AHL Adjustable Valve Shim Kit 9.48mm O.D. for Yamaha YZ426F YZ426 F 2000-2002 (52pcs) OEM valve shim with high precision,fit the motorcycle perfect High quality carburizing steel material to ensure its durability Package included:52pcs;1 shim of each size from 1.2mm to 3.5mm in 0.05 increments,3.5mm to 4.0mm in 0.1 increments High quality with competitive price,satisfy all your valve maintenance needs Quality Assurance!If you are not satisfied with our products,we accept all of the return,replacement or refund requests