3818996 Malossi Aluminium cylinder head D.47 whit decompressor

An absolute novelty: the detail that makes the new cylinder kit even more unique!The Malossi technicians have invested a great deal of energy in creating an innovative head with unique features.

CHARACTERISTICS

1. Profiled fins to channel the flow of cooling air and to make it flow along the hottest surfaces, thus optimising the heat exchange and, consequently, the outflow of heat from the combustion chamber to prevent dangerous temperature levels from being reached.
2. An additional lateral fin to direct as much heat as possible from the combustion chamber towards the outside of the cylinder and to maximise every fin, including the external ones, further away from the heat source and therefore less efficient and less involved in the disposal action.
3. A central radially strengthened structure, starting from the centre of the combustion chamber, to significantly increase the general resistance of the structure itself and to contain the deformations due to elongation of the aluminium at engine operating temperatures. By decreasing the deformations, the contact between the head and the cylinder is always and constantly on one level and guarantees insulation of the combustion chamber from the external environment, eliminating any possible source of outward loss or leakage.
4. A spark plug perfectly centred in the combustion chamber. By centralising the spark and keeping the entire washing chain (intake and exhaust ports) symmetrical with respect to the cylinder and directed along a single axis, without damaging curvatures of the flow of fresh and burnt gases, an exceptionally regular combustion was obtained, developed in a straight line across the top of the piston crown. The higher performances, due to optimisation of the washing, trapping and combustion performances, have been coupled with optimisation and an optimal distribution of the stresses derived from both the pressure of the expanding gases, and the inertial forces of the crank mechanism kinematics, better tolerated by the supporting structures of the engine.
5. In the lower part there is an additional fin which, facilitated by a fin extended to the opposite side to create a bulkhead, is able to channel the flow of air towards the finned part. This solution is used to exploit every surface of the head, directing the heat flow away from the combustion chamber.
6. Domes adequately sized and integrated into the geometry of the head with a surface for supporting the fixing nuts machined in order to obtain surfaces with low roughness.
7. The old fastening system with nuts and washers has been improved with the use of modern flanged hex nuts which are much more comfortable and functional.
8. The central dome houses a flanged hex head screw with which the valve lifter for the decompressor supplied in the kit is fixed.
9. A groove created in front of the seat for the valve lifter and a stop integral with the structure of the head, located in the rear part, allow the housing and correct fixing of the cable for handling of the decompressor on the Ciao, "Si” and "Bravo” type vehicles.

THE RESULT IS A HEAD THAT CAN BE MOUNTED ON EVERY TYPE OF MOPED, WITH UNIQUE TECHNICAL AND PERFORMANCE CHARACTERISTICS AND ACCOMPANYING FIRST-CLASS COMPONENTS!