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50cc Bike
Article no.: MK824A0520

Metrakit Piston "SP3" 70cc (A) Yamaha Aerox / MBK Nitro

Sorry, this Item has been Discontinued

This product is no longer being manufactured, so unfortunately we can no longer offer it.

However, we would like to help you find an alternative. Please take a look at other products within the same category or contact us so we can help you with selecting the right product.


Metrakit Piston "SP3" 70cc (A) Yamaha Aerox / MBK Nitro. Spare piston for the 70cc SP tuning cylinder by Metrakit, renowned producer of racing and tuning parts and complete bikes for young riders. Pistons are subject to heat, friction and high loads and have to be replaced from time to time.

  • for 70cc SP series
  • 47mm
  • complete with pin, rings and circlips
  • for Minarelli LC


Whenever you mount a new component, you should replace all the gaskets as well.

Questions about the product
Notes and Safety

When to replace the piston?

To find out when the piston on your motorcycle, scooter or moped needs to be replaced, it's best to check your bike's manual. You can also keep an eye out for certain symptoms such as loss of compression, loss of power or oil consumption (only for a four-stroke piston).

Extending Piston life

To extend the life of the piston and reduce cylinder wear, it is recommended that you replace the piston rings on an alternating basis. This method maximizes piston life and improves engine performance.

It is important that you replace cylinder gaskets and piston circlips each time you disassemble the cylinder and piston. Failure to do so can result in oil leaks and engine damage.

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.

Technical details
Metrakit Piston "SP3" 70cc (A) Yamaha Aerox / MBK Nitro
Article no.MK824A0520
Weight0,11 kg
Product typePiston
Tuning levelSport
Piston pin10 mm
Cylinder materialAluminium
Conrod lengthStandard
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