Linhai ATV 260 Service Manual page 48

CHAPTER 3A ENGINE
NOTE :
Insufficient compression pressure will result in
performance loss.
1. Check:
Valve clearance
Out of specification
Refer to "CALCE CLEARANCE ADJUSTMENT"
section.
2. Start the engine and let it warm up for several
minutes.
3. Turn off the engine.
4. Remove:
Spark plug
Before removing the spark plug, use com
pressed air to blow away any dirt accumulated
in the spark plug well to prevent it from falling
into the cylinder.
5. Attach:
Compression gauge
6. Measure:
Compression pressure
If it exceeds the maximum pressure allowed→
Inspect the cylinder head, valve surfaces and
piston crown for carbon deposits.
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
Higher than
without oil
Same as
without oil
Compression pressure(at sea level):
Standard:
1,400 kPa (14Kg/cm
Minimum :
260/ 300 cc
Adjust.
Diagnosis
Worn or damaged pistons
Possible defective ring (s),
valves,
cylinder head gasket or
Piston →Repair.
2
, 14 bar)
ATV SERVICE MANUAL07.0
CHAPTER 3 ENGINE PAGE. 3A- 11