OS has developed a new generation of four-stroke single-cylinder motors with the FS-SURPASS series. Their power in particular significantly exceeds the predecessor OS four-stroke motors of the same capacity.
The supplied silencer delivers quiet smooth power with the distinctive four stroke sound.
A superb engine that will give years of trouble free life. It is after all an O.S.!
To download a PDF of the parts listing please click here
Spares and Accessories for your O.S. Engine
If you need any spares or accessories for your engine that are not listed on the site please contact us for a price and availability.