YAMAHA YZ 125 250 1997-2007 YZ WR 250 426 450 F 1998-2006 AS3 CHAIN GUIDE BLOCKS year-1985 high pressure race conditions

high pressure race conditions

2004-2023 Yamaha YZ 250 F

2002-2018 Honda CRF 450 R

2021-2023 KTM 450 SMR

YAMAHA YZ 125 250 1997-2007 YZ WR 250 426 450 F 1998-2006 AS3 CHAIN GUIDE BLOCKS year-1985 high pressure race conditionsReplacement blocks to fit AS3 Performance chain guides, made from black hard plastic the blocks are a direct replacement part to fit AS3 Performance chain guides. Please note these blocks are designed for AS3 Performance aluminium chain guides only and will not fit OEM chain guides. Will Fit 1997 2007 Yamaha YZ 125 1997 2007 Yamaha YZ 250 2001 2006 Yamaha YZ 250 F 1998 1999 Yamaha YZ 400 F 2000 2002 Yamaha YZ 426 F 2006 2006 Yamaha YZ 450 F 2001 2006