'04 Kymco Super 9 loses power...

Discussion in 'Battle Scooters' started by BonneRocker, May 22, 2006.

  1. BonneRocker

    BonneRocker Been here awhile

    Joined:
    Jul 25, 2003
    Oddometer:
    241
    Location:
    Austin, Texas
    So my Kymco loses power under load.
    After warming up and trying to speed up, it bogs down to 10 mph and eventually dies, if held at wide open throttle.
    I hear a reed-like sounding rattle/ sucking noise maybe. Checked air filter.
    It does fine if I never want to go over 20 mph. Seems to shift fine at first but when going full throttle, bogs down. I can back off the throttle and limp it back home going slowly.
    I have duplicated the problem over and over.
    I seems ok at first, starts right up. Good gas, good spark, no other electrical gremlins.
    It will rev strongly on the centerstand up to what sounds like WFO.

    It seems transmission related.
    I would appreciate any input? :ear Thanks.
    #1
  2. kdude

    kdude orgasmatron engineer

    Joined:
    Feb 19, 2004
    Oddometer:
    2,022
    Location:
    Montreal, Canada, Cancun Mexico
    Sorry i can't help you but i'm curious cause that is a bike im test riding this week.

    I hope you fiigure it out.
    #2
  3. ysr612

    ysr612 Long timer

    Joined:
    Aug 7, 2003
    Oddometer:
    10,098
    Location:
    Beaumont, texas
    things like that are almost always an air leak after the carb
    #3
  4. BonneRocker

    BonneRocker Been here awhile

    Joined:
    Jul 25, 2003
    Oddometer:
    241
    Location:
    Austin, Texas
    Would an air leak affect the low speed throttle also?
    It has plenty of go at low speed but as soon as I open throttle fully, it slowly bogs down until it dies (if held open).
    I can do on-off with the throttle and keep moving, but not over 10-12mph, maybe 15.
    #4
  5. ysr612

    ysr612 Long timer

    Joined:
    Aug 7, 2003
    Oddometer:
    10,098
    Location:
    Beaumont, texas
    if it has just a flap that open up (in short a torn place it the boot between the carb and the head) the other thing to check is amout of fuel it is getting if the float is low or it fuel starved. if you pull the fuel line and it runs out slowly it will do this.
    #5
  6. BonneRocker

    BonneRocker Been here awhile

    Joined:
    Jul 25, 2003
    Oddometer:
    241
    Location:
    Austin, Texas
    I'm gonna drain float bowl, check diaphragm for leaks, check for clogged main jet, pull fuel line.
    I'll report what happens.
    Thanks a bunch.
    #6