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9:00-18:00 (monday-friday)Malossi MHR Bigbore 94cc Exhaust for Minarelli Horizontal
The Malossi MHR Big Bore Ø52 94cc Exhaust for Minarelli Horizontal 2T is a competition exhaust developed to accompany compatible Malossi MHR Big Bore 94cc flange-mount cylinders.
Derived from the Malossi Scooter Racing range, this exhaust was designed with a specific goal: to maximize the potential of the cylinder it is paired with and to offer performance adapted to the demands of very high-performance engine tuning.
At Malossi, the development of Racing exhausts is carried out in parallel with the cylinders. Each model benefits from in-depth fluid dynamics studies to determine the shapes, dimensions, and characteristics necessary for optimal operation.
On a 2-stroke engine, the geometry of the expansion chamber directly influences the flow of pressure waves, the scavenging of exhaust gases, and the retention of the fresh mixture in the cylinder.
The MHR Big Bore Ø52 is distinguished by a new design of its cones, now oriented upwards, which gives it a dynamic appearance while contributing to the evolution of its operating characteristics.
Malossi engineers have specifically reworked the curvature of the exhaust header to widen the engine's operating range and facilitate the search for effective tuning.
According to Malossi, these modifications have made it possible to achieve a notable increase in power and to exploit higher engine speeds.
For the version intended for the 94cc, the manufacturer indicates that maximum power is reached at around 13,800 rpm in the corresponding development configuration.
This characteristic illustrates the resolutely Racing orientation of this exhaust, intended for engines tuned to operate at high RPMs.
The body of the exhaust is manufactured from steel sheets with a constant thickness of 0.8 mm, laser-cut and assembled by precision welding.
The consistency of manufacturing and compliance with dimensional tolerances contribute to maintaining the required pressure characteristics inside the expansion chamber.
The cylinder mounting system uses a light alloy fitting with four mounting holes, specially designed to promote the flow of exhaust gases and optimize their circulation.
This design incorporates a solution developed for MHR Team II exhausts, now adapted to the MHR Big Bore Ø52 version.
The exhaust is accompanied by an anodized Nitro Blue aluminum silencer, a distinctive finish of the Malossi Racing range.
The silencer connection system has also been simplified. It attaches to the exhaust using a lightweight system with a single mounting screw, making it easier to install and remove.
The Malossi MHR Big Bore Ø52 94cc is aimed at tuners looking for an exhaust specially developed for a large-displacement competition setup.
To obtain the best performance, Malossi recommends pairing each Scooter Racing exhaust with the cylinder for which it was designed.
