Arrive & Drive Karting to Owner Drive, WHERE NOW???

Making the transition from arrive and drive or even simply becoming an owner driver of a go kart for me is quite daunting. Being poor at any kind of mechanics and very little understanding of engines, moving parts and anything that requires a spanner is not really very useful when you are looking to race or even test a kart.
Not only that, Josh is going from a fast lawn mower into a serious racing go kart. Can he handle the power, will the extra grip demand too much physical energy from him, will he bin it???
The first part, see more parts to see how we get on.