Universal thermal unit for mopeds
The Ø 47 thermal unit BIG DEPS 4 mhr combines the best aspects of BIG DEPS thermal units with absolutely innovative and unique features. Intended for all Ciao, Si, Bravo, Boss, Grillo mopeds, it is at the top of the range of the already extensive family of tuning kits for Mopeds. The drilling, unlike the other components in the range, involves fixing the cylinder exclusively to the MP-One Malossi crankcase by means of 4 studs thanks to which, in addition to distributing the efforts in a much more efficient way during operation, our technicians have finally created a outlet perfectly centered with the axis along which the whole washing process develops, with, at the same time, a much thinner and more profiled crosspiece.
TECHNICAL FEATURES
CYLINDER
The cylinder draws its peculiar characteristics from the BIG DEPS range: same aluminum alloy, barrel with nickel-chrome coating, same redesigned central core and identical ring washing strategy. The support surface in the front part of the cylinder continues to be worked with high precision diamond tools and has 4 holes for fixing the exhaust flange. The result translated into a further and significant increase in performance! Finally, the most reliable and safe coupling and centering strategy between cylinder and head has also been applied to these cylinders: external centering! By means of this technique, the same used in our range of cylinders for competitions, the relative centering of the two components is obtained thanks to a high-precision coupling made on an external diameter of the cylinder fixing studs. This strategy is successful because it does not require any interface component, such as bushings could be for example, and moreover, being made on an external diameter of the studs, it allows to exploit areas of the cylinder normally free from further tensions, typical of the geometry close to the flue, where combustion takes place, without dangerously overloading the resistant structure. The position makes the machining more agile and allows greater precision of the couplings.
SEALS
The gasket envelope is enriched with a specific 0.5 mm gasket in ANNEALED COPPER, specifically designed for the new head. This material has a higher thermal transmission coefficient than aluminum and, therefore, transmits a greater amount of heat from the combustion chamber to the cooling fins, keeping the temperatures in the chamber more controlled. A greater permeability to the heat flow also allows to avoid the danger of overheating of the gasket itself and increases its duration over time, also avoiding leakage of the mixture out of the head.
PISTON
For the correct sizing of the entire thermal group, our technicians have studied a new version of the historic Ø 47 piston equipped with a single sealing band, also made with the most modern technologies. The single band allows you to maintain the same standard of sealing and pressure insulation, but with lower friction, to the benefit of performance and durability.
DRAIN CONNECTOR
The exhaust union uses the same strategy as the other versions: a steel fitting with a housing for OR fits into the seat obtained in the cylinder and is held in position by a flange, also in aluminium, made by high precision laser cutting and fixed with 4 screws. With this system, no matter how much power the engine can produce, our exhaust will not unscrew and will not yield even in extreme conditions!
HEAD
An absolute novelty: the detail that makes the new thermal unit even more unique! Malossi technicians have invested a lot of energy to create an innovative head with unique characteristics.
FEATURES
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Colore | Multicolore |
EAN | Non applicabile |
MPN | 3118213 |
Paese di fabbricazione | Italia |
Marca | Malossi |
Descrizione della modifica | GRUPPO TERMICO BIG DEPS 4 MHR Ø 47 IN ALLUMINIO CON SPINOTTO Ø 12 |
Inserzione bundle | No |
Articolo modificato | Sì |