Guide Stopper (Front Cam Chain Guide Bar). OEM Ref.# 256-12231-01.

When black plastic bits start showing up in your oil its usually from the guide bar breaking up due to heat & old age. Replace it as the cam chain will next start to saw its way thru the aluminum support.

Fits: All TX/XS 650’s 1970-84

Part #05-0006 $25.20 Ea.