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Valve Clearance
(cont’d)
Servicing Your Honda 83
1. Remove the timing hole cap (1) and crankshaft
hole cap (2).
2. Remove the spark plug (page 81).
3. Remove the cylinder head cover (page 82).
4. Rotate the crankshaft by turning the flywheel
(3) counterclockwise until the matching mark
(4) on the flywheel aligns with the index mark
(5) on the left crankcase cover. In this position,
the piston may either be on the compression or
exhaust stroke at TDC.
If the crankshaft passed the matching mark,
rotate the flywheel counterclockwise again and
align the matching mark with the index mark.
5. Make sure that the decompressor weight (6) is
in the lower position.
Check the timing marks (7) on each cam
sprocket are aligned with the cylinder head
mating surface (8).
1. Set the piston at TDC on the compression
stroke (this page).
2. Measure the valve clearances of each intake
valve by inserting a feeler gauge (1) between
the intake rocker arms (2) slipper surface and
camshaft cam lobes (3).
NOTICE
Be careful not to damage the intake rocker arms.
Valve Clearance:
Positioning At TDC On The
Compression Stroke
(1) timing hole cap (2) crankshaft hole cap
(2)
(1)
(3) flywheel (5) index mark
(4) matching mark
(6) decompressor weight
(7) timing marks
(8) cylinder head mating surface
(5)
(4)
(3)
(7)(7)
(8)
Align
(8)
Align Align
(6)
Valve Clearance Inspection
(1) feeler gauge (3) camshaft cam lobes
(2) intake rocker arms
IN: 0.004 ± 0.001 in (0.09 ± 0.03 mm)
(1)
(2)
(3)
(3)
(1)
(2)
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