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ENGINE TOP END 6-33
Cylinder, Pistons
•
The piston ring openings must be positioned as shown in
the figure. The openings of the oil ring steel rails must be
about 30 ∼ 40° of angle from the opening of the top ring.
[A] Top Ring
[B] Second Ring
[C] Oil Ring Steel Rails
[D] Oil Ring Expander
[E] Hollow (Exhaust Side)
•
Replace the cylinder gasket with a new one, and install
the pins [A] and new cylinder gasket.
Exhaust Side [B]
•
Apply molybdenum disulfide oil solution to the cylinder
bore, external of pistons and piston rings.
•
Insert the piston in the cylinder by two methods.
With the Hand
•
Position the crankshaft at #2, #3 piston TDC.
•
Install the two cylinder head bolts [A] diagonally in the
crankcase.
•
Install the cylinder block [B].
Pistons [C]
○
First insert the #2, #3 pistons, and then rotate the crank-
shaft at 90° angle.
○
Insert the piston rings with your thumbs or the thin (–)
screw driver.
With the Special Tools
•
Install the two cylinder head bolts [A] diagonally in the
crankcase.
•
Slip the piston bases [B] under the pistons to hold them
level.
•
Compress the piston rings using the piston ring compres-
sor grips [C] and piston ring compressor belts [D] with
chamfered side upward.
Special Tools - Piston Base, 8: 57001-1604
Piston Ring Compressor Grip: 57001-1095
Piston Ring Compressor Belt,
80 ∼ 91:
57001-1320
•
Push down vigorously the cylinder aligning the cylinder
bores with all the piston heads.
•
Install the cylinder so that its angle aligns the piston angle
after removing the piston ring compressor belts.
•
Install the removed parts.