Hi blacknails, Welcome along. There are a good few members down that way, and I know that part of the world very well and there are some great rides to be had.
Gearbox design is very simple, most faults are an easy fix. Just tell us the problem in a bit more detail.
Head over to the intro section, tell us a little more about how you got your bike. Years ago I collected a Plunger A7 from Foxhole, near St Austell, in the back of a Ford Capri. That was a bit crowded. It's been downhill ever since!
Swarfy.