Malossi MHR TEAM aluminum thermal unit D 40 50cc LC dismountable head

The Malossi MHR TEAM Ø 40 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 is the natural evolution of the Malossi MHR line and has contributed to the victories of the 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 material acquires high toughness and rigidity, maintaining constant mechanical and dimensional characteristics up to temperatures of 250°C. The chip removal processes are carried out with very tight dimensional and shape tolerances, guaranteeing a high-quality finish. 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 exhaust and transfer diagrams have been specifically designed and made for competition, with a significant commitment from Malossi technicians.

The piston is made of a special alloy with a very high percentage of silicon, guaranteeing high resistance to high temperatures and optimal resistance. The external tin coating reduces the friction coefficient. The structure of the piston is reinforced to withstand the stresses imposed by a competition thermal unit, but at the same time, it is lightweight to reduce inertia forces. The segment is made of high-strength spheroidal cast iron, with a rectified and lapped hard chrome coating on the contact surface.

The brand new Malossi detachable head is designed to ensure the disposal of heat generated by a high-specific power engine intended for competition. Made of a special alloy of bonified aluminum with a high silicon content, the head is directly fixed to the cylinder barrel and is bathed by the cooling liquid on its entire outer surface, guaranteeing a high heat exchange surface. The head is detached from the outer walls, allowing it to follow the cylinder's expansions. The combustion chamber is made with numerically controlled machines to guarantee precise dimensional and shape tolerances. The detachable head system is completed with a cover that ensures the sealing of the cooling liquid. The geometry and squish of the combustion chamber have been specifically designed for use in the Scooter Speed Trophy and Scooter Cross Trophy.

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.

Product compatible only with Malossi crankshafts art. 53 9212, 5316005, (53 9703, 5314544, 5314887: production discontinued).

• 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

Product compatible only with Malossi crankshafts art. 53 9212, 5316005, (53 9703, 5314544, 5314887: production discontinued)

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

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