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 - H616-IH-2301 FANTIC XXF450 23-24 YAMAHA YZ450F 23-24 YZ450FX 24- WR450F 24-