1978 SSt 350
This 350cc one-cylinder air-cooled 2-stroke is the end of the 2-stroke model-line that started with the 90cc and via the 100, 125, 175 and 250cc it's Waterloo found with the 350cc. It was not a new class model for AMF-Harley-Davidson and even in race-contests a 350cc existed, even a 391cc and a 500 cc. All 2-stroke models.
This 350cc has a bore and stroke of 80 x 68 mm. The gearbox is adjusted to the bigger power and the engine is made for it: lots of rubber between the cooler-ribs to avoid most of the resonance. This model was marketed in 1979 in the Netherlands under the name AMF-Harley-Davidson and later under the name HD-Cagiva. They sold new for f 4.495,-