Malossi MHR aluminum thermal unit D 47 piston pin 10

The Malossi MHR Ø 47 thermal unit is a high-quality product, specifically designed for competitions.

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

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

The machining operations are performed with precision on numerically controlled machining centers, ensuring very tight dimensional and shape tolerances.

The internal surface of the cylinder is coated with silicon carbides on a nickel matrix, which gives the material a very high hardness and remarkable wear resistance.

The internal machining of the cylinder is carried out with special machines that allow obtaining a very high finish on the sliding walls.

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

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

The external tin coating reduces the friction coefficient.

The structure of the piston is reinforced to withstand the stresses imposed in competition, but at the same time, it is light to reduce inertia forces.

The piston ring is made of 1 mm spheroidal cast iron with a hard chrome coating on the outer surface.

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

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

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

The head machining is performed on numerically controlled 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.

If the crankshaft has a Ø 12 mm pin, it is necessary to use the Malossi piston with 2 segments art. 34 7849.

• APRILIA AMICO 50 2 stroke
• APRILIA SR 50 2 stroke <-1993
• FANTIC BIG WHEEL 50 2 stroke
• ITALJET PISTA 2 50 2 stroke
• ITALJET SCOOP 50 2 stroke
• MBK BOOSTER 50 2 stroke euro 0-1
• MBK BOOSTER 50 2 stroke euro 2 (A137E)
• MBK BOOSTER NAKED 50 2 stroke euro 2 (A137E)
• MBK BOOSTER NG 50 2 stroke euro 0-1
• MBK BOOSTER NG 50 2 stroke euro 2 (A137E)
• MBK BOOSTER ROCKET 50 2 stroke euro 0-1
• MBK BOOSTER ROCKET 50 2 stroke euro 2 (A137E)
• MBK BOOSTER SPIRIT 50 2 stroke euro 0-1
• MBK STUNT 50 2 stroke euro 0-1
• MBK STUNT 50 2 stroke euro 2
• YAMAHA BW'S 50 2 stroke euro 0-1
• YAMAHA BW'S 50 2 stroke euro 2 (A137E)
• YAMAHA BW'S NG 50 2 stroke euro 0-1
• YAMAHA BW'S NG 50 2 stroke euro 2 (A137E)
• YAMAHA BW'S Original/Naked 50 2 stroke euro 2 2010-> (A137E)
• YAMAHA SLIDER 50 2 stroke
• YAMAHA SPY 50 2 stroke
• YAMAHA ZUMA 50 2 stroke