Engine 025 - what is it characterized by? What are the specifications of this drive? Is a motorcycle a good choice?

The 025 engine is a popular powertrain derived from the redesign of the S238ZB4 engine. The previous model of the engine already used a foot shifter, which has become almost standard. For this reason, the design of the 025 engine has undergone a major modernization. The original motorcycles Romet, Komar and others had a completely different motor housing on the magneto side. The method of fastening the springs of the shock shaft used for firing from the machine gun has also been changed. For lovers of classic automotive engineering, this engine is now a real find! Check!

Mosquito, moped and engine 025 - years of manufacture and technical data

Initial production of the successor to the S38 engine ran from 1983 to 1985. It was then that the engine was installed on Romet 100 and Romet 50m³ Pony mopeds, i.e. on a popular moped.

1. Power at the level of 1,4 hp and a maximum of 4000 rpm. these are the main features of this device.
2. The cylinder bore is 38mm and the piston stroke is 44mm.
3. The working volume is 49,8 cm³.

A simple design made it possible to install a GM 12F1 carburetor with a 12 mm inlet diameter. Unfortunately, the suction squelch was not used in this case. However, this was often the obligatory connection of the carburetor to the car's frame. Wet double disc clutch with plastic inserts is located directly on the crankshaft of the engine.

Engine 025 and its electrical system

Wiring on mopeds with 025 engine is simple. The three-coil magnet generator generates 20W of power and 6V. It is located right under the left engine cover for easy access.

Is it worth investing in the 025 engine? Burning and user reviews

Although the 025 engine is already a vintage drive, there are still many aftermarket parts available on the market. Even if you have an old car, you can easily repair it. The big advantage of the 025 engine is its low fuel consumption, which is 2 liters per 100 km.

Do you appreciate old moped engine designs? Be sure to check how the 025 engine works in practice, and make sure that even a drive that is several decades old can be functional and a pleasure to drive.

A photo. main: songoku8558 via Wikipedia CC BY 3.0 (screenshot: https://www.youtube.com/watch?v=i1Uo9I6Qbhk)