CHAPTER 3A ENGINE 260/ 300 / 400 cc ATV SERVICE MANUAL09.0
CHAPTER 3 ENGINE PAGE. 3A- 13
If it is below the minimum pressure →
Squirt a few drops of oil into the affected cylinder
and measure again. Follow the table below.
Compression pressure
(With oil applied into cylinder)
Reading Diagnosis
Higher than
without oil
Worn or damaged pistons
Same as
without oil
Possible defective ring (s),
valves,
cylinder head gasket or
Piston →Repair.
Compression pressure(at sea level):
Standard:
1,400 kPa (14Kg/cm
2
, 14 bar)
Minimum :
1,120 kP a (11.2 kg /cm
2
,
11.2 bar)
Measurement steps :
zCrank the engine with the throttle wide open until
reading on the compression gauge stabilizes.
WARNING :
Before cranking the engine, ground all spark plug
leads to prevent sparking.
8. Install:
z Spark plug
3.2.5ENGINE OIL LEVEL INSPECTION
1. Start the engine and let it warm up for a few
minutes .
2. Turn off the engine.
3. Inspect: (Do not thread dipstick in)
zEngine oil level
Oil level should be between maximum and
minimum marks “2” .
Oil level is below the minimum mark Add oil up
to the proper lever.
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