Check the listing for details. COMPLETE Upper and Lower S.S. Blaster YFS200 Shock Conversion Kit HPM Powersport. Condition: New. Listed at 31.00 USD. Formerly KOR now HPM Yamaha Blaster YFS200 88-06 Rear Shock Conversion Bushings with Hardware. These were designed and originated by KOR Ken Oconnor Racing. He handed us the torch and we started mass producing these. Included are Upper AND Lower hardware. These rear shock conversion bushings are designed to be able to use KFX400, LTZ400, 400EX, TRX250, TRX450, ATC250 and YFZ450 shocks and you may have to drill the bottom of the shock to 12mm to fit the bottom 12mm pin. DO NOT USE A BOLT ON THE BOTTOM OF THE SHOCK! These are pickled and Oiled Steel Bushings and include SS Bolt, Nylock, and Washers. Do not use the Chinese poly, or copy cat aluminum Bushings, they will not hold up properly and can cause a dangerous scenario.