The battery was low, it only clicks on the starter.Charge it, and it starts, but having run for a while ,it won't start again, just clicks, even though the head lights will be bright for a couple of hours. Put new battery on, started, same thing. I was wondering if the generator is flattening it, because the leads or on the wrong way ?? its wired NEG earth at the moment, but don't know if it's been changed when it had a 16oo engine fitted befor I bought it. What do I try next ???