1999-2002 TRX400EX Fourtrax Service Manual, Page 52Get this manual
MAINTENANCE Major adjustments are made with the lower adjusting nut at the engineLoosenthe lock nut and turn the adjusting nutAfter adjustment is complete, tighten the lock nut securely while holding the adjusting nutCheck the clutch operationIf the free play cannot be obtained, or the clutch slips during test ride, disassemble and inspect the clutch (section 9)ADJUSTING NUT
SUSPENSION
For detailed instructions on adjusting preload and damping setting, see Owner's Manual
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Loose, worn or damaged suspension parts impair vehicle stability and controlRepair or replace any damaged components before ridingRiding TV with faulty suspension increases your risk of an accident and possible injury