This the off-the-road model based on the SST 350. The frame and engine are almost identical to the SST 350, only the front and rear-springs are adjusted for the off-the-road purpose. The hydraulic front-brake has been replaced for the normal brakes of 160mm. A big diference is the maximum power that the SX delivered at 7100 rpm: different exhaustpipes.

This model was marketed in 1979 after the closing of the factory. Cagiva also sold this model with HD-Cagiva on the fueltank. Price was f 4.495,-

Source: Aermacchi-De Gevleugelde and AMF-Harley-Davidson 1972-1978 by Jaap de Jong