06-09 YAMAHA YZ250F As an industry leader in seat technology, SDG works with the fastest Supercross, Motocross, and off-road racers to develop products that not only look great on your bike, but offer you the same performance features used by the pros. All seats feature: Complete seat, ready to install (lighter than stock). Water-resistant, closed-cell foam (reduces foam breakdown). Durable, 2-stage gripper seat cover with double-stitched, nylon-taped seams. Replaceable brackets on most models.