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Intermittent headlight

1K views 10 replies 4 participants last post by  DD23 
#1 ·
Just purchased a 1981 CM400a. Bike appears to be in fairly good condition with the main issue being it running rich and a the headlight sometimes working. To give more detail is it just sometimes turns on and works fine and other times it doesnt, my first guess would be a bad ground but im not sure about the wiring on bikes.
 
#8 ·
You can disassembly and clean. Fix anything that looks questionable and should be good. Besides that, it depends on the condition of the wiring on the bike. I rewired my whole bike because I started having light issues and would fix it and another problem would spring up a few weeks later. Started to get unreliable after awhile and I was worried I'd get stuck somewhere one day. When I did the new wiring I found a few bad grounds, cracked wires, and several questionable connections. If yours is like this then I would consider replacing with new wiring. Perhaps you'll be able to get leds which draw less power from the system.
 
#10 ·
2 Philips head type screws from the bottom. I say "type screws" because while they look like Philips they're actually JIS. Likely the screws are pretty well stuck in place so use an impact driver to break them loose.
 
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