Do you need to rejet with SBK pipe?

Discussion in 'Performance Mods' started by clawbrant, Oct 24, 2009.

  1. clawbrant

    clawbrant New Member

    I was thinking about getting an expansion chamber for my skyhawk from Sick Bike Parts and I was wondering if I would need to rejet the carb. If so what size jets would I need?

  2. retromike3

    retromike3 Member


    Got my pipe and found My mixture got better. Went form oily black to gray on my spark plug. I think that your mixture should be the same its just that the quantity has increased. like a supercharger you are effectively increasing the size of the combustion chamber, More air gas same ratio as before.

    I may be wrong, But I think I'm right.

    Mike- old fat and faster with assist
  3. Ghost0

    Ghost0 Guest

    Every engine and situation is different. Jetting depends on a lot of things, pipe, carb, fuel/oil ratio, altitude, porting, plug etc. Most of our customers don't need to rejet or if they do adjusting just the needle will get them close enough.
  4. motorpsycho

    motorpsycho Active Member

    I had to move my jet needle clip one notch down from the center notch (to richen it slightly). I'm getting a nice tan color on my plug now. With the stock exhaust and the jet needle clip set on the center notch, my plug was always black.