1999-2004 Honda 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 discolorationMeasure the clutch disc thickness
SERVICE LIMIT 2.69 mm 10.106 in)
Replace the clutchdiscsand plares as set
CLUTCH PLATE
Check the plates for discolorationCheck the plate warpage surface plate using feeler gauge
SERVICE LIMIT 0.15 mm 10.006 in)