Thanks for all the help. It's an 07 with 10200 miles. I would agree that it might be electrical or fuel related only for the reason that the shifter trick solves everything. I can shift to 5th at 25mph with the shifter trick and the bike runs beautifully. If i shift to 5th at 60 without it, bam, it surges again.
To answer ER's question. If i dont hold the shifter then the bike slows down with lower revs for a moment, then revs back normally, then dies for a split second and on and on...
I looked at those pivot points, I will lube them, though, I can't imagine how that would help the shifter stay up. The only point where I feel if it were tightened, it MIGHT solve the problem is where the shift level meets the frame. This diagram may help:
http://www.cheapcycleparts.com/model_ye ... ies/117625
I am referring to part #35, 37, 38
Also perhaps the return spring may also be too worn? part #31?
Thoughts? Thanks again