G'day batman, I am clutching at straws here, but, it may be worth a try. In remembering one of zombie's posts, he spoke of the cdi derestriction being a short, and in running in that rev range you risk burning out the cdi. If you are running your stock one with the rev limiter bridge in place, I wonder if it would be worth removing it for a test run, just to see what happens. I realise it may well be something else but as it costs no money it may be worth trying. If it doesn't change, at least you haven't spent any money and you can rule that out as a possible cause. as I said, it may not be it, but maybe worth a try, just thinking.
