21. The saddle was pulled up and the footrests folded out ready to push start the two stroke engine and ride into action. 22. Enslow was riding a customized Service Honda, which is basically a Honda 250 dirt bike with a 500cc two stroke engine . 23. The standard engine is the Rotax 503 two stroke engine or Rotax 377, with a Volkswagen air-cooled engine optional. 24. Three piston rings suggest that it is a four stroke engine while two piston rings suggest that it is a two stroke engine . 25. Purely turbocharged two stroke engines may thus have difficulty when starting, with poor combustion and dirty exhausts, possibly even four-stroking. 26. The four stroke engine is more efficient when running at full throttle, while the opposite is the case for the two stroke engine . 27. The standard engine is the Hirth F-30 two stroke engine , with a Volkswagen air-cooled engine with reduction drive optional. 28. Some 49 cc two stroke engines were built under licence from Puch, and fitted into the innovative Falco, one or two seat moped. 29. The "'Coronet "'was a three-wheeled microcar with a rear-mounted Excelsior two cylinder, two stroke engine . 30. The "'Powerdrive "'was a three-wheeled microcar with a rear-mounted Anzani two cylinder, two stroke engine .
