Now Even Bigger Piston than the Vespa 300.

 

Complete 275cc Big Bore Cylinder and Head kit from Malossi. 7

 

COMPLETE PERFORMANCE CYLINDER PIAGGIO QUASAR 250

 

TECHNICAL FEATURES

 

Cylinder

 

Material: primary aluminium alloy with a high content of hardened and tempered silicon, cylinder liner with silicon carbide coating in a galvanic nickel die and crossed smoothing with two diamond passages with very limited tolerances.

Machining: on machine tools with high precision numerical control.

Cylinder-piston connection with an allowance of 0.05 mm.

Recalculated and upgraded heat exchange surfaces.

Piston

 

Ultra compact with 3 rings.

Material: special aluminium alloy with high silicon content, low thermal expansion and a tin facing on the sliding surfaces.

Machining on machine tools with numerical control.

Lightened and reinforced.

Upgraded heat exchange surfaces.

Piston rings

 

Compression - special rings with high sliding ease and very high mechanical resistance, in chromium-plated S10 spheroidal cast-iron.

1st scraper - ring in chromium-plated S10 spheroidal cast iron.

2nd three - piece scraper ring made of chromium-plated steel alloy.

Head

 

Head made of gravity-fed cast aluminium alloy, tempered and sandblasted, machined within thousandth (mm) tolerances utilizing super precise work cells.

 

Valve guides designed with new profile, made using a powdered metal sintering process (steel, phosphorous, carbon, copper and manganese).

 

Valve seats made of cobalt-molybdenum steel alloy characterised by copper infiltration and a special heat/chemical treatment. Increased intake valve - ø 25 mm, made of a special steel alloy and a special heat/chemical treatment.

 

Increased exhaust valve - ø 22.2 mm and made of Nimonich 80 material (Nickel, Chromium, Titanium, and Aluminium alloy).

 

Exhaust and Intake valve springs made of Si-Cr oil-tempered and annealed steel, designed to operate optimally under increased loads due to increased engine power.

 

For optimum performance, we recommend the Malossi Lambda Emulator and the Malossi Force Master 2 Electronic controller for the fuel injector system.

 

Fits the Following Models WITH PIAGGIO 250CC QUASAR ENGINE

APRILIA Atlantic 250

APRILIA Scarabeo 250

APRILIA Sportcity i.e. 250

PIAGGIO BV 250

PIAGGIO MP3 250

PIAGGIO MP3 i.e. 250

VESPA GT 60° i.e. 250

VESPA GTS i.e. 250

VESPA GTV i.e. 250

 

 

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