Cylinder Compression Test; Cylinder Head Cover Removal - Honda CBF600SA Service Manual

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys.
CYLINDER HEAD/VALVES

CYLINDER COMPRESSION TEST

Warm the engine to normal operating temperature.
Stop the engine and remove the all spark plug caps
and spark plugs (page 3-8).
Lift and support the fuel tank (page 3-5).
Disconnect the fuel pump unit 2P (Black) connector.
Install a compression gauge into the spark plug
hole.
TOOL:
Compression gauge
attachment
Open the throttle all the way and crank the engine
with the starter motor until the gauge reading stops
rising.
The maximum reading is usually reached within 4 –
7 seconds.
Compression pressure:
1,304 kPa (13.3 kgf/cm
Low compression can be caused by:
– Blown cylinder head gasket
– Improper valve adjustment
– Valve leakage
– Worn piston rings or cylinder
High compression can be caused by:
– Carbon deposits in combustion chamber or on
piston head

CYLINDER HEAD COVER REMOVAL

Remove the fuel tank (page 5-59).
Disconnect the spark plug caps.
Disconnect the PAIR air suction hoses from the cyl-
inder head cover.
8-6
email: info@motomatrix.co.uk
07RMJ-MY50100 or
equivalent commer-
cially available
2 -1
, 189 psi) at 350 min (rpm)
2P (Black) CONNECTOR
COMPRESSION GAUGE
SPARK PLUG CAPS
PAIR AIR SUCTION HOSES