hello 65 guys! i´m a dad mechanic just out of the 50 cc class THANK GOD- WE SPENT MY SON´S COLLEGE FUND ON LC 50 CLUTCHES! WE´RE LOOKING FOR ANY TIPS ON 65SX RACE PREP THANKS!ANYBODY HAD TROUBLE WITH THE THREADED CHAIN ADJUSTER INSERT COMING OUT OF THE SWING ARM? IS THERE AN UP GRADE FOR THIS PART? THANKS