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MAINTENANCE AND ADJUSTMENT OF THE UTV
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CHECKING THE IGNITION TIMING
NOTE
before checking the ignition timing, adjust the
engine’s racing speed and throttle cable.
1. Remove:
driver seat
passenger seat
console
Refer to “SEATS” in chapter 5.
2. Lift the cargo bed up.
3. Attach:
Engine tachometer
(to the spark plug lead)
4. Remove:
Refer to remove manual starting mechanism
、
、
name
5. Check:
Engine tachometer
a. worm up the engine at specified speed
Engine speed
1,400 ~ 1,500 r/min
b. Remove Ignition signal sensor
c. Visually check the stationary pointer
to verify it
is within the required firing range
indicated on the
flywheel.
Incorrect firing range
Check the pulser coil
assembly.
d. Install the timing plug.
6. Install:
Engine manual starting mechanism
7 Nm (0.7 m · kg, 5.1 ft · lb)
7. Install:
manual starting mechanism cover
10 Nm (1.0 m · kg, 7.2 ft · lb)
8. Detach:
timing light
9. Lower the cargo bed.
10. Install:
MAINTENANCE AND ADJUSTMENT OF THE UTV
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console
passenger seat
driver seat
Refer to “SEATS” in chapter 5.
MEASURING THE COMPRESSION PRESSURE
NOTE
Insufficient compression pressure will result in
a loss of performance.
1. Start the engine and let it warm up for several
minutes.
2. Stop the engine and remove the spark plug.
3. Assemble the compression pressure meter
and joint utensil
on the hole of the spark plug
4. check
valve clearance
Out of specification
Adjust. Refer to “ADJUSTING
THE VALVE CLEARANCE”
standard value
standard compression pressure data
1200Kpa (12kg/c)-1000r/min
5. read the highest data on the compression
pressure meter
Above the maximum pressure:
Check the cylinder head, valve surfaces, and
piston crown for carbon deposits.
Below the minimum pressure:
Check the accumulation carbon in the firebox of
the cylinder head and accumulation carbon on the
piston head.
Refer to the table below.
Compression pressure(with oil introduced into
cylinder)
Reading Diagnosis
Higher than
without oil
Worn or damaged pistons
Same as without
oil
Defective ring(s), valves,
cylinder head gasket or
piston is possible.
Compression pressure
(at sea level)
Standard: 1,324Kpa
(13.24 kg/cm2, 188.31Psi)
Minimum: 1,150Kpa
