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.

Drilling Out Carb Jets

Discussion in 'Hangout Lounge' started by ginger_ninja, Dec 27, 2009.

  1. ginger_ninja

    ginger_ninja New Member

    Messages:
    29
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    South-West England
    This may sound like a daft idea, but i'm thinking of increasing the size via drilling.

    Two reasons;-
    1. Everywhere is on christmas shut-down here & I want to 'have-a-go' whilst i'm not using the bike for work.
    2. £££! I know jets aren't big bucks, but if i can save a penny, i will!

    Does anyone know the relevance of the numbering of the jets?
    i.e. does 100 = 1mm
    does 120 = 1.2mm
    does 130 = 1.3mm etc

    I currently have 40 pilots and 100 mains.

    any info will be appreciated.
     
    ginger_ninja, Dec 27, 2009
    #1
  2. RickCoMatic

    RickCoMatic Well-Known Member

    Messages:
    13,842
    Likes Received:
    67
    Trophy Points:
    48
    Location:
    Massachusetts, Billerica
    I wouldn't get-out the Number Drills and enlarge the Original Jets unless I had a "Spare" or "Back-up" set of the "Correct" Jets that have not been altered.

    This INDEX is a Cross-Reference for MotorCycle Jet Sizes as they Cross-Ref to:

    Numbered Drills <>Lettered Drills <> Fractional Drills:
    (Drill SIZE / Decimal INCH / Metric MM / Size JET)
    [​IMG]

    1.10mm - 0.043 - 1.100 - 110.0
    1.12mm - 0.044 - 1.120 - 112.0
     
    RickCoMatic, Dec 27, 2009
    #2
  3. albran

    albran Member

    Messages:
    180
    Likes Received:
    0
    Trophy Points:
    16
    Location:
    DFW, USA
    The hardest part will be getting the correct size bit.

    ab
     
    albran, Dec 28, 2009
    #3
  4. Zookie400

    Zookie400 Active Member

    Messages:
    1,046
    Likes Received:
    3
    Trophy Points:
    38
    Location:
    Connecticut
    i use my carb drills often, take your time and keep the bit straight.

    worst case is you need to buy the proper sizes should you screw up. no biggie.
     
    Zookie400, Dec 28, 2009
    #4
  5. ginger_ninja

    ginger_ninja New Member

    Messages:
    29
    Likes Received:
    0
    Trophy Points:
    1
    Location:
    South-West England
    Due to the christmas shutdown for shops here, I figured i'll give it a go! after all, if you've seen my other posts, it couldn't run any worse!!

    I was advised for 128 mains, so i got a 1.2mm drill and did what i needed to! (figuring the drill will almost certainly cut oversize).

    Still have a kitchen full of carb parts (+ motorcycle!!!!) so won't know whether it worked for a day or two.
    The other 'mod' I was considering was shimming up the needle by 1or2mm.
    Anyone able to advise on whetherthis will be required?

    thanks guys!
     
    ginger_ninja, Dec 29, 2009
    #5

Share This Page