CAUTION:
After warming-up, engine becomes very hot. Be careful not to burn yourself during measurement.
1. After warming-up the engine, turn the ignition switch to OFF.
2. Make sure that the battery is fully charged.
3. Release the fuel pressure. 
4. Remove all the spark plugs.
5. Fully open the throttle valve.
6. Check the starter motor for satisfactory performance and operation.
7. Securely hold the compression gauge to the spark plug hole.
NOTE:
When using a screw-in type compression gauge, the screw should be less than 18 mm (0.71 in) long.
8. Crank the engine using the starter motor, and read the maximum value on the gauge when the needle becomes steady.
9. Perform at least two measurements per cylinder, and make sure that the values are correct.
Compression (throttle full open):
Standard
1,100 — 1,300 kPa (11.2 — 13.3 kgf/cm2, 160 — 189 psi)
Difference between cylinders
49 kPa (0.5 kgf/cm2, 7 psi) or less
10. After inspection, install the related parts in the reverse order of removal.