7. CYLINDER HEAD/VALVES MXU 250R/300R
ASSEMBLY
Install the valve spring seats and oil seal.
Be sure to install new oil seal.
Lubricate each valve with engine oil and
insert the valves into the valve guides.
Install the valve springs and retainers.
Compress the valve springs using the valve
spring compressor, then install the valve
cotters.
· When assembling, a valve spring
compressor must be used.
· Install the cotters with the pointed ends
facing down from the upper side of the
cylinder head.
Special tool:
Valve Spring Compressor E040
Tap the valve stems gently with a plastic
hammer for 23 times to firmly seat the
cotters.
Be careful not to damage the valves.
Gasket
INSTALLATION
Install the dowel pins and a new cylinder
head gasket.
Reverse the "CYLINDER HEAD
REMOVAL" procedures.
After camshaft holder is installed and
tighten the nuts, then tighten cylinder head
bolts.
Torque:
Cylinder head bolt: Dowel Pins
1 kgf-m (10 Nm, 7.2 lbf-ft)
7-13
RAS 
4.7 / 5