My bike shifted hard from 1st to 2nd gear as long as I owned it. I thought of purchasing the factory pro star and some of the other things reccommended by other owners. This is what I noticed the shifter seemed sloppy on the pivot stud by foot peg. I tightened the stud and now my bike shifts like it's a new trans in it. For those with the problem check tightness on your pivot stud if lose tighten it. Take 5 mins. and it's free.