Complex sentence: A sidecar-equipped 6/1 won a silver medal in the 1933 International Six Days Trial and went on to win the Maudes Trophy for 1933, but the 6/1 was a commercial failure, selling fewer than 600 in two years on the market.
Split into simpler sentences: A sidecar-equipped 6/1 won a silver medal in the 1933 International Six Days Trial and went on to win the Maudes Trophy for 1933. The 6/1 was a commercial failure, selling fewer than 600 in two years on the market.