Factory Effex (10-24234 Black All-Grip Seat Cover Fits Yamaha WR250 07-15 / WR450 07-11 The All-Grip seat cover is designed for riders looking for a durable black seat cover with a solid grip Made from the same high-durability Super Grip material as the B4, the All-Grip seat cover gives you complete control in a no-frills package Tall seat covers available for some applications