my bike doesn't accelerate more than 55mph - need advice what could be wrong here!

Discussion in 'Motorbike Technical Discussion' started by just4email, Jul 11, 2006.

  1. just4email

    just4email Guest

    Hi Guys

    I'm new to this group. So please bear with me.
    When I rode my Kawasaki ninja 500R today, it wouldn't let me go more
    than 55mph no matter how much I accelerate. I usually ride upto 75mph
    on this but today it was behaving weird. Please advise what could be
    wrong. I will be taking it down to the mechanic tomorrow but I wanted
    to save a few bucks if I could....

    just4email, Jul 11, 2006
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  2. Your mother turned on the governer when you wern't looking.

    Ted Mittelstaedt, Jul 11, 2006
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  3. The left-handed thrunge sprocket is interfering with the 55mph mark on
    the speedo dial and throwing the backlash regulator into reverse.

    Change up a gear.
    The Older Gentleman, Jul 11, 2006
  4. just4email

    FB Guest

    How old are the spark plugs? After about 8,000 to 10,000 miles, they
    should be changed. The center electrode erodes to a rounded shape and
    the spark plug needs more voltage to fire. It should cost you about
    $5.00 or $6.00 for two new spark plugs, unless you can get a good deal
    on the right parts from an automotive parts store.

    I stay away from the motorcycle $tealer$hip$ if I can get parts any
    other place.

    If you are in a financial bind, you can use a thin file to make the
    center electrode flat again and you can re-gap the spark plug, but it
    won't work as well as a brand new spark plug.

    Also, the idle mixture circuits in your carburetors might be getting
    plugged up with gum and varnish. I recommend putting about 4 ounces of
    Berryman's B-12 Chemtool Choke and Carburetor Cleaner into a full tank
    of gas about twice a year to clean the carburetors out.

    If you live in a country where gasoline is called "petrol", look for a
    carburetor cleaner that contains xylene, acetone, toluene, and methyl
    alcohol. Fuel system cleaners intended for fuel injection systems don't
    work as well, you want a cleaner designed for carburetors.

    There is also the possiblity that your air cleaner element is really
    dirty and is restricting air flow.
    FB, Jul 11, 2006
  5. just4email

    abesimpson Guest

    Hello just4:
    If the engine is not running rough, missing, or backfiring, and runs
    smoothly to 55, then I would suspect too much back pressure in the
    exhaust system. Did you pack your own mufflers?
    abesimpson, Jul 11, 2006

  6. FFS.
    The Older Gentleman, Jul 11, 2006
  7. You might want to make sure the choke's really off.
    Rob Kleinschmidt, Jul 11, 2006
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