Hi I’ve fitted the pull start and it was no bother to do. Thanks about telling me to check the screws in the inside they had become lose due to the vibrations when I was at the shop I bought the 2 Speed Transmission and I’ve tried to fit it but there is one thing I am not sure about it shows I need to cut bits out of the rear Differential casing am I needing to do this as I have put it together and don’t see why it needs cut out.