1991-1993 Yamaha Exciter II-570 Service Manual, Page 267Get this manual
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_ _ CLUTCH TUNING CLUTCH TUNING
Part Number Color Code Pre-loadSheave Spring: Spring Rate
90501-521J6 G-P-G 30 kg (66 Ib) 1.5 kgmm (15 Nmm, 84 Ibin) 85.4 mm (3.36 in)
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