1999-2002 TRX400EX Fourtrax Service Manual, Page 127Get this manual
CLUTCHGEARSHIFT LINKAGE CLUTCH DISC
Replace the clutch discs and plates as set
Check the clutch discs for signs of scoring or discolorationMeasurethe clutch disc thickness
SERVICE LIMIT 2.69 mm 10.106;nl
CLUTCH PLATE
Replace the clutchdiscsand plates as set
Check the plates for discolorationCheck the plate warpage on surface plate using feeler gauge