1991-1993 Yamaha Exciter II-570 Service Manual, Page 266Get this manual
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_ _ CLUTCH TUNING CLUTCH TUNING
Part Number Color Code Pre-loadSheave Spring: Spring Rate
90501-553G6 W-Y-W 25 kg (55.1 Ib) 2.25 kgmm (22.5 Nmm, 126 Ibin)
90501-