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smoke coming from magnito?


Discussion at Motorized Bicycle Engine Kit Forum in the Motorized Bicycle General Discussion forum. my girlfriends spooky tooth bike just all of a suddin just lost a bunch of power. it idles great, reves ...
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Old 08-21-2008, 07:56 PM
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Default smoke coming from magnito?

my girlfriends spooky tooth bike just all of a suddin just lost a bunch of power. it idles great, reves up ok but with a load on it it just wont get up and go. was running fine before.
so i cleaned the carb, and air filter. replaced the fuel filter, even took the head off to see if there was any marks on the walls. all looks good. when i started it it was still doing the same thing. I did notice puffs of smoke coming from the magnito hole where all the wires come out. Is the magnito buning up? could this be the problem? i took the cover off i did not see any oil or anything coming from the seal. all clean. could the magnito be whats causing this bike to run so poorly just like that?
has anyone ever had this "smoke thing" happen to them?
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Old 08-21-2008, 08:53 PM
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Default Re: smoke coming from magnito?

What does the smoke smell like?

a) insulation/electrical

b) fuel/oil
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Old 08-21-2008, 09:41 PM
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Default Re: smoke coming from magnito?

i cant tell. it was smoking while the bike was running and its real close to the pipe. so i just smell fumes
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Old 08-21-2008, 11:08 PM
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Default Re: smoke coming from magnito?

I think you blew the crank seal...
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Old 08-21-2008, 11:37 PM
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Default Re: smoke coming from magnito?

is that a hard job? i dont see any oil at all inside the cover......
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Old 08-21-2008, 11:40 PM
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Default Re: smoke coming from magnito?

There was just a thread about this not too long ago... Does anyone remember?
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Old 08-21-2008, 11:47 PM
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Default Re: smoke coming from magnito?

if it is that, will i have to split the case and get into all sorts of things i know nothing about?
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Old 08-22-2008, 01:46 AM
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Default Re: smoke coming from magnito?

Here is the only thread I know about crank seals

crankshaft seals
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Old 08-22-2008, 08:16 AM
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Default Re: smoke coming from magnito?

I would investigate further. Don't just assume it's a crank seal.
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Old 08-22-2008, 08:50 AM
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Default Re: smoke coming from magnito?

run the motor with the magneto cover off and see if the smoke is really coming from the magneto, or somewhere else.
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