1999-2004 Honda TRX400EX FourTrax Service Manual, Page 93Get this manual
CYLINDER HEADVALVE Remove the following:thrust washerone-way clutch (clutch outer, rollers and springs)reverse decompressor cam -stopper pindecompressor camspring
RSE DECOMPRESSOF
INSPECTION
Check the one-way clutch outer, rollers and springs for wear or damageCheck both cams for wear or damageCheck the cam's sliding surface on the camshaft for scoring or wearWASHER
ONE WAY CLUTCH
CAM SPROCKET FLANGE
DECOMPRESSOR ASSEMBLY
DECOMPRESSOR CAM Lubricate the cams, one-way clutch and washer, Install the spring into the camshaft hole, then install the decompressor cam while holding the springAssemble the reverse decompressor cam and clutch outer with the stopper pin and install the assembly onto the camshaftSPRING