WHILE DOWN SHIFTING MY MOTORCYCLE IN A CURVE, THE TRANSMISSION MISSED 2ND GEAR AND SLAMMED INTO FIRST GEAR CAUSING THE REAR TIRE TO LOCK UP. LOSING CONTROL OF MOTORCYCLE. I RAN OVER A CURB BENDING BOTH RIMS AND DAMAGING MY BELT DRIVE. THE PROBLEM HAS HAPPENED APX 10 TIMES BEFORE BUT NEVER THIS SEVERE.*AK