knobbies I had recently installed, but I wasn't buying it. I'm wondering whether you have hand guards on your bike? I have aftermarket "bark buster" metal hand guards and had recently installed Cycra plastic guards. As it turns out, the plastic guards catch wind and cause buffeting (and resultant frightening wobble) at higher speeds. I removed the plastic (and left the metal hand guards in place). Problem solved. I don't know whether you have this setup. If so, this is worth a try. Hope this helps. Good luck. Ride safe.