Operation CHARM: Car repair manuals for everyone.

Cylinder Head Assembly

Combustion Chamber Volume 52 cc
Valve Arrangements (Front-to-Rear)
P = Primary, S = Secondary, E = Exhaust
LH Intake S-P-S-P-S-P
LH Exhaust E-E-E-E-E-E
RH Intake P-S-P-S-P-S
RH Exhaust E-E-E-E-E-E
Cylinder Head Bolts
Cylinder head retaining bolts must be replaced with new bolts. They are torque-to-yield designed and cannot be reused or damage to engine may occur.
Step 1 37-43 Nm (28-31 ft.lb)
Step 2 Rotate 85-95°
Step 3 Loosen bolts a minimum of 1 full turn
Step 4 37-43 Nm (28-31 ft.lb)
Step 5 Rotate 85-95°
Step 6 Rotate additional 85-95°
Head Gasket Surface Flatness Cylinder Block ---
0.025/25 mm x 25 mm 0.050/150 mm x 150 mm
Cylinder Head ---
0.025/25 mm x 25 mm 0.050/150 mm x 150 mm
Head Gasket Thickness 1.0 mm (0.40 in)
Head Gasket Surface Finish 1.5 mm RA Maximum (Microns)
Cylinder Head Camshaft Journal Cap Bolts 71-106 in.lb