Thanks for the reply.
I would like to keep this bike but change the gearing slightly as to make pedal kicks easier.
I have a front brake so that's a good thing.
I rode BMX a long time ago for about 15 years so it feels slightly different to that. I was thinking this bike could be a bike that could do it all, skatepark, dirt jumps and if I changed the gearing street trials.
I thought that about the driver on my rear hub.
I've had a look about for a rear wheel but I don't really know what I'm looking for.