Compression Check; Compression Test Procedure - Suzuki Katana 1100 Service Manual

3-1 ENGINE
COMPRESSION CHECK
The compression of a cylinder is a good indicator
of its internal condition. The decision to overhaul
the cylinders is often based on the results of a
compression test. Periodic maintenance records
kept at your dealership should include compres­
sion readings for each maintenance service.
COMPRESSION
Difference
Standard
Limit
I.
1 100 - 1500 kPa
t
900 kPa 200 kPa
(11 - 15 k g /cm
2
)
C
k g /cm 2
)
C
k g /cm 2
)
156-213psi 128 psi 28 psi
Low compression pressure can indicate any of the
following conditions:
*
Excessively worn cylinder wall
*
Worn-down piston or piston rings
*
Piston rings stuck in the grooves
*
Poor seating of valves
*
Ruptured or otherwise defective cylinder head
gasket
Overhaul the engine in the following cases:
*
Compression pressure in one of the cylinders
is less than 900 kPa (9 kg/cm
2
,
128 psi).
*
Difference in compression pressure between
any two cylinders is more than 200 kPa (2
kg/cm
2
,
28 psi).
*
All compression pressure are below 1100 kPa
(11 kg/cm 2
,
156 psi)(standard} even when they
measure than 900 kPa (9 kg/cm 2
,
128 psi).
COMPRESSION TEST PROCEDURE
NOTE:
*
Before testing the engine for compression
pressure, make sure that the cylinder head nuts
and bolt are tightened to the specified torque
values and valves are properly adjusted.
*
Warm up the engine before testing.
• Remove the seat.
• Remove the left and right frame covers.
• Remove the fuel tank mounting bolts at rear end
of the fuel tank and slide the fuel tank backward,
and lift up the fuel tank with a proper block.
• Remove the all spark plugs.
• Fit the compression gauge
CD
in one of the plug
holes, while taking care that the connection is
tight.
• Twist the throttle grip full open.
• Crank the engine a few seconds with the starter,
and record the maximum gauge reading as the
compression of that cylinder.
• Repeat this procedure with the other cylinders.
09915-64510: Compression gauge
09915-63210:
Adaptor