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Engine
Choosing the gasket
- Provisionally fit the piston into the cylinder, without any base gasket.
- Assemble a dial gauge on the specific tool
Support to check piston position 020428Y
- Set the dial gauge to zero placing the tool on a contrasting surface. Keeping the zero position, as-
semble the tool on the cylinder and lock it with 2 supplied nuts as shown in the figure.
- Rotate the crankshaft until TDC (the inverted point of the dial gauge rotation)
- Position the dial gauge on the piston as shown in the figure and measure how much the piston pro-
trudes.
- By means of the table shown in the specifications chapter identify the cylinder base gasket thickness
to be used for refitting. Correctly identify the cylinder base gasket thickness to keep the correct com-
pression ratio.
- Remove the specific tool and the cylinder.
N.B.
PISTON PROTRUSION IS MEASURED IN 125 ENGINES WHILE INTRODUCTION IS MEASURED
IN 200 ENGINES.
ENG - 122
X9 Evolution 125
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