Name: Racing Cylinder MALOSSI 75 cc 31 7902
Brand: MALOSSI
SKU: 31790200
Price: 146 EUR

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for Vespa 50/PK50/S/XL/XL2

Show all matching vehicle models

Engine type: 50cc, Smallframe
Material: cast iron
6 ports
Ø 47mm
stroke 43mm
Pin 12mm
Without Cylinder Head
Recommended spark plug: NGK BR9ES
Recommended ignition timing: 17°
M6 exhaust studs

TUNING ROAD - suitable for everyday use

For race use only. Not admitted in the area of the German StVZO!

OEM number(s): 31 7902 (MALOSSI)

Free shipping

€146.00

VAT included

2kg / Piece

Product description

MALOSSI 75 cc cast iron cylinder kit with sporty design and O-Ring Cylinder Head.

To mark the 50th anniversary of Vespa, MALOSSI had its short-stroke cylinder kits fundamentally revised. The result is a 75cc kit with a clear focus on performance and quality, including an optimized head design and high compression.

6 transfer ports for very good scavenging and powerful acceleration
Cylinder Head with O-Ring seal for reliable tightness
ASSO Piston with 2 Piston Rings for clean sealing and durability

75 cc entry into the MALOSSI universe

This cylinder kit is MALOSSI's sporty homage to the classic Vespa short-stroke class. The combination of 6 transfer ports, high-quality ASSO Piston and the O-Ring Cylinder Head ensures a very powerful setup that feels significantly sportier than many competing solutions. Clean jetting and a correctly set Ignition are important for long full throttle runs; Super or Super Plus is also recommended.

Technical details at a glance

Material: gray cast iron
Bore: 47 mm
Stroke: 43 mm
Displacement: 74.60 ccm
Transfer ports: 6
Piston: 2 Piston Rings
Exhaust studs: 6 mm
Cylinder Head: MALOSSI original, O-Ring seal
Compression ratio: 12.5:1
Scope of delivery: incl. Gasket Set
Suitable for: Vespa 50 / PK / XL / XL2, except PK automatic
Case machining: not required (transfer ports as original)

Conclusion: Sporty 75cc classic from MALOSSI with high compression and strong details - a long-lasting companion when well tuned.

SIP-TIP:

Main Jet adjustment and new Spark Plug are mandatory. Gear ratio at least 3.72 primary. Tuned with 16/16 Carburettor, original exhaust with thick Exhaust Manifold or SITO banana; 19/19 Carburettor and Racing Exhaust are also possible with slight modifications. The original Studs M7x35 mm (4 pieces)are used.