Malossi MHR aluminum thermal unit D 47,6 70cc piston pin 12

The Malossi MHR Ø 47.6 thermal unit is a high-quality product for the competition sector.

The cylinder is made of a special alloy of aluminum with a high percentage of silicon and titanium, which gives it high resistance to deformation at high temperatures.

Thanks to the special heat treatment of tempering and stabilization, the material maintains constant its mechanical and dimensional characteristics up to temperatures of 250°C.

The machining operations are carried out with very tight dimensional and shape tolerances, guaranteeing high precision.

The internal surface of the cylinder is coated with silicon carbides on a nickel matrix, heat-treated to ensure a very high hardness and remarkable wear resistance.

The internal machining of the cylinder allows obtaining a very smooth finish on the sliding walls, thanks to the use of special machines.

The exhaust and transfer diagrams have been specifically studied and designed for competition, with a significant commitment from Malossi technicians.

The piston is made of a special alloy with a high percentage of silicon, which guarantees high resistance to high temperatures.

The external coating in tin reduces the friction coefficient.

The structure of the piston is reinforced to withstand the stresses imposed in a high-level competition, but at the same time, it is lightweight to reduce inertia forces.

The piston ring is made of spheroidal cast iron with a hard chrome coating on the outer surface.

The segments are made of spheroidal cast iron with a hard chrome anti-wear coating.

The head of the thermal unit is made of a special aluminum alloy with a high heat exchange coefficient.

The heat exchange surfaces have been recalculated and increased, and the combustion chamber has been redesigned to achieve a high compression ratio with very high turbulence.

The head is machined on numerical control machines.

COMPATIBILITY NOTES

Please note: The following notes refer only to the vehicles listed below. These vehicle lists may not represent the complete compatibility list for the product.

We recommend using the Malossi crankshaft art. 53 7600

• APRILIA SR (carb.) 50 2 stroke LC 2004-> (PIAGGIO)
• APRILIA SR R (carb.) 50 2 stroke LC (PIAGGIO)
• APRILIA SR Street 50 2 stroke LC euro 2
• DERBI GP1 50 2 stroke LC
• DERBI GP1 OPEN 50 2 stroke LC
• DERBI GP1 REVOLUTION 50 2 stroke LC
• GILERA DNA 50 2 stroke LC
• GILERA RUNNER 50 2 stroke LC
• GILERA RUNNER SP 50 2 stroke LC 2006-> (C451M)
• GILERA RUNNER SP 50 2 stroke LC <-2005
• PIAGGIO NRG 50 2 stroke LC
• PIAGGIO NRG EXTREME 50 2 stroke LC
• PIAGGIO NRG MC2 50 2 stroke LC 1998->
• PIAGGIO NRG MC2 50 2 stroke LC <-1997
• PIAGGIO NRG MC3 DD 50 2 stroke LC
• PIAGGIO NRG Power DD 50 2 stroke LC
• PIAGGIO QUARTZ 50 2 stroke LC
• PIAGGIO ZIP SP 50 2 stroke LC 2001->
• PIAGGIO ZIP SP 50 2 stroke LC <-2000

For proper assembly, it is necessary to also purchase the Malossi adapter art. 1518132B

We recommend using the Malossi crankshaft article 53 7600

• APRILIA SR R 50 2 stroke LC euro 4 2018-> (PIAGGIO CA81M)
• PIAGGIO NRG Power 50 2 stroke LC euro 4 2018->2020 (CA71M)

The use of the Malossi crankshaft art. 53 7600 is recommended

• PIAGGIO NTT 50 2 stroke LC