Fit each ring in bore and check the end gap

CLEANING PISTONS
FITTING NEW RINGS

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•Wax can also be used in the combustion chamber. WD40 applied to piston crown to prevent sticking to wax.

•Adjustment is made with base and head gaskets to obtain 1mm of clearance.

Note lines in chamber where head gasket sits. Squish area is just inside gasket in flat area before the chamber tapers down toward the valves.

Measurements can be taken with a micrometer or vernier calipers. Here, the solder thickness, after piston compression, is checked.

CHECKING SQUISH---DUCATI 748

1MM Solder is positioned in the squish area of the combustion chamber with Play Dough.

CHECKING "SQUISH"

Special wax in varying thicknesses can be used on the piston crown.