1999-2004 Honda TRX400EX FourTrax Service Manual, Page 158Get this manual
CRANKCASEITRANSMISSIONlCRANKSHAFT Install the cam chain drive sprocket onto the crankshaft, aligning the wide groove with the wide tooth
Install the cam chain onto the drive sprocket and through the crankcaseApply locking agent to the cam chain tensioner bolt threadsInstall the washer (between the crankcase and slider), tensioner sliderlcollar and bolt, and tighten the bolt securelyInstall the following: -primary drive gear, clutch, gearshift linkage (section 9)piston and cylinder (section 8)cylinder head (section 7) oil pump (section 4)flywheel(section 10)starter motor (section 18)engine (section )