KTM 125 150 250 300 350 450 500 SX SXF EXC XC XC-W XC-F XCF-W AS3 FACTORY REAR SPROCKET 520 51T BLACK colour-white 1989-2004 Yamaha YZ 250

1989-2004 Yamaha YZ 250

2014-2025 KTM 250 SX

2006-2016 Kawasaki ER6 N

1996-2001 Yamaha TRX 850

KTM 125 150 250 300 350 450 500 SX SXF EXC XC XC-W XC-F XCF-W AS3 FACTORY REAR SPROCKET 520 51T BLACK colour-white 1989-2004 Yamaha YZ 250AS3 Performance Factory Series rear sprockets combine the strength of steel and the light weight of aluminium to give you the ultimate hard wearing rear sprocket. The outer ring is manufactured from hardened steel with a nickel coating and will outlast an aluminium sprocket by up to 3 times. The inner ring is constructed from aircraft grade 7075 T6 aluminium and is up to 50% lighter than a standard steel sprocket. Details Teeth: 51 Chain: 520 Will Fit