BETA 250 350 400 450 498 520 RR 2005-2012 AS3 FACTORY REAR SPROCKET 520 48T BLACK year-1988 54012-0149 also fits 54012-0139

54012-0149 also fits 54012-0139

2006-2007 KTM 200 XC

1988-2001 Honda CR 500 R

2006-2013 KTM 250 XCF-W

BETA 250 350 400 450 498 520 RR 2005-2012 AS3 FACTORY REAR SPROCKET 520 48T BLACK year-1988 54012-0149 also fits 54012-0139AS3 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: 48 Chain: 520 Will Fit