2006 Honda TRX680 Rincon Factory Service Manual, Page 218Get this manual
CYLINDER HEADVALVECAMSHAFT
CAMSHAFT
REMOVAL
Remove the cylinder head (page 9-9)Remove the sealing bolt and washer on the cam chain tensioner lifterInstall the special tool so its blade is into the tensioner lifter and the tabs are just above the slots in the lifter (there should be space between the bottom of tool and lifter body)Then turn the tool clockwise until it stops turning and engage the tabs with the slots (the lifter shaft is fully secured with the special tool)TOOL: Tensioner holder 07ZMG-MCAA400 or 07AMG-001A100 (U.S.Aonly)
Remove the four camshaft holder boltsSuspend the cam chain with piece of wire to prevent it from falling into the crankcase
Raise the holder plate so the dowel pins fitted in the camshaft holders are removed off the cylinderRelease the cam chain from the cam sprocket to remove the camshaft assembly and holder plate