Description
77cc cylinder Airsal Xtrem Yamaha Aerox
Airsal Xtrem 77cc cylinder kit for scooters with Minarelli horizontal LC engine. As the little brother of the Xtrem 88cc, the cylinder does not need to be used with a long-stroke crankshaft, but should be combined with a reinforced model.
Advantages of the Airsal Xtrem 77
The red-painted 80cc cylinder is a pure racing cylinder with plenty of power and excellent torque. A displacement of 77cc means a lot of power, and with the right components you can easily get up to 20 hp out of this high-end racing cylinder. Due to the long port timings and the large volume, we recommend a large carburetor - 28mm - 30mm would be advisable.
- Aluminum cylinder with 7 transfer ports
- Exhaust with bar
- Vertex 1-ring piston (12mm piston pin)
- Bore 50mm
- High-compression cylinder head, one-piece
The supplied gasket kit contains several base gaskets to achieve the ideal squish clearance.
Note: For the installation of this Airsal 77cc Xtrem cylinder, the crankcase must be machined to fit the cylinder base (55mm). A crankshaft for 12mm piston pins is also required.
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.