1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 407Get this manual
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TROUBLESHOOTING
.Abnormal-Clutch slippin Worn clutch discsplates Warped clutch discsplates Weak clutch spring Additive lj'l engine oil
5 Check Ignition timing Incorrect-Faulty ignit