Compression Test

Compression Test

You will need a compression tester:

Step 1: Remove the spark plug wire(s)

Step 2: Remove the spark plug(s)

Step 3: Screw in the compression tester hose in to the spark plug hole

Step 4: Now you want to hold the throttle at full throttle and kick start or push the start button continue until you get you're reading. Repeat 5 times to see if the results match. If there is more then one cylinder repeat for the rest of them.

Step 5: Compare you're results to the spec. in the service manual. If you have more than one cylinder the maximum allowable difference between cylinders can only be a 10% difference.