Time them wrong and they can even start backwards!! My 360 Yammy trail nearly broke a guys foot. I warned him about kickback and he laughed and said he used to own a Trumphy. Wasn't laughing a little later!I have a white thin plastic jobby, no idea where I got it. First used to stop my XT 500 from trying to brake my leg then onto big bore 2 stoke dirtbikes for exactly the same reason. Time them wrong can focus the mind when trying to kick-start them.
Yea, just an iPhone app, a magnet and some tape to hold it all together !21st century there Gareth! Whats that all about? An app or something?