Can you unbridled your 48cc engine ?

Discussion in 'Motorized Bicycle General Discussion' started by Samy48cc, Apr 19, 2010.

  1. azbill

    azbill Active Member

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  2. KonaTitanMan

    KonaTitanMan New Member

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    Hey Samy, I thought I'd offer 3 other things to think about since you say you are new:

    1) It might be a good idea to try out your engine for awhile before you start thinking about mods and trying to break the sound barrier. Remember, the bike you put your motor on will STILL only be a bike (bike tires, bike brakes, etc.,) only it will be heavier. You may not think 30mph is fast until you are cruising with traffic and you find yourself rear-ending a car in front of you 'cause you can't stop short enough, or rolling off the road shoulder because you cannot corner as tight. Motor-bicycles are fun and economical but can be dangerous too. BELIEVE me, if you're just wearing a bicycle helmet, at 30mph the wind will be so loud in your ears you may not be able to even hear your engine!

    2) Check your state laws also on SPEED restrictions for motorized bikes. In my state the max limit is 25mph (though amidst other traffic I am too small a target for police radar). But, if you're cruising at 40mph a cop can nab you just on "visual estimate" and write you a "speed too fast for conditions" ticket rather than for a particular speed. With your past driving record a citation sounds like the last thing you would need.

    3) Also (lastly) you may wish to check closely with not only state laws but also any city ordinances of places you will be riding through. Though you might not need a motorcycle endorsement on your license you may still need a valid, active drivers license to ride your motor-retrofitted bike like my state does. If you need one you might be ARRESTED after being stopped for your Mach 5 speed....

    Just a couple things to think about..duh.
     
  3. matesrates

    matesrates New Member

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  4. K.i.p

    K.i.p New Member

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    .38mm (.015 x 25.4)
     
  5. matesrates

    matesrates New Member

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    Thanks for that
    same goes when you people say you have gaped spark plug .25...........
    How many mm is that????
    Sorry my feeler gauge only has mm
    Thanks for your helpbrnot
     
  6. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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  7. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    .25X25.4=6.35 or 6.5 will do.
     
  8. matesrates

    matesrates New Member

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    Thanks for you help joe

    Just confirming
    So when you guys say you "gaped your spark plug to 0.25"
    This is 6.35 mm ???????

    Because i gaped mine to 0.25mm very small gap

    Thanks againbrnot
     
  9. matesrates

    matesrates New Member

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  10. Cabinfever1977

    Cabinfever1977 New Member

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    Do not mod your muffler and make sure you keep a gasket on there, cops love to pull over loud stuff.
     
  11. matesrates

    matesrates New Member

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    Hi there
    Gapping a spark plug 0.25 inch =6.35mm can this do any damage to the engine????zpt
    My plug is gaped at 5mm all i can say wow never run sooooo good
     

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