1999-2002 TRX400EX Fourtrax Service Manual, Page 108Get this manual
CYLINDER HEADVALVE CYLINDER HEAD COVER INSTALLATION Apply molybdenum oil solution to the slipper surfaces of the rocker arms and sub-rocker arms
: SLIPPER SURFACES
Clean the mating surfaces of the cylinder head and head coverPour engine oil intothe oil pocketinthe cylinder head
The crankshaft should be turned only counterclockwiseThis must be done to prevent the one-way decompressor system functioning