Description
Malossi Testa Rossa 70
Famous Big Bore cylinder by tuning expert Malossi: Malossi Cylinder Kit MHR Team Testa Rossa 70cc for Minarelli horizontal (Yamaha Aerox / MBK Nitro), the one with the red head (cylinder head cover).
Design Malossi MHR Testa Rossa cylinder kit
The Testa Rossa is based on the MHR Team II, with 7 transfer ports, 1-ring piston and divided (bridged) exhaust port. One of its strong points is the modified exhaust port design with thin bridge and large exhaust surface. The cylinder head is divided (modular) and is topped by the eye-catching anodized red cylinder head cover.
Unlike the flange-mount version which is only compatible with Malossi's racing crankcases, this version is mounted via stud bolts and can be used with standard engines and cases (as well as with the C-One). There's some milling to be done, however; instructions are in the manual.
In raw numbers, the Testa Rossa is quite the beast - 22hp without any modifications. It needs a matching set-up, though - high-end exhaust, racing ignition, large carburetor (28mm) etc. Skilled tuners will be able to get 26hp out of this phenomenal kit.
Overview Malossi testa rossa kit
- displacement: 70cc
- 7 transfer ports
- bridged exhaust
- bore: 47.6mm
- 1-ring piston, 12mm piston pin
- stroke: original
- connecting rod: 85mm
- 4-hole exhaust flange
Malossi Testa Rossa
The Testa Rossa is the latest generation of high-end cylinders from Malossi. The series is the successor to the famous MHR Team, which has long been a reference for scooter tuning and racing. As the name Testa Rossa suggests, the cylinder head is red, which could possibly be interpreted as a small allusion to another famous Italian brand.
The Testa Rossa cylinders represent the state of the art and are extremely powerful. The cylinders were originally introduced with the C-One and RC-One crankcases, but are also compatible with original crankcases, provided they can be machined to fit the new components.
Main features of Testa Rossa cylinders
- 7 transfer ports
- Bridged exhaust
- 1-ring piston
- Two-piece cylinder head with special combustion chamber (improved water volume)
To ensure reliability and top performance, the Testa Rossa must be used with the appropriate tuning components and re-adjusted: reinforced crankshaft (racing or high-end), a suitable tuning exhaust and a larger carburetor and intake.
How to Install a cylinder on a scooter, motorcycle or moped
The cylinder or cylinder kit is the heart of the engine on scooters, motorcycles and mopeds. It consists of a cylinder, a piston with piston ring(s), a cylinder head and gaskets needed for installation.
The service life of a cylinder depends on whether it has been fitted correctly.

Tuning Level: High End racing
We categorize our products into different performance levels Original, Sport, Racing and High End , so that our customers can choose the right parts for their setup. It is really important to combine parts that belong to the same tuning level, this is especially true for cylinders, crankshafts and exhausts.
High End Racing products are exclusively designed for racing and should only be handled by tuning pros with the appropriate technical know-how. High-end racing parts often require modifications or machining of certain elements to accommodate the often larger components (larger crank webs, larger intake, etc.). Whether you stick with 50cc or increase the displacement, high-end racing parts offer much higher performance than the original parts and are the most powerful tuning parts.
Note: To ensure the reliability of the engine, it is important that the parts are compatible and that you do regular maintenance on your two-wheeler.
Aluminium cylinders
Aluminium cylinders are more powerful than cast iron cylinders, but require more regular maintenance and must be combined with different components such as a reinforced crankshaft and a larger carburetor.
How to run in an aluminium cylinder?
Aluminium cylinders should be run in for about 200 kilometers , and you should use a fully synthetic engine oil.
Note: To ensure optimum performance and reliability, it is advisable to measure the squish clearance. Just have a look at our tutorial How to adjust squish clearance.
Cylinder Malossi MHR Team Testa Rossa 70cc Yamaha Aerox | |
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Article no. | M3115390 |
Weight | 2,00 kg |
Series | MHR TEAM, Testa Rossa |
Brand | Malossi |
Product type | Cylinder kit |
Tuning level | High-end |
Displacement | 70cc |
Homologation | No |
Piston pin | 12 mm |
Cylinder material | Aluminium |
Bore | 47,6 mm |
Stroke | Original |
Conrod length | 85 mm |
Spark plug thread | M14 long |