Removing The Piston - PIAGGIO MP3 400 hpe E5 2021 Service Manual

MP3 400 hpe E5

Removing the piston

- Insert the pin.
- Insert the retainer rings.
CAUTION
POSITION THE ARROW PRINTED ON THE PISTON
CROWN TOWARDS THE EXHAUST OPENING.
CAUTION
AT EVERY NEW MOUNTING USE RETAINER RING PINS.
Choosing the gasket
- Provisionally fit the piston into the cylinder, without any base gasket.
- Assemble a dial gauge on the specific tool.
Specific tooling
020921Y Piston position checking tool
- Using an abutment plane, reset the dial gauge
with a pre-load of a few millimetres.
- Finally fix the dial gauge.
- Check the perfect sliding of the feeler pin.
- Install the tool on the cylinder without changing
the dial gauge position.
- Lock the tool using the original head fixing nuts.
- Rotate the crankshaft up to the TDC (the inver-
sion point of the dial gauge rotation).
- Measure the deviation from the reset value.
- By means of the table, see 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 compres-
sion ratio.
- Remove the special tool and the cylinder.
See also
Engine
ENG - 95