Originally Posted by Airhead Wrangler
I'm still betting this is mixture or ignition related, it's something worth eliminating. You said you tried several sets of plug wires, but did you try different caps as well?
Yup. Each cable has different caps. 1 set was brand new out of the box, stock. Another set was from the r75 with 19k miles and another set was the euromoto high resistance set.