Description
Piston Doppler Vortex 2 piston rings 39.9mm Derbi Euro3.
Doppler is a brand for high quality sport and racing parts as well as styling parts for 50cc two-wheelers.
If the cylinder is no longer working properly, it is not necessary to replace the entire cylinder, in many cases it is enough to replace the piston including piston pin, piston rings and clips. In racing engines, it is extremely important to keep to the revision times, as the piston has very little piston clearance and is equipped with a very fine piston ring.
Aluminum is used for high quality cylinders. The raceway is coated with an extremely hard and resistant coating. The advantages of an aluminum cylinder are better heat dissipation and low weight, in addition, the tolerances of the piston clearance are kept low by the material, which leads to more power. If the piston rubs (slightly), in many cases it is not necessary to replace the entire cylinder but only the piston, because the coating is very resistant.
Technical details:
- Tuning level: Sport
- Material: Aluminum
- Displacement: 50cc
- Bore: 40 mm
- Stroke: Original
- Piston pin: 12 mm
- Connecting rod: Original
- Homologation: ECE Homologation
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.