Malossi CAST-I-CYLINDER KIT 55 VESPA 50

Cylinder

• Material: special self-lubricating, wear-resistant, highly refined cast iron alloys, obtained by Shell Moulding gravity die-casting.
• Machining: on numerically controlled high precision machine tools.
• Recalculated and increased heat exchange surfaces.
• Exhaust and transfer ports designed and tuned for maximum thermodynamic performance.
• Dimensional and surface finish quality control performed according to Malossi's internal specifications.
• Cylinder and piston selected for a 100% fit of 0.010-0.005 mm.
• Checking of all the seals carried out.

Piston

• Material: special aluminium alloy with high silicon content and low thermal expansion.
• Machining: on numerically controlled machine tools.
• Lightened and strengthened.
• Heat exchange surfaces increased.

Piston rings

• Piston rings in very strong modular cast iron with ground, wear-resistant.

Head

• Material: special die-cast aluminium alloy.
• Geometry of heat exchange surfaces recalculated and increased.
• Machining: numerically controlled high precision machines with diamond tools.
• Surface rust prevention treatment.
• Viton Head Gasket.
• Hemispheric combustion chamber with centred squish and spark plug.

 

Article	31 7903 Ø 47 mm	31 8691 Ø 55 mm
Capacity	74,60	102,16
Use	Urban / Sport	Urban / Sport
Power range	6/8	8/10
Level of elaboration	easy	easy
Carburettor recommended	Shb 16 - shb 19	Shbc 20 - phbl 25
Stroke	43	43
Compression ratio	12,5:1	11,8:1
Piston rings	2	2
N. of transferts	6	6
Head	Hemispherical	Hemispherical
Spark plug	Central iw f 24	Central iw f 24
Piston	alluminium alloy 21%	alluminium alloy 21%

 

Modellek:

• PIAGGIO APE 50 2T <-1989
• PIAGGIO APE FL2 50 2T 1990->1995
• PIAGGIO APE FL3 50 2T 1996->1999
• PIAGGIO APE FL 50 2T 1989->1990
• VESPA PK HP FL 50 2T
• VESPA PK 50 2T
• VESPA PK FL 50 2T
• VESPA PK XL 50 2T
• VESPA SPECIAL 50