Here is the 187cc Ø63mm aluminum kit from malossi specific for 60mm long stroke!
Completely new, it was created to give the best results and an exemplary lifespan. Every aspect of the system has been studied to optimize mechanical resistance, fluid dynamics and to improve combustion
As for the cylinder, it is completely made of high strength aluminum alloy and with a chrome nickel coated jacket. Composed of a central core of constant thickness around the liner and transfers, it guarantees a constant heat exchange, and therefore a controlled temperature of introduction of the gases into the chamber and an optimal heat exchange at the level of the exhaust; it features aerodynamic cooling fins around the core, designed for maximum cooling air penetration efficiency. The main innovation is represented by the transfer completely revised and corrected, by introducing the Rapid Fluid Cycle according to the latest innovations obtained thanks to the experience acquired during the competitions. The transfers have been increased to the number of 7, characteristic which distinguishes the Malossi kits, thanks to which it has been possible to obtain the best performance in terms of fluid dynamics. The connection to the pot is made by a flange-fitting set fixed to the cylinder by 4 cylindrical-head screws and an O-ring at the exhaust inserted to prevent any leakage from the thermal group. This very simple assembly system guarantees the greatest resistance with the use of all the pots with Ø 37 entry on the market, avoiding any problem of unscrewing or rotation caused by the friction of the vehicle. On the other hand, the connection with the head is now carried out through a high precision centering on the support planes obtained with numerically controlled machines. A set of basic gaskets with several thicknesses is provided to allow the user to adjust the compression by adopting it for the most varied uses.
The Ø15mm piston pin is cast with an innovative material, composed of a steel core coated with an aluminum and silicon alloy, which confers extreme lightness as well as excellent corrosion resistance, even at high temperatures, and a reflection of the heat derived from the combustion, the heat flow is then conveyed to the dissipating surfaces, promoting the cooling of the combustion chamber and the maintenance of the latter within the optimum temperature limits. It has, in the internal part of the mantle, ribs embedded in the fusion which confer the right strength in the areas most mechanically stressed, while allowing to lighten the piston as much as possible. On the other hand, the windows located on the rear part and the diametrical notches guarantee the maximum possible flow of fresh air towards the transfers of the cylinders.
The cylinder head is provided with profiled blades according to modern simulations to allow the greatest possible penetration of the air coming from the cooling installation which touches the head with an increase of the efficiency of more than 10% compared to a traditional system with straight fins. The combustion chamber, with a hemispherical profile, has been machined with tolerances to the tenth of a millimeter and develops high combustion The combustion chamber, with a hemispherical profile, has been machined with tolerances to the tenth of a millimeter and develops high combustion turbulence, with pressure peaks calculated at the most suitable speeds to obtain the best performance in terms of torque and power, the extremely high temperatures reached in this particular zone of border between the head and the cylinder, which are often at the origin of hot spots and detonations, are resolved using an aerospace type solution
We recommend placing a 30mm carburetor with the stroke of the crankshaft 60 mm, you will have a compression ratio of 12.5: 1.
Mounts on :
LML STAR 125 2T
LML STAR 150 2T
VESPA COSA 125 2T
VESPA COSA 150 2T
VESPA PX 125 2T euro 0-1
VESPA PX 125 2T euro 2 (VLX2M)
VESPA PX 125 2T euro 3
VESPA PX 150 2T euro 0-1
VESPA PX 150 2T euro 2 (VLX2M)
VESPA PX 150 2T euro 3
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