PIAGGIO MSS Fly 50 4T User Manual

- Provisionally fit the piston into the cylinder, without any base gasket.
- Fit a dial gauge on the specific tool, then rest both on a stop surface.
- Zero set the dial gauge on the stop surface. Keeping the zero position, assemble the tool on the cylinder
and lock it with 2 nuts as shown in the figure.
- Rotate the crankshaft until TDC (the inverted point of the dial gauge rotation)
- Measure piston protrusion compared with the head plane and determine the gasket thickness to be
used according to the table below. By correctly identifying the cylinder base gasket thickness, an ade-
quate compression ratio is maintained.
- Remove the specific tool and the cylinder.
Characteristic
Standard compression ratio
C.R. 11.5 ÷ 12 ÷ 1
CYLINDER BASE GASKET THICKNESS
Specification
Desc./Quantity
Cylinder height 56.45 ± 0.05
Head gasket thickness (fibre) 0.95 ± 0.06
Measure detected 0.9 ± 0.05
Base gasket thickness 0.4
Measure detected 1 ± 0.05
Base gasket thickness 0.5
MSS Fly 50 4T Engine
ENG - 91

PIAGGIO MSS Fly 50 4T Specifications

General

Brand	PIAGGIO
Model	MSS Fly 50 4T
Category	Scooter
Language	English