Factory Effex B4 Yamaha YZ450F Seat Covers are track tested and are the number one seat choice of the pros. Super Grip material of the Factory Effex B4 Seat Cover keeps you in the seat, for a more stable ride. Factory Effex B4 Seat Covers are the upgrade to the best-selling B3 cover. Factory Effex B4 Yamaha YZ450F Seat Covers give your bike that extra something that only true champions have.
Toughest Seat Cover on the Market
Heavy Duty Grip Pattern Material
Ballistic Reinforced Knee Area
Optional BUMP for increased control