Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Piston: Testing and Inspection

1. Check the piston for distortion or cracks.

NOTE: If the cylinder is bored, an oversized piston must be used.

2. Measure the piston diameter at a point 15 mm (0.6 inch) from the bottom of the skirt.

3. Calculate the,difference between cylinder bore diameter on and piston diameter.

NOTE: If the clearance is near or exceeds the service limit, inspect the piston and cylinder block for excessive wear.