Suzuki GW250 Service Manual page 80

3-32 ENGINE
• Insert the valve, with its stem coated with molybdenum oil
solution all around and along the full stem length without any
break.
When inserting the valve, take care not to damage the
lip of the oil seal.
 MOLYBDENUM OIL SOLUTION
• Install each valve spring with the small-pitch portion A facing
cylinder head.
• Compress the valve spring using the special tools.
Compressing of the valve spring must be limited to
the extent only necessary to prevent the spring from
fatigue.
 09916-14510: Valve lifter
09916-14910: Valve lifter attachment
• Install the cotter halves 3.
Check that the rounded lip E of the cotter is securely fit-
ted in the groove F in the valve stem end.
NOTE:
To facilitate assembly, apply a little grease to the valve cotter
when fitting into the valve stem groove.
 09916-84511: Tweezer
• Fit the new gasket 4 to each oil gallery plug 5.
• Tighten the oil gallery plugs 5 to the specified torque.
 Oil gallery plug (Cylinder head):
A Small-pitch portion
B Large-pitch portion
C UPWARD
D Paint
10 N·m (1.0 kgf-m, 7.0 lbf-ft)