Honda WB20XT2, Manual

Page: 115 / 132

13-4
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CRANKCASE WB20XT2•WB30XT2
CRANKSHAFT/PISTON
REMOVAL/INSTALLATION
Remove the following:
– Fuel tank (page 6-3)
– Flywheel (page 8-4)
– Cylinder head (page 12-3)
– Crankcase cover (page 13-3)
CRANKSHAFT
CONNECTING ROD LOWER
INSTALLATION:
Install the piston Assy. to the cylinder barrel with the mark
(1) on the piston head toward the push rod hole (2) of the
cylinder head.
INSTALLATION:
Set the connecting rod lower with
the oil dipper toward the camshaft.
INSTALLATION:
Install the timing gear (1) of the
crankshaft and camshaft (2) by
aligning the punch marks (3).
PISTON
(Outer surface and big end bearing)
VALVE LIFTER
(Pivot, pivot end and slipper surface)
(Cam journal and profile)
(Big end bearing)
WB20XT2: (7 x 34 mm)
CONNECTING ROD BOLT (2)
(Threads and seating surface)
CAMSHAFT
INSTALLATION:
Be careful not to damage the oil seal lips.
(Pin and gear teeth)
(3)
(1)
(2)
(Cylinder inner surface)
CYLINDER BARREL
REMOVAL:
Mark the valve lifters so that the
intake and exhaust sides can be
distinguished.
INSTALLATION:
Attach the valve lifters to the
cylinder barrel immediately before
installing the camshaft.
WB30XT2: (6 x 34.5 mm)
12 N·m (1.2 kgf·m, 9 lbf·ft)
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)
(1)
(2)