2001 Yamaha YFM660 Raptor Factory Service Manual, Page 180Get this manual

2001 Yamaha YFM660 Raptor Factory Service Manual, Page 180

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SWINGARM AND DRIVE CHAIN 5.Lubricate: Drive chain
6.Check: Drive sprocket Driven sprocket More than 14 tooth wear Replace the drive chain sprockets as setBent teeth Replace the drive chain sproc