Malossi 4 Valve Cylinder Head for Liquid Cooled Vespa/Piaggio

The 1st performance head for Vespa/Piaggio 4-stroke, liquid cooled engines 200 cc, 250 cc, 300 cc. These are the latest in design and technology. 25% larger ports and will increases your scooters power by 15-25%.

Includes valves and head, but NOT the gaskets or cam.


Technical Specifications:


* Head made of gravity-fed cast aluminum 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 characterized 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 Aluminum 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.




You will have to modify the original piston to fit this head or buy the big bore Malossi cylinder number M3113928 (or M3111473 for 200cc GT-BV).


PLEASE CALL/EMAIL US IF YOU'RE PUTTING THIS ON A GT200 (REQUIRES A SPECIAL PISTON) OR IF YOU'RE UNSURE ABOUT THE PARTS REQUIRED FOR INSTALLATION.

We've install a few of these now and they 
are amazing. Here's a few tips for installing
it.

When installing this kit on any fuel injected 
model like the 250 or 300, the small spigot 
near the thermostat needs to be cut off. 
Not noted in the instructions.
                                    
If your installing this kit on a carbureted 
GT200or BV200. It would be recommend 
that the thermostat housing be upgraded 
to the GTS style and the carburetor heater 
hoses and bypass hoses will be eliminated. 
It will also save time not needing to drill 
the Malossi cylinder head out.
                                    
Also the small o-ring under the thermostat 
housing will need to be replaced when
installing the head, see the part number 
on the SERV-GT-TOP-END,something like 
279079
                                    
The head makes a noticeable different at high 
RPMs/ high speed but not much at the lower 
RPMs.  It will always benefit from lighter 
roller weights than stock.