MALOSSI is the best that the scooter tuning world has to offer in the area of engine tuning. It is therefore perfectly reasonable that MALOSSI has also found ways to keep the increased performance under control and on the track. The result is the almost unbelievably high quality and precision of Malossi MHR Racing Parts. MALOSSI's experience on the race circuits flows directly into the development of their products and it shows. This means that in addition to racing enthusiasts, everyday Scooter riders can now access and benefit from these high end products.

 

Malossi MHR Clutch System for Scooter Racing. Included 107mm Delta Clutch and One Piece Forged Clutch Bell with Reinforced Cooling Ring. Fits Yamaha and other Minarelli with 107mm Clutch Bell.

 

MALOSSI DELTA SYSTEM

 

comprises the famous:

 

Patented adjustable clutch (Malossi Delta Clutch).

In addition, the reinforced, anti-failure clutch bell (Wing Clutch Bell) with cooling fins, dynamically balanced, designed for competitive and sport applications.

 

Delta Clutch

 

Delta Clutch is a clutch developed within the scooter racing circuits and in a short period has become a benchmark product, key to scooter performance.

 

The simplicity of the system quickly allows spring adjustment with regards to centrifugal force and the possibility of interchanging a spring with different K values. These values are listed in the Malossi catalogue.

 

Another option this system allows is position adjustment of the small mass which determines the pressure between friction material and clutch bell. In addition, this small mass is interchangeable with other masses of varying weights.

 

The complete system is patented to protect against shameless attempts to copy and falsify the product.

 

Delta has attained the recognition of many qualified tuners and the facts are the proof: used by all the racing teams and a vast amount of sport riders, resulting in a continuous increase in sales.

 

As always, Malossi constantly analyses its products during their operation and Delta is no exemption. It has been optimized by implementing small but important updates, maintaining Delta as a leading edge product.

 

We are very proud of the fact that Malossi clutches are asbestos free, however, much investment in research was needed in achieving this present level of quality, reliability, and especially selection of friction materials.

 

We can now affirm, with great certainty, that we possess an exclusive formula for producing a high temperature resistant material that does not alter its coefficient of friction due to prolonged operational stresses.

 

Malossi MHR Wing Clutch Bell with Reinforced Cooling Ring. Better cooling, better balance, better take off and high speed operation.

 

The clutch bells with reinforced cooling ring consist of a finned annular reinforcement producing excellent heat dissipation caused primarily from stand still starts and quick accelerations from low speeds.

 

This technological innovation resulted from extensive testing within the Scooter racing circuit.

 

The clutch bell design is based on the following principals:

 

Greater heat transfer surface area (finned section) lowers the working temperature of the clutch bell which dramatically increases the systems durability.

 

The clutch system is enormously stressed in extreme conditions.

 

That is why Malossi has fine tuned the Wing Clutch Bell to protect your clutch.

 

We must not discard the fact that the finned reinforcement ring is also a safeguard against failure. It has been designed to resist the elevated centrifugal forces due to large rotational speeds generated by high performance engines. Keep in mind that centrifugal force increases by the square of the rotational speed.

 

Technical Specifications

 

Forged Steel Alloy

 

This clutch bell has been developed and manufactured in Malossi's Calderara di Reno engineering plant using proprietary processes.

 

Machined from a single steel alloy-forging, surface hardened and tempered, no welds, these new clutch bells feature an innovative manufacturing process and attention to the finest details guarantee a highest quality product.

 

Designed and developed by Malossi's engineering department and handed over directly to Malossi manufacturing, where the latest generation of Numerically Controlled lathes convert the 3-D solid models into final products.

 

The clutch bell machining process starts with a forging and exits the NC lathe completely finished, ready for heat-treating and wear resistant/anti-corrosion surface treatment, with no human intervention.

 

Technical Specifications

 

Forged clutch bell, without welds, made of 39NiCrMo5 steel, nitrogen surface hardened with an antioxidant surface treatment.

 

Machined finned reinforcement corona enhances heat dissipation, protecting the clutch's friction material, tested to over 20,000 RPM.

 

Radial scraping holes added to the contact surface, sized and positioned to continually clean the clutch's friction material.

 

Original system concept with openings designed to create dynamic ventilation and offering the possibility to adjust the internal clutch settings.

 

Highest levels of finishes and extreme close tolerances maintained.

 

Working Surface Tolerances

 

Surface finish Ra 0.5 µm

 

Circular Runout: 0.05 mm

 

Circularity: 0.08 mm

 

Balancing: 0.5 g