Results 1 to 3 of 3

Thread:

  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

    Problems.
    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
    Location
    Cincinnati, OH
    Posts
    435

    Default

    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
    (Admin)
    Jet-Lee's Avatar
    Join Date
    Mar 2012
    Location
    Oakley, CA
    Posts
    6,813

    Default

    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

    Click here to enlarge
    Left to Right:
    2003 Blast (Blue), 2001 XBlast (Rex), 2007 XB9R Firebolt (Bolt)

    Do you like the forum? Do you appreciate the input and community support? Consider donating to help keep us alive and growing! Click here to donate!
    Like us on Facebook!

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •