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54 Servicing Your Honda
2. Measure the exhaust valve clearance by
inserting a feeler gauge (1) between the
exhaust rocker arms (4) and exhaust valve
shims (5).
(1) feeler gauge
(4) exhaust rocker arms
(5) exhaust valve shims
Valve Clearance:
IN: 0.006 ± 0.001 in (0.16 ± 0.03 mm)
EX:0.010 ± 0.001 in (0.26 ± 0.03 mm)
If intake valve clearance and exhaust valve
clearance need adjustment, see
Camshaft Holder
Assembly Removal
(page 55) and select the
correct shim for each valve.
(5)
(1)
(2)
(3)
(1)
(5)
(4)
(1) feeler gauge
(2) valve lifters
(3) intake cam lobes
3. Rotate the crankshaft by turning the primary
drive gear bolt (2) (crankshaft) clockwise until
the punch mark (3) on the primary drive gear
aligns with the index mark (4) on the right
crankcase cover. In this position, the piston may
either be on the compression or exhaust stroke.
If the crankshaft passed the punch mark,
rotate the primary drive gear bolt clockwise
again and align the punch mark with the index
mark.
The inspection must be made when the piston
is at the top of the compression stroke when
both the intake and exhaust valves are closed.
This condition can be determined by moving
the exhaust rocker arms (5). If they are free, it
is an indication that the valves are closed and
that the piston is on the compression stroke. If
they are tight and the valves are open, rotate
the primary drive gear bolt 360° and realign
the punch mark with the index mark.
(2)
(4)
(3)
(2) primary drive gear bolt (4) index mark
(3) punch mark
(5) exhaust rocker arms
Valve Clearance Inspection
1. Measure the intake valve clearance by
inserting a feeler gauge (1) between the valve
lifters (2) and intake cam lobes (3).
Valve Clearance
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