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I need to figure out how to eliminate a few electrical parts and just power starter and rear brake light. Came across this 81 honda cm 400 T that someone started. Would really like some help. I restored a 400 last year and like the power and sizs
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Wow thats in tough shape, what is it exactly you want to do, does the motor start?

see the three yellow wires coming out of the motor, those are critical. They should all have voltage output and you need to power a spark plug from somewhere, so at least one better be working.
See the thing with the fins on it, you can't make 12 volts DC without that part.
Without it; rig up your lights, power them dead loss off a big disposable battery, job done.
I have a sneaky feeling this bike won't be seeing a lot of night riding or rain riding anyway
good luck with the repairs
 

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Yes engine is good and as soon as I get ignition hooked up will check all wires..i guess I could remount electrical components and start from there...it will be a project for sure..thanks for your time...this 400 was in as bad as shape...
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is the alternator permanent magnet or electromagnet? If it's the latter, it needs a battery to operate.
 

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Tks, going to keep battery..hopefully can fine one on the smaller side... all electrial components are there and wiring all checks out as best as I can tell..starter relay coming and then I will know more...
 

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Am figuring this out as i go..but all wires check out so far and coil meets specks..starter relay did not..replace steering bearing and put handlebars back with the switches and will know more ..
 

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If it's a kick start model, it doesn't need a battery to run. Ignition is self generating CDI. If it isn't kick start model, your going to spend a lotof time oushing it to bump start
 

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If it's a kick start model, it doesn't need a battery to run. Ignition is self generating CDI. If it isn't kick start model, your going to spend a lotof time oushing it to bump start
Its not a kick start model. Does it charge the battery? Is the magnet is properly working?
 
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