I was watching a couple of the bikes at the track and then I had to listen to what a piece of gold they are for the track.. One thing I do know is that on the Putnam track, do not need it.. (can run the entire track in 3rd gear except for the long straight were you can top out in 5th gear.. so a total of 4 shifts per lap
figured if I could find one on one of my super long deals, i would get it anyway..