I have a custom 2008 m50 that I have built up from a writeoff. there were no gauges when I got it and I like the clean uncluttered look. the speedo is now a digital pushbike speedo rated to 200 k and works well, but I now have no fuel gauge. I am aware that the standard gauge is a series of bars but would like to mount a simple needle type fuel gauge. auto sparkies have told me that they need to know the resistance of the standard gauge but the haynes manual doesnt tell me this. any help or advice on what gauge to get would be greatly appreciated.