1. Some members were not receiving emails sent from XJbikes.com. For example: "Forgot your password?" function to reset your password would not send email to some members. I believe this has been resolved now. Please use "Contact Us" form (see page footer link) if you still have email issues. SnoSheriff

    Hello Guest. You have limited privileges and you can't "SEARCH" the forums. Please "Log In" or "Sign Up" for additional functionality. Click HERE to proceed.

carb tuning question

Discussion in 'XJ Technical Chat' started by manufan, Sep 11, 2008.

  1. manufan

    manufan Member

    Messages:
    47
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    Brackney,Pa
    When tuning for filters and/or exhaust mods. To get richer you can either go smaller on the pilot air or larger on the fuel pilot or main fuel. Does it matter whether you change one or the other?
     
    manufan, Sep 11, 2008
    #1
  2. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,843
    Likes Received:
    66
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    Smaller on the Pilot Air will only serve to lessen the Amount of Pilot Fuek drawn-up by the Pilot Mixture Screw.

    The Air's rushing-over the connection in the Fuel Passage is what brings-up the Pilot Fuel from the Pilot Jet feed.

    If anything, Both AIR Jets should be larger and the Air Metering Ports of the Emulsion Tubes enlarged some to bring-up a larger volume of Fuel to compensate for the flood of Air with no airbox restriction.
     
    RickCoMatic, Sep 11, 2008
    #2
  3. manufan

    manufan Member

    Messages:
    47
    Likes Received:
    0
    Trophy Points:
    6
    Location:
    Brackney,Pa
    So on the Mikuni BS28, since the main air isn't replaceable and it already has a 170 pilot air, there isn't much to be done on the air side of things?
     
    manufan, Sep 11, 2008
    #3

Share This Page