2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 131Get this manual
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CLUTCH Install new lock: washer
07HMB HB10100
07923-HB3000B (U.S.Aonly} TORQUE: 88 Nm (9.0 kgfm, 65 Ibf.ft}
Stake the lock nut into the front crankshaft groove