Factory Effex Black All-grip Seat Covers Fits CR125/250 00-08, CRF450 02-04. 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.