Sport moped

They were created to circumvent UK legislation, called the "Sixteeners Laws", aimed at taking young motorcycle riders off the road.

To achieve higher performance, motorcyclists frequently modify the engines, such as installing a big bore kit which raises the displacement.

[citation needed] These models were produced from 1972 onwards by Japanese manufacturers Honda, Yamaha, and Suzuki, as well as European companies such as Puch, Fantic, Gilera, Gitane, and Garelli.

The most famous of these versions was the Yamaha FS1-E.[4] They included roadsters, enduro and motocrossers, cafe racers and choppers or Scooters,[5] and led to a boom in motorcycling similar to the early 1960s rocker period.

The government passed further legislation in 1977 which was more restrictive, limiting mopeds to a weight of 250 kg (550 lb) and a top speed of 30 mph.