5-20 ENGINE TOP END
Cylinder Compression Measurement
Use the battery which is fully charged.
Warm up the engine thoroughly.
Stop the engine.
Seat (see Seat Removal in the Frame chapter)
Fuel Tank (see Fuel Tank Removal in the Fuel System
Air Cleaner Housing (see Air Cleaner Housing Removal
in the Fuel System (DFI) chapter)
Stick Coils (see Stick Coil (Ignition Coil together with
Spark Plug Cap) Removal in the Electrical System chap-
Spark Plugs (see Spark Plug Replacement in the Peri-
odic Maintenance chapter)
Owner's Tool - Spark Plug Wrench, 16 mm: 92110-1132
Reconnect the connectors of the air switching valve
lead and the inlet air temperature sensor lead. When
the ignition switch is turned ON with the above connec-
tors disconnected, the service codes (13, 64) are stores
in the ECU.
Attach the compression gauge [A] and adapter [B] firmly
into the spark plug hole.
Using the starter motor, turn the engine over with the throt-
tle fully open until the compression gauge stops rising; the
compression is the highest reading obtainable.
Special Tools - Compression Gauge, 20 kgf/cm²: 57001-221
Compression Gauge Adapter, M10 × 1.0:
Usable Range: 961 ∼ 1 471 kPa (9.8 ∼ 15.0 kgf/cm², 139
∼ 213 psi) @400 r/min (rpm)
Repeat the measurement for the other cylinders.
Install the spark plugs.
Torque - Spark Plugs: 15 N·m (1.5 kgf·m, 11 ft·lb)