Malossi MHR TEAM aluminum thermal unit D 50 77cc LC dismountable head
for DERBI GPR RACING 50
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-20%
Special Price €369.80 Regular Price €462.23
The Malossi MHR TEAM Ø 50 thermal unit is a high-quality and high-performance product, ideal for riders who want to participate in National and European Trophies. This new thermal unit represents the evolution of the Malossi MHR line and has contributed to the victories of official teams in cross and speed trophies.
The cylinder is made of a special alloy of aluminum with a high percentage of silicon and titanium, which guarantees high resistance to high temperatures. Thanks to a special heat treatment, the cylinder maintains its mechanical and dimensional characteristics constant up to temperatures of 250°C. The machining operations are carried out with extremely precise dimensional and shape tolerances. The internal surface of the cylinder is coated with silicon carbides on a nickel matrix, which gives the material high hardness and remarkable wear resistance.
The piston is made of a special alloy with a high percentage of silicon, which guarantees high resistance to high temperatures. The external tin coating minimizes the friction coefficient. The structure of the piston is reinforced to withstand the stresses imposed by a high-performance thermal unit, but at the same time, it is lightweight to reduce inertia forces.
The ring is made of spheroidal cast iron with high mechanical resistance, with a hard chrome anti-wear coating.
The removable Malossi head is specifically designed to ensure the dissipation of heat generated by a high-power engine intended for competition. It consists of a head made of a special aluminum alloy directly fixed to the cylinder barrel, which is cooled by the coolant on its entire outer surface. The head is free to follow the expansions of the cylinder thanks to its independence from the outer walls. The combustion chamber is made with numerical control machines to guarantee extremely precise dimensional and shape tolerances. The removable head system is completed with a cover that ensures the sealing of the coolant. The geometry and squish of the combustion chamber have been specifically designed for use in the Scooter Speed Trophy and Scooter Cross Trophy.
