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  1. #1

    Default Need help troubleshooting

    The changes I made
    1. 45/170 jets (from 42/170)
    2. 1x Needle shim
    3. Cut into the air box to add air flow (picture attached)
    4. K&N air filter

    1. When I drop the throttle the bike will stay high rpms for no reason? After 10-15 seconds it will idle down. The return spring is good and there is nothing interfering with the throttle cables
    2. The idle air screw is turned out 4-5ish turns before it kills the popcorn on deceleration. (I assume with the air box mod and K&n I should used the 46 jet?) but now itís not stopping it at all.
    Last edited by 2007blastAK; 05-18-2020 at 03:38 AM.

  2. #2
    Racer styxnpicks's Avatar
    Join Date
    Jan 2012
    Cincinnati, OH


    classic symptoms of a vacuum leak. hanging rpms means too lean. likely a torn carb boot. start there.
    Buell XBlast: NRHS Xb Stage 2 lite, 515 10.5:1, .551 cam, Daytona Twin 1005s-Ex, Vance Hines, Crossroads Fork Brace + Rearsets. Pirelli Rubber
    Buell XB9r: Race ECM/Muffler. K&N

  3. #3
    The Boss
    Jet-Lee's Avatar
    Join Date
    Mar 2012
    Oakley, CA


    A vac leak will also cause the popping on decel and no amount of turning out the pilot will stop that.
    "It is impossible, until some crazy son of a bitch has the audacity to believe that no matter what the expert says, I can still do that shit." - C.T. Fletcher

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