1947-1952 – Harley-Davidson Model ST and STU – 125cc two-stroke engines
Model S was a copy of the DKW RT125 given to Harley-Davidson as war reparations. More than ten thousand were sold in the first year of production.
1953-1959 – Harley-Davidson Model 165 – 165cc two-stroke engine
1955-1959 Harley-Davidson Hummer ‘ – 125cc two-stroke engine
The ‘Hummer’ was a redesigned “B” engine with the old 125 cc capacity. Extremely basic specification: no battery, horn operated by rubber bulb, no turn signals, no brake light. Last 125 cc American Lightweight.