Cylinder Compression; Cylinder Head Cover Removal - Honda Transalp XL700V Manual

CYLINDER HEAD/VALVES

CYLINDER COMPRESSION

If the engine must be running to do some work,
make sure the area is well-ventilated, Never run the
engine in an enclosed area.
Warm up the engine to normal operating tempera-
To measure the
ture.
cylinder
Stop the engine, disconnect the spark plug caps and
compression of
remove one spark plug at a time.
each cylinder,
remove only one
Shift the transmission into neutral.
plug at a time.
Install a compression gauge into the spark plug
hole.
Open the throttle all the way and crank the engine
with the starter motor until the gauge reading stop
rising.
The maximum reading is usually reached within 4 –
To avoid discharging
7 seconds.
the battery, do not
operate the starter
Compression pressure:
motor for more
1,373 ± 98 kPa (14.0 ± 1.0 kgf/cm
than seven
400 min
seconds.
Low compression can be caused by:
– Blown cylinder head gasket
– Improper valve adjustment
– Valve leakage
– Worn piston ring or cylinder
High compression can be caused by:
– Carbon deposits in combustion chamber or on
piston head

CYLINDER HEAD COVER REMOVAL

FRONT
Remove the following:
– Right air guide (page 2-10)
– Front ignition coil (page 18-8)
– Throttle body (page 5-65)
Remove the cylinder head cover bolts, washers and
rubber seals.
Disconnect the air supply hose from the PAIR check
valve cover.
8-6
, 199 ± 14 psi) at
2
-1
(rpm)
COMPRESSION GAUGE
BOLTS/WASHERS/RUBBER SEALS
AIR SUPPLY HOSE