Vespa LXV 125 User Manual

Slot packing system
- Provisionally fit the piston into the cylinder, without any base gasket.
- Assemble a dial gauge on the specific tool
- Set the dial gauge to zero at a contrast plane with an average precharge, for example 5 mm. Keeping
the zero setting position, fit 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)
- Calculate the difference between the two measurements: use the chart below to identify the thickness
of the cylinder base gasket to be used for refitting. The proper identification of the cylinder base gasket
thickness allows maintaining the correct compression ratio.
- Remove the special tool and the cylinder.
Characteristic
Compression ratio (125)
10.6 : 1
SHIMMING SYSTEM
Specification
Desc./Quantity
Value measured 0 ÷ 0.1
Thickness 0.8 ± 0.05
Value measured 0.1 ÷ 0.3
Thickness 0.6 ± 0.05
Value measured 0.3 - 0.4
Thickness 0.4 ± 0.05
Characteristics LXV 125
CHAR - 14

Vespa LXV 125 Specifications

General

Engine Type	Single-cylinder, 4-stroke
Displacement	124 cc
Cooling System	Air-cooled
Fuel System	Carburetor
Seat Height	785 mm
Max Torque	9.6 Nm at 6, 000 rpm
Length	1, 770 mm
Front Brake	200 mm disc brake
Rear Brake	110 mm drum brake
Weight	114 kg
Top Speed	91 km/h
Transmission	Automatic CVT
Rear Suspension	Coil spring and hydraulic shock absorber