smoke coming from magnito?

Discussion in 'Motorized Bicycle General Discussion' started by jf30cp, Aug 21, 2008.

  1. jf30cp

    jf30cp New Member

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    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?
     
  2. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    What does the smoke smell like?

    a) insulation/electrical

    b) fuel/oil
     
  3. jf30cp

    jf30cp New Member

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    i cant tell. it was smoking while the bike was running and its real close to the pipe. so i just smell fumes
     
  4. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    I think you blew the crank seal... :rolleyes:
     
  5. jf30cp

    jf30cp New Member

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    is that a hard job? i dont see any oil at all inside the cover......
     
  6. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    There was just a thread about this not too long ago... Does anyone remember?
     
  7. jf30cp

    jf30cp New Member

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    if it is that, will i have to split the case and get into all sorts of things i know nothing about?
     
  8. Dave31

    Dave31 Moderator
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  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I would investigate further. Don't just assume it's a crank seal.
     
  10. jasonh

    jasonh New Member

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    run the motor with the magneto cover off and see if the smoke is really coming from the magneto, or somewhere else.
     
  11. jf30cp

    jf30cp New Member

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    i did, i cant see the smoke when the cover is off. but i do know for a fact that i saw smoke come from that hole. little puffes. not a lot.
     
  12. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    The fact that it's puffs and has continued on tells me it's a seal issue.
     
  13. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Ride it, see what develops.
     
  14. skullygrrl

    skullygrrl New Member

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    I'm going into withdrawals without my bike!!!!! I hope it is the crank seal and its fixable....Thank you Norm for taking a look at it :)

    "man I hate driving my car"..........
     

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