Honda GP160H, Manual, Page: 36 / 114

3-7
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MAINTENANCE
VALVE CLEARANCE CHECK/
ADJUSTMENT
Inspect and adjust the valve clearance while the engine
is cold.
CHECK
Disconnect the spark plug cap [1] and remove the
following:
– Breather tube [2]
– Head cover bolt (6 x 12 mm) [3] (4)
– Head cover [4]
– Head cover packing [5]
Set the piston near top dead center of the cylinder
compression stroke (both valves fully closed) by pulling
the recoil starter slowly. When the piston is near top
dead center of the compression stroke, the triangle
mark [1] on the starter pulley [2] will align with the top
hole [3] on the recoil starter case [4].
If the exhaust valve is open, use the recoil starter to turn
the crankshaft one additional turn and align the triangle
mark with the top hole again.
Insert a feeler gauge [1] between the valve rocker arm
[2] and valve stem [3] to measure the valve clearance.
If adjustment is necessary, proceed as follows.
[4] [1] [2]
[3] [5]
VALVE CLEARANCE:
IN: 0.15 ± 0.02 mm (0.006 ± 0.001 in)
EX: 0.20 ± 0.02 mm (0.008 ± 0.001 in)
Pull slowly.
[2] [4]
[3] [1]
[2]
[3]
[2] [3] [1]