Description
2Fast alu cylinder 90 Yamaha Aerox
2Fast, well-known among racing fans, is introducing a new racing kit: 2Fast Cylinder Kit 90cc Minarelli LC. A high-end "Hyper Racing" kit with 90cc displacement with 50mm piston (13mm pin) with 45.8mm stroke (and 90mm connecting rod).
Design 2Fast 90cc Racing cylinder
The top quality aluminium cylinder has 6 transfer ports and a bridged exhaust port. It comes with a modular cylinder head immediately recognizable thanks to its trademark anodized blue cover.
It is easily one of the most powerful +80cc cylinder kits on the market. As such, it is really important to run it with an appropriate high-end racing exhaust such as the 2Fast 86cc or the Stage6 R/T 90-100cc a 30mm carburetor (minimum) and a HQ digital internal rotor ignition.
Specifications 2Fast Aluminium Racing cylinder kit:
- aluminum cylinder stroke 44,9 / connecting rod 90 mm, 6 transfer ports
- bridged exhaust port
- aluminum cylinder head with 2mm clearance
- 1-ring piston 47,6mm with 12mm pin
- 2-screw flange
- compression ratio 1:16
Note: to mount the 2Fast 90cc Cylinder Kit Minarelli LC you'll have to mill in the crankcase to make room for cylinder base and crankshaft (45.8mm stroke). You will also need 102mm long cylinder studs.
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.