It is a two-stroke engine with a capacity of 49.9 cm3 and power 2.6 kW. Bore / stroke: 38 / 44 mm.
One block included a three-speed transmission.
The engine was used in Jawa 20, 21 and 23 motorcycles manufactured by Považské strojárne (Slovakia).
Year of production: 1966 - 1982.
Author of the design: Bc. Tomáš Navrátil (student - Department of Machine and Industrial Design)