1999-2004 Honda TRX400EX FourTrax Service Manual, Page 47Get this manual
MAINTENANCE
DRIVE CHAIN
CHAIN SLACK INSPECTION
Never inspect and adjust the drive chain while the engine is running
Turn the ignition switch OFF, shift the transmission into neutralCheck the slack in the drive chain upper run midway between the sprocketsDRIVE
CHAIN SLACK 3040 mm 11-14- 1-58 in1
ADJUSTMENT