Add punctuation: 50 cc machines back then were not specialized speedway bikes but street bicycles fitted with small engines and the riders were not teenagers but adults fully equipped in leather suits The top speed has been about 30 to 35 kph
50 cc machines back then were not specialized speedway bikes, but street bicycles fitted with small engines, and the riders were not teenagers, but adults fully equipped in leather suits. The top speed has been about 30 to 35 kph.