Description
2Fast 100cc Cylinder Minarelli AM6
2Fast has firmly established its position on the automatic scooter market and is now venturing out onto the market for 50cc bikes. And it doesn't get much more serious than this: the 2Fast 100cc Minarelli AM6 cylinder.
This high-end race cylinder pushes an unbeatable 100cc displacement, made possible by a 52 mm bore / 52 mm piston (with 14 mm wrist pin) and a 47 mm stroke (for 95 mm conrod). The Nikasil-coated aluminum cylinder comes with 6 transfer ports and a split exhaust port. It’s paired with a two-piece cylinder head, featuring the signature blue anodized cap.
The 2Fast 100cc kit ranks among the most powerful +80cc race kits on the market. That means it needs the right setup: a matching exhaust is a must, along with a bigger carb and a quality inner rotor ignition.
Note: To make room for the wider cylinder base and long-stroke crankshaft, minor engine case machining is required. You'll also need 107 mm cylinder studs.
Specs – 2Fast 100cc Racing Cylinder AM6
Aluminum cylinder, 52 mm bore / 47 mm stroke / for 95 mm conrod
1-ring Vertex piston, 52 mm, 14 mm piston pin
6 transfer ports / large bridged exhaust port
Aluminum cylinder head, 2 mm squish clearance
Compression ratio: 1:16
Case machining required
Not approved for road use
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.