hello can`t type for S--t ! lol as i was saying swapped mpotors trying to get out of pulling magnetos and backing plates from swap!trouble is theres an extra wire on the 75 lighting coil You have a yellow with white stripe,a green with a red stripe and a green wire with a white stripe this is the extra one What to do besides change whole harness or magneto plates?also i cant find a 1976 DT400 wiing diagram for DT400C. Help?

This post might help, he's got the same bike, circuit diagram at the bottom.

Viola "