Description
Cylinder Naraku 155cc aluminium forged piston Yamaha Cygnus / BW's 5Ml 4V - tuning cylinder for Yamaha Cygnus / BWs 125cc (5ML - 4 valves).
It is a top quality aluminium Big Bore tuning cylinder with 58.5mm bore. All necessary gaskets are included. More displacement, in this case 155cc, will give your engine considerably more power, torque and acceleration will get nicely boosted. The hard chrome plated aluminium cylinder has excellent thermal properties.
The cylinder comes with a top quality forged piston - hard-wearing, low-friction, with a raised skirt for higher compression.
- 155cc - 58,5mm bore
- for Yamaha Cygnus / BWs 125cc with 5ML engine
- cylinder head is NOT included
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: Sport
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.
The products listed under Sport yield better performance than Original parts. They may have technical differences, such as the use of higher quality materials, a larger displacement or a performance-enhancing design. They are suitable for everyday use and have a long service life.
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.
