Compression Pressure Check; Compression Test Procedure - Suzuki Vinson LT-A500F Service Manual

COMPRESSION P R E S S U R E C H E C K
The compression pressure reading of a cylinder is a good indicator of its internal condition.
The decision to overhaul the cylinder is often based on the results of a compression test. Periodic mainte-
nance records kept at your dealership should include compression readings for each maintenance service.
WM Compression pressure:
Standard: 800 kPa (8.0 kgf/cm
(Automatic decompression actuated)
Low compression pressure can indicate any of the following conditions:
* Excessively worn cylinder walls
* Worn piston or piston rings
* Piston rings stuck in grooves
* Poor valve seating
* Ruptured or otherwise defective cylinder head gasket
NOTE:
When the compression pressure goes below specification, check the engine for conditions listed above.
COMPRESSION T E S T P R O C E D U R E
NOTE:
• Before testing the engine for compression pressure,
sure that the cylinder head nuts are tightened to the speci-
fied torque values and the valves are properly adjusted.
• Warm up the engine before testing.
• Make sure that the battery is fully charged.
Remove the related parts and test the compression pressure in
the following manner.
• Remove the spark plug.
• Install the compression gauge and adaptor in the spark plug
hole. Make sure that the connection is tight.
• Keep the throttle lever in the fully open position.
• Press the starter button and crank the engine for a few sec-
onds. Record the maximum gauge reading as the cylinder
compression.
09915-64510: Compression gauge set
09915-63310: Adaptor
2 ,114 psi)
2-6)
PERIODIC MAINTENANCE
make
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