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7. CYLINDER HEAD/VALVES ATV 300/250
Crankcase Breather Hose
CYLINDER HEAD COVER
REMOVAL
Remove fuel tank. (Refer to the chapter 5)
Disconnect the crankcase breather hose
from the cylinder head cover.
Remove the four bolts at the cylinder head
cover, then remove the cylinder head cover.
Cylinder Head Cover Bolts
O-ring
INSTALLATION
Install a new cylinder head cover O-ring
and install the cylinder head cover.
Install and tighten the cylinder head cover
bolts.
Torque: 1 kgf-m ( 10 Nm, 7.2 lbf-ft)
Be sure to install the O-ring into the
groove properly.
CAMSHAFT/CAMSHAFT Bolt
HOLDER
REMOVAL
Remove the cylinder head cover. (Refer to
the cylinder head cover removal)
Remove the cam chain tensioner cap bolt
and the O-ring.
Tensioner Screw
Turn the cam chain tensioner screw
clockwise to tighten it.
7-4