nuby ?

Discussion in '2-Stroke Engines' started by moped mike, Sep 14, 2016.

  1. moped mike

    moped mike New Member

    hey guys, new to these bikes, why does my engine drip black oily gas from the muffler when I shut it off? seems to run ok
     

  2. skyash

    skyash Active Member

    It's oil from the petrol .when the engine fires some oil does not burn off and comes out the muffler.the oil is to lubricate the engine if it's a 2 stroke 66cc. if it is you must put oil in the petrol ..if you just use petrol no oil the engine will over heat and stop working
     
  3. skyash

    skyash Active Member

    Do you know how much oil is in your petrol.? Or what kind of engine you have?
     
  4. crassius

    crassius Well-Known Member

    common for it to drip more if used for short rides - 10 mile rides will heat muffler enough to burn most of it out before it can drip
     
  5. FurryOnTheInside

    FurryOnTheInside Active Member

    ..to which I will add if you mix the fuel then leave it sitting in a can too long, the oil will separate and not do its job. As I found out with my petrol scooter when I didn't ride it for a few weeks (pre- internet days) after it broke my shoulder.
     
  6. skyash

    skyash Active Member

    Maybe not if his usingto much oil
     
  7. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    How much of the oily stuff are you adding to a gallon of gas?
    How many miles on your motor?
    If you are following the bad advice of adding 8oz to a gallon that
    may be why you bike is marking it's territory............
     
  8. moped mike

    moped mike New Member

    I mix it 32 to 1, yes it's a 66cc 2 stroke, thanks for reply
     
  9. KCvale

    KCvale Motorized Bicycle Vendor

    Throw an NGK 5944 (BPR7HIX) iridium spark plug in it, that will make sure all the fuel that goes in gets burned.
    As a bonus, you get a little more compression, so more power.
    CAUTION, this only works for slat head engines!
     
  10. Holly

    Holly Member

    This has me worried. I've been down from surgery for 3 weeks and the bike is sitting. Anything I can do to mix it up again when I get to ride again?
     
  11. KCvale

    KCvale Motorized Bicycle Vendor

    Just shake the gas can for the same reason you'd shake an Italian Dressing bottle, to remix it.
    It's the gas itself that 'gets old' and looses some of it's punch, not the mix.
     
  12. FurryOnTheInside

    FurryOnTheInside Active Member

    What KC said.. Also I left it in a petrol can for several weeks while my shoulder healed enough to pull the starter cord, and presumably then poured just gas off the top of the can when I filled the scooter's tank.. This was pre-internet when I didn't even know what a tickle button was, lol.
     
  13. Holly

    Holly Member

    Ok. Thanks guys. I'll just shake the bike around too. :D
     
  14. moped mike

    moped mike New Member

    I put in an iridium plug and it made no difference, in fact it seems to run better with a normal plug. guess it's normal the way the muffler is pointing down.
     
  15. jaguar

    jaguar Well-Known Member

    increase the iridium plugs gap to .030"
     
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