thanks for your input guys, I will purchase a cigarette socket and hot wire it to the 6 volt battery. I have with me a tom tom cigarette lighter plug with usb female connection. I do believe that the motorcycle usb port is of sufficient amperage, but the operation seems dodgy. I'll let you know how it goes.
Seems a big day today we are now in the North York Moors National Park having travelled about 100 miles, I'm in the local pub and I believe they are speaking English but there's nowt I understand! cheers Russell
Location: back in the UK in Primrose, going to guildtown !