Cylinder MXS Racing MXS Racing 70cc piston pin=12mm Yamaha BW's / Slider
incl. tax, plus shipping
Description
MXS Racing 70cc cylinder
MXS Racing Kit - Cylinder, Piston and Cylinder Head - designed and developed by MXS, Maxiscoot's Racing Department.
The Nikasil-plated aluminium cylinder has 5 transfer ports and an oval exhaust port. It comes with a HQ single-ring piston (12mm pin) and a high-compression cylinder head (port timings: 196°/132°/134°).
Performance MXS Racing high-end cylinder Minarelli vertical
With 19hp out of the box and in combination with the right set-up, but without any major modifications, this kit will wow even the most demanding pilot.
To unlock the full potential of this cylinder kit, we recommend a 28mm carburetor (at least 21mm), a "Big Valve" reed valve, a digital inner rotor ignition and a high-quality racing crankshaft.
You will have to use a high-end acing exhaust to go with this kit, otherwise the cylinder will overheat! We recommend the MXS Racing 2014, Stage6 R1400 or at least the Yasuni Carrera 16 (flange diam. 26mm and stinger pipe diam. at least 16mm!).
The kit comes with complete piston (pin, circlips and ring included) and the proper gaskets for mounting. To make sure to get maximum power and reliability out of this cylinder kit, you should definitely adjust "squish clearance" when mounting it (cylinder spacers are included).
For vertical Minarelli engines.
Bore: 47.6mm - Stroke: 39mm
Note: piston pin = 12mm.
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 MXS Racing MXS Racing 70cc piston pin=12mm Yamaha BW's / Slider | |
---|---|
Article no. | MXS31445476 |
EAN | 4051272327896 |
Weight | 0,30 kg |
Brand | MXS Racing |
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 | Standard |
Spark plug thread | M14 short |