Honda NSS250S Manual page 315

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Install the dowel pins and a new gasket onto the cyl-
inder.
Route the cam chain through the cylinder head and
install the cylinder head onto the cylinder.
Install new cylinder head 9 mm bolt/washers.
Tighten the 9 mm bolt/washers in a crisscross pat-
tern in two or three steps to the specified torque.
TORQUE: 38 N·m (3.9 kgf·m, 28 lbf·ft)
Tighten the cylinder head 6 mm bolts.
Tighten the cylinder bolts.
Connect the water hose to the cylinder head.
Coat new O-rings with oil and install them to both
side grooves of the insulator.
Install the insulator between the intake pipe and cyl-
inder head.
CYLINDER HEAD/VALVES
DOWEL PINS
9 mm BOLT/WASHERS
6 mm BOLTS BOLTS
WATER HOSE
O-RINGS
GASKET
CYLINDER HEAD
INSULATOR
9-21