In 5th at 70 and a 19 tooth I shouldn't have been anywhere near rev limit. I make this ride every day and done that part at 85 when no ones around. Also I was only doing 60 the first time it did it. the way it stops, it's like it was shut down by something. Wait that gives me a thought. the kick stand shut off switch got messed up awhile back while I was in florida. I used a paperclip to by pass it at the headstock connection. I fixed it 6-12 months ago. maybe somethings gone wrong there?