2002-2006 Yamaha YFR450FAR Service Manual LIT-11616-16-01, Page 260Get this manual
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REAR AXLEFINAL DRIVE GEAR AND DRIVE SHAFT
Ring gear shim Thickness (mm) 0.25 0.40 0.30 0.45 0.35 0.50
Thrust washer selection 1.Measureselect: Ring gear thrust clearance "C" Measure