Ness Big Sucker install on Sportster

Discussion in 'Engine, Fuel and Exhaust' started by christopherchubby, Feb 18, 2009.

  1. I am going to install an Arlen Ness stage 1 big sucker on my 2001 sportster. I currently have the screaming eagle stage 1 kit. Last year i had the 1200 kit installed and it was rejetted, will i need to rejet again or install and ride it and see?
  2. glider

    glider Veteran Member

    You'll probably be OK with that change. Here's a way to check it out.

    Run the bike through the gears into third gear and run third up to 60-70 MPH full throttle, then chop the throttle about 1/8 to 1/4 back and see if the bike either surges ahead or stumbles then recovers.

    If it surges ahead, your jetting is lean
    If it stumbles and recovers , your jetting is rich
    If it makes no difference, you're pretty close.