Cylinder Compression; Cylinder Head Cover - Honda CB HORNET 160R 2015 Shop Manual

CYLINDER HEAD/VALVES

CYLINDER COMPRESSION

Reference
Warm up the engine to normal operating temperature.
engine oil
Stop the engine, disconnect the spark plug cap, and
temperature:
remove the spark plug (Page 3-7).
60 – 65°C
(140 –149°F)
To avoid Install a compression gauge attachment into the spark
discharging plug hole.
the battery, do
Connect a compression gauge to the attachment.
not operate the
starter motor
TOOL:
for more than 5
Compression gauge attachment 07RMJ-MY50100 or
seconds.
equivalent commercially available
Ensure battery
Turn the ignition switch ON.
in fully charge
Shift the transmission into neutral.
state incase
done by self
Open the throttle all the way and crank the engine with the
start method.
kickstarter until the gauge reading stops rising.
COMPRESSION PRESSURE:
1300 kPa (13.2 kgf/cm², 188.5 psi) at 650 min
If compression is high, it indicates that carbon deposits
have accumulated on the combustion chamber and/or
the piston crown.
If compression is low, pour 3 – 5 cc (0.1 – 0.2 oz) of lean
engine oil into the cylinder through the spark plug hole
and recheck the compression.
If the compression increases from the previous value,
check the cylinder, piston and piston rings.
– Blown cylinder head gasket
– Improper valve clearance adjustment
– Worn piston ring / Cylinder and piston
If compression is the same as the previous value,
check the valves for leakage.

CYLINDER HEAD COVER

REMOVAL
Remove the both side covers (Page 2-3).
Disconnect the air supply hose (Page 3-14).
Remove the bolts (4 nos.).
7-4
PLUG CAP
USING KICK START
-1
(rpm)
USING SELF START
AIR SUPPLY HOSE
SPARK PLUG
COMPRESSION
GAUGE
COMPRESSION
GAUGE
BOLTS