Description
Athena 80cc Cylinder Kit “Sport Pro” (43mm stroke) for MBK Booster / Stunt (Minarelli vertical).
The kit includes:
- Nikasil-plated Aluminium Cylinder, with 5 transfer ports and “simple” trapezoid exhaust port
- One-Ring Piston, 12mm pin
- High-Compression Monobloc Cylinder Head
- Gasket Kit for mounting and adjusting squish
Being the “big brother” of the 70cc Sport pro cylinder kit, this kit has the same technical specs, but has to be used with a 43mm crankshaft (and 85mm connecting rod).
From the get go this kit will get you 80cc! Just like the 70cc, this “80cc Sport Pro” has plenty of torque at mid rpm range and, consequently, very impressive acceleration.
With a 21mm carburetor and a racing exhaust you can easily get 14/15hp on vertical Minarelli engines. It is also a cylinder ideally suited for working on due to its capacity and top quality workmanship.
Note: just like with all aluminium cylinders, you’ll have to adjust squish to ensure reliable performance and maximum power.
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: 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.
Racing products are designed for a more extreme uses and are developed primarily for racing. Whether you stay at 50cc or increase the displacement, the corresponding Racing parts produce much higher performance than the original parts in order to achieve maximum power.
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.
Spare Parts
- NGK
Spark Plug NGK BR9HS (4522)4,10 €Ready for dispatch shortly - Athena
Piston Athena Sport 70cc d=47.6mm (A) 12mm Minarelli AM6 / MBK Booster40,00 €In stock - Athena
Cylinder Gasket Set Athena Racing / Sport 70cc Yamaha BW's / Slider6,90 €In stock - Athena
Piston Rings Athena Racing / Sport 70cc 47.6x1mm universal17,00 €Currently not in stock
