MM 170 tipo Corsa (1932) – A Rare Italian Racer with Rich Heritage

A unique piece of motorsport history waiting for a new owner.

We are presenting this extremely rare MM 170 Corsa from 1932. This motorcycle is not just a classic; it is a seasoned racer, built in an era when technical innovation and speed went hand in hand. The bike has been lovingly rebuilt in the past into a pure sports machine, featuring numerous high-quality modifications that set it apart from standard models.

Key Features & Technical Specifications

• Brand & Model: MM (Moto Mazzetti) 170 Corsa

• Year: 1932

• Engine: 170 cc single-cylinder OHV four-stroke with twin-port exhaust

• Gearbox: Burman 3-speed

• Ignition: Magneti Marelli

• Carburettor: Dellorto SS

• Lubrication: Dry-sump system with dual-action MM oil pump

• Rims: Borrani Record alloy wheels (very early type)

Matching Numbers

• Frame number: 32-A-1345

• Engine number: 32-A-1345 - 6060

About this Special Motorcycle

This MM has been built as a true competition bike and features an impressive list of modified components, including:

• Exposed valve pushrods for a raw, technical look

• Cylinder head lubrication for optimal performance

• Different ignition and carburettor for improved throttle response

• Foot-operated gearbox (instead of hand-shift)

• Exposed flywheel for that authentic racing feel

• Reinforced clutch for better power transfer

• Two-piece handlebars and a sports seat

• Early Borrani Record rims – a rarity in themselves

The engine starts and runs, but please note: this bike is set up as a racing machine and is supplied without lighting and without registration documents. This is a pure racer for the true enthusiast.

The History of MM (Moto Mazzetti)

Moto Mazzetti was founded in 1924 by Mario Mazzetti and Alfonso Morini in Bologna and grew into one of Italy's most technically innovative brands. Mazzetti was renowned for its unparalleled eye for detail and its passion for racing.

"Mario Mazzetti is considered one of the most illustrious names in the motorcycle industry, an enlightened technician, an inspired builder with the most uncompromising attention to detail, bordering on ruthless self-criticism. He is one of those technicians whose life is consumed by working with slide rules and compasses, with workshop equipment, and with design engineers and builders; one driven by a passion for his craft, so that through their hands the craft becomes art."
— Motociclismo, December 1964

When the 175cc racing class was introduced in the 1930s, MM developed this 175cc four-stroke racer, which quickly proved highly successful. The bike was not only a sensation on the track but also a commercial success, partly because the 175cc class was tax-exempt on public roads at the time. After 1933, when the rules changed, MM introduced a 250cc road model.

The 175cc racers continued to impress throughout the decade, setting world speed records and securing a runner-up finish in the Italian Championship with riders Serafini and Bonazzi. Even Scuderia Ferrari once campaigned an MM.

In 1937, the paths of Mazzetti and Morini diverged; Morini founded Moto Morini, while Mazzetti continued with MM for a while longer, until the company went bankrupt in 1957 – marking the definitive end of a legendary brand.

Conclusion

This MM 170 Corsa is more than just a motorcycle; it is a piece of living Italian racing heritage. A rare opportunity to own a piece of history from a brand that stood for engineering, passion, and speed.

Starts and runs!

Unfortunately, no further history is known, but the soul of this machine speaks for itself.

Bid now on this unique piece of motorsport history!

Please note

• No lighting

• No registration / title documents

• Sold as shown (as-is)