Speedway bikes are the same, they have to be push started or the back wheel spun up to fire up. No starter motor fitted to the engine.
Formula 1 cars are the same, all to save weight.
Quite fancy that female presenter Grace Webb they have on the ITV4 highlights show too

Michael Dunlop now the joint 2nd most successful TT rider now tying with John McGuinness and now just 3 wins away from the all time record held by his late Uncle Joey Dunlop, some achievement 👏