Used by most major factory teams and riders Improves clutch performance and life Improves heat dissipation Precision machined from billet T-6 aircraft quality aluminium to aerospace tolerances Hardcoated for five times the wear resistance to stock (with proper maintenance) Allows clutch assembly to spin more true creating less heat when clutch is disengaged Helps eliminate clutch chatter when used with Hinson clutch baskets INNER HUB YAMAHA YZ450F 03-22 YZ450FX 16-23 WR450F 03-23 YAMAHA ATV YFZ450X ATV 10-11 YFZ450R ATV 04-16