5mm Thread Chaser or new Main Nozzles

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  • CUBuffs
    XStremely XSive
    • Nov 2005
    • 252
    • Castle Rock, Co

    #1

    5mm Thread Chaser or new Main Nozzles

    My '80 SG has a couple of main nozzles with damaged threads at the entrance so that my main jets can't grab onto them. I've been told that I need a thread chaser but I can't seem to find a 5mm size. Has anyone seen 5mm thread chasers, and if so where can I buy them?

    The other option is to replace the nozzles but I'm having trouble finding replacements. Any ideas?
    80 XS11 SG
    79 XS750 SF
    74 KZ400
    78 KZ650
    78 KZ750
  • BA80
    Doctor of XSology
    • Oct 2010
    • 9980
    • Tulsa, Ok

    #2
    You'll need to know the thread pitch........

    Get the best deals for 5mm Tap at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!
    Greg

    Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid.”

    ― Albert Einstein

    80 SG Ol' Okie;79 engine & carbs w/pods, 45 pilots, 140 mains, Custom Mac 4 into 2 exhaust, ACCT,XS850 final drive,110/90/19 front tire,TKat fork brace, XS750 140 MPH speedometer, Vetter IV fairing, aftermarket hard bags and trunk, LG high back seat, XJ rear shocks.

    The list changes.

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    • CUBuffs
      XStremely XSive
      • Nov 2005
      • 252
      • Castle Rock, Co

      #3
      That looks like a tap and I've been told that I need a thread chaser instead of a tap so I don't create new threads. It might be better to just buy the new main nozzles from Mikes XS. Has anyone used those?
      80 XS11 SG
      79 XS750 SF
      74 KZ400
      78 KZ650
      78 KZ750

      Comment

      • crazy steve
        XS-XJ Guru MODERATOR
        • Jan 2009
        • 7932
        • Beautiful outer Yelm, WA

        #4
        Originally posted by CUBuffs
        ...I've been told that I need a thread chaser instead of a tap so I don't create new threads...
        Either will work as long as it's the right size and you're not ham-handed when using it...
        Fast, Cheap, Reliable... Pick any two

        '78E original owner - resto project
        '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
        '82 XJ rebuild project
        '80SG restified, red SOLD
        '79F parts...
        '81H more parts...

        Other current bikes:
        '93 XL1200 Anniversary Sportster 85RWHP
        '86 XL883/1200 Chopper
        '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
        Cage: '13 Mustang GT/CS with a few 'custom' touches
        Yep, can't leave nuthin' alone...

        Comment

        • bikerphil
          Master of XSology
          • Jan 2008
          • 8631
          • South Flori-DUH

          #5
          Originally posted by CUBuffs
          It might be better to just buy the new main nozzles from Mikes XS. Has anyone used those?
          They are not the same, you're just asking for difficult tuning issues. If possible, fix what you have, I don't see anything wrong with using a tap instead of a thread chaser, JMHO.
          2H7 (79) owned since '89
          3H3 owned since '06

          "If it ain't broke, modify it"

          Comment

          • CUBuffs
            XStremely XSive
            • Nov 2005
            • 252
            • Castle Rock, Co

            #6
            Crazy Steve, you were right. I used a tap and it worked just fine. Thanks.
            80 XS11 SG
            79 XS750 SF
            74 KZ400
            78 KZ650
            78 KZ750

            Comment

            • clcorbin
              XStremely XSive
              • Jan 2010
              • 495
              • Albuquerque, NM

              #7
              Just FYI, a tap and a thread chaser operate differently even if they do have some outward similarities. In short:

              1) Tap - it CUTS new threads from a hole drilled to the minor thread diameter. Metal is removed.

              2) Chaser - it "chases" the deformed threads back into their original position. No or very little metal is removed and you end up with (hopefully) clean and strong threads.

              Obviously, you can't tap a hole with a chaser, but you CAN run a tap down a hole with deformed threads. The downside is you will be left with weaker threads because the tap came through and cut off most everything that was sticking out where it did not belong. The bolt/screw will also generally be looser after cleaning out a hole with a tap versus a chaser.

              And yes, knowing this I have "cleaned up" any number of holes with a tap instead of getting the proper chaser... As my dad would say (and has on MANY number of occasions): "Do as I SAY and not as I DO!"
              -- Clint
              1979 XS1100F - bought for $500 in 1989

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