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1973 yamaha dt360 spark problem

This is a discussion on 1973 yamaha dt360 spark problem within the Yamaha forums, part of the Manufacturers category; hey guys i just bought a 1973 dt360. it has no spark and the guy before me couldnt get any ...


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Old 06-21-2006   #1
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Default 1973 yamaha dt360 spark problem

hey guys i just bought a 1973 dt360. it has no spark and the guy before me couldnt get any spark so he brought it to a professional place and they replaced the condensor. after about 5minutes of riding the bike lost spark agian. does anyone know what the problem could be?

thanks alot

Vin
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Old 06-22-2006   #2
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Default 1973 yamaha dt360 spark problem

I had a 1973 AT3, those bikes had a pretty sophisticated electrical system, including an alternator and electric start(which actually just reversed current to the alternator).

Anyway, I'd start at the plug and make sure it's the right one, and then work your way back upstream. My 125 used a B8ES, not sure about the bigger bike.

Is it still using the oil injection or has it been converted to pre-mix? Could be fouling the plug, what does it look like when you pull it out?
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Old 06-23-2006   #3
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Default 1973 yamaha dt360 spark problem

it still does have the oil injection. the plug looks fine.
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Old 06-25-2006   #4
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Default 1973 yamaha dt360 spark problem

Have you tried holding the base of the plug against the motor and kicking it to see if it indeed has spark? Make sure you hold it by the rubber and don't contact any of the metal on the bike.
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Old 06-27-2006   #5
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Default 1973 yamaha dt360 spark problem

ive tried that it has no spark at the plug
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