I have a 1974 MAR 250 with standard Motoplat stator (red. No battery) 

How do I wire the lights? I have Red, Green, White, Blue, and black wires.

Sid

Manual says the red goes to a 15 ohm resistor and I think you need a rectifier to power the lights from the mighty 6 volt system when you rev it up real good.

Thanks. 

 

If you google ossa wiring diagram you will find one  -  the blue andblack are for the ignition to the coill, blue on the bigger spade terminal

if you intend using the lights to ride the bike in the dark, a candle would be a better option.  The combination of not seeing something until the last minute and poor brakes isn't something I'd like to tangle with....  Fit some mountain bike lights

Dead loss battery system using modern battery and LED lamp tech is going to out perform anything you could run off the engines stock electrics.