1991-1993 Yamaha Exciter II-570 Service Manual, Page 246Get this manual
IIANOSJP Ito) DRIVE V-BELT 2E141
POWER TRAIN
DRIVE V-BELT
WARNING
Be sure there are shims (2 pcs) CD between secondary fixed and sliding sheaves when installing the NEW belt Ifthere is no gap, the clutch engagement speed will be reducedThe machine may move unexpectedly when the engine is started The spacer of the secondary sheave should be adjusted