Compression Pressure Check - Suzuki GZ250 Marauder Service Manual

COMPRESSION PRESSURE CHECK

The compression pressure reading of the 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
maintenance records kept at your dealership should include compression readings for each mainte-
nance service. COMPRESSION PRESSURE SPECIFICATION
10.0-14.0 kg/cm
142-199 psi
Low compression pressure can indicate any of the following conditions:
* Excessively worn cylinder wall
* Worn piston or piston rings
* Piston rings stuck in grooves
* Poor valve seating
* Ruptured or otherwise defective cylinder head gasket
COMPRESSION TEST PROCEDURE
NOTE:
• Before testing the engine for compression pressure,
make sure that the cylinder head nuts are tightened to
the specified torque values and valves are properly ad
justed.
• Have the engine warmed-up before testing.
" Make sure that the battery is fully-charged.
Remove the related parts and test the compression pres-
sure in the following manner.
• Install the compression gauge and adaptor in the spark
plug hole. Make sure that the connection is tight.
• Keep the throttle grip in the fully opened position.
• Press the starter button and crank the engine for a few
seconds. Record the maximum gauge reading as the
09915-64510: Compression gauge
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Standard
1 000-1 400 kPa
2
cylinder compression.
09918-03810: Adaptor
manuals search engine
Limit
800 kPa 8
2
kg/cm
114 psi
PERIODIC MAINTENANCE 2-18