Mpg is waayyy low

Discussion in 'Motorized Bicycle General Discussion' started by fume555, Sep 5, 2008.

  1. fume555

    fume555 New Member

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    I'm running full tank 20:1 still on my first gallon and after riding about 30 miles I'm already at half tank. This must mean I'm averaging 60mpg which is half of what kit said (150). Is it because of the oil mix ratio that causes it to burn up so fast? Is it normal to kill your engine by choking it all the way and is it normal if the engine itself smokes(not exhaust smoke)?


    (c)
     
    #1 fume555, Sep 5, 2008
    Last edited: Sep 5, 2008
  2. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    I doubt 150 mpg, but 60 mpg does sound like you are leaking or sucking raw fuel.

    Expect maybe about 80 mpg on a bolt on sprocket HT engine set-up.

    I would start reading on tuning.

    New plug and wire.
    Needle on lean slot.
    Smaller carb jet.
    Look for carb leaks, defects.
     
  3. Ilikeabikea

    Ilikeabikea Moderator
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    So do you have a 1 gallon tank? Most of them I've seen are just 1/2 gallon tanks..............................
     
  4. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Interesting perspective! :p:D
     
  5. jasonh

    jasonh New Member

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    what he said :)
     
  6. OSCAR383

    OSCAR383 New Member

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    if you only have a half gallon tank youd be at about 120 mpg about what i get and that aint bad.
     
  7. fume555

    fume555 New Member

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    Whoops, I mean I got a half gallon tank Does that mean I'm getting 60mpg
     
  8. Ilikeabikea

    Ilikeabikea Moderator
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    That means your getting 120 mpg..................
     
  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    New engines use more fuel, so do ones that are running too rich.
     
  10. fume555

    fume555 New Member

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    How many gallons/miles does it take to fully break my engine in? My top speed as of right now is about 30 mph. How much increase will there be once my 80cc is broken in?
     
  11. Ilikeabikea

    Ilikeabikea Moderator
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    You should pick up another 3 to 5 mph. What you will really notice is how much smoother it runs and better acceleration......................
     
  12. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    It will take at least 2 tanks IMHO.

    Unmodified? A couple more MPH. Maybe 35 or so.
     
  13. fume555

    fume555 New Member

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    (c)
    So once I finished running 2 gallon tanks 20:1 mix, will it be time to switch to a different oil mix ratio? And what oil mix ratio should that be?

    (c)
     
  14. Pablo

    Pablo Master Bike Builder & Forum Sponsor

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    Depending on the oil 30:1 or so.
     

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