My 1980 exciter 440 ran great last week. Today I went to start it and I have no spark! I need wiring specs and diagrams. Can anyone help? Also I have a 1979 exciter 440 with a 1973 motor in it. It will start but dies out within a couple of minutes. Any ideas? Help would be very appreciated. I live in IL and we don't always have enough snow to go riding.