A ported cylinder from Tivedens Motor, our sharpest cylinder for fan-cooled engines.
S3 porting is based on NTS small 60cc cylinder for fan-cooled Sachs, mainly with hand gear.
Bench tested by Agge to give about 6.9 to 7.3 hp depending on what else you hang on it.
The cylinder is made to run with a 17mm carburetor of SSB type (church port) and 32mm exhaust system with M40 exhaust nut.