350cc Models (MachII)
The 350 was the shortest lived triple, and had a reputation for squirrely handling and peaky power output. At 44 HP it actually made two horsepower more than the later S3 400. It was virtually identical to the 250 model except for coloring and the top end of the motor. A common hop-up trick in the early days was to replace the top end of a 250 with one from the 350.