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POWR
Power unit (check and
adjustment)
Checking the compression pressure
1. Start the engine, warm it up for 5 min-
utes, and then stop it.
2. Remove the clip from the engine shut-off
switch.
3. Disconnect the spark plug caps, and then
remove
the
spark
Before removing the spark plugs,
remove any dirt or dust in the spark
plug wells that may fall into the cylin-
ders.
4. Install the special service tool 1.
1
Compression gauge 1: 90890-03160
5. Fully open the throttle.
6. Crank the engine until the reading on the
compression gauge stabilizes, and then
measure the compression pressure.
Minimum compression pressure
(reference data):
750.0 kPa (7.50 kgf/cm
at 20 °C (68 °F) (manual starter model)
870.0 kPa (8.70 kgf/cm
at 20 °C (68 °F) (electric starter model)
TIP:
When pulling the starter handle to crank the
engine, the compression pressure may vary
depending on the speed at which the starter
handle is pulled. (Manual starter model)
7. Remove the special service tool.
7-1
Power unit
plugs.
NOTICE:
2
, 108.8 psi)
2
, 126.2 psi)
8. Install the spark plugs, and then connect
the spark plug caps.
Checking the oil pressure
1. Remove the oil pressure switch, and then
install an oil pressure gauge 1.
1
Oil pressure gauge 1:
(commercially available)
2. Start the engine and warm it up until the
idle speed gets stable at 925–1025 r/min.
3. Measure the oil pressure.
Oil pressure (reference data):
250.0 kPa (2.50 kgf/cm
60 °C (140 °F) with SL 10W-30
engine oil and at 950 r/min
TIP:
The actual oil pressure may vary depending
the temperature and viscosity of the engine
oil being used.
4. Stop the engine.
5. Remove the oil pressure gauge, and then
install the oil pressure switch.
Oil pressure switch:
8 N·m (0.8 kgf·m, 5.9 ft·lb)
Checking the pulser coil air gap
1. Remove
the
"Removing the manual starter" (7-7).
(Manual starter model)
Remove the flywheel magnet cover.
(Electric starter model)
2
, 36.3 psi) at
manual
starter.
See
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