I'm wrong the timing is real close to the "F" mark. It isn't the timing. If you are willing I would like to ship the front and rear varator along with a puller. If you would compare it to the others you have to see if there is an obvious difference I would greatly appreciate it. Otherwise the PA is going to drift back to the back of the pile of part bikes, which I would really upset me. I love the PA50 style and ride (if it went over 18 mph).