Remove the plasic shroud think its four screws have a look inside if your not confident a good auto electrician the type that recon starters and altenators will fix it for you even if you buy a similar motor and switch the innards. The bowden cables can be bought at various length from any motorbike shop. If you run a series 1 you have to dig about a bit the factory is no help at all and the other guys who sell some spares wont tell you what they came off....