1991-1993 Yamaha Exciter II-570 Service Manual, Page 425Get this manual
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MAINTENANCE SPECIFICATIONS POWER TRAIN
87X-17641-00 (DAYCO) 1,1181,128 mm (44.044.4 in) 35.0 mm (1.38 in) 32.0 mm (1.26 in) 89L-17641-00 (MITSUBOSHI)
V-Belt: Part Number Outside Cir