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  1. #1

    Pilot Adjusting Screw needle thread damaged, need size/pitch of tap/die to fix thread

    I'm rebuilding the carbs on a 2000 GP800. I tried to remove the adjustment screw/needle like the walk through showed and it was very difficult to remove, I couldn't get it with a screwdriver, it was deforming, so I used pliers and eventually vise-grips to get it out, and the threads are damaged.

    Does anyone know the size/pitch of the threads so I can tap the carb before putting in a new needle?

    Screw, Pilot Adjusting Part# 66E-14211-00-00

    #32 on this diagram

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    Thanks
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    silver93t's Avatar
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    you have a thread pitch gauge? worst case home depot usually has one in the bolt section

  3. #3
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by biaachmonkie View Post
    I'm rebuilding the carbs on a 2000 GP800. I tried to remove the adjustment screw/needle like the walk through showed and it was very difficult to remove, I couldn't get it with a screwdriver, it was deforming, so I used pliers and eventually vise-grips to get it out, and the threads are damaged.

    Does anyone know the size/pitch of the threads so I can tap the carb before putting in a new needle?

    Screw, Pilot Adjusting Part# 66E-14211-00-00

    #32 on this diagram

    Click image for larger version. 

Name:	Untitled.png 
Views:	104 
Size:	105.1 KB 
ID:	309497


    Thanks
    sounds like you will need a new carb i have one a set for a 66v ,1200r engine. you can use the body and swap all the internals.

  4. #4
    Quote Originally Posted by mikegp View Post

    sounds like you will need a new carb i have one a set for a 66v ,1200r engine. you can use the body and swap all the internals.
    If I read that right, you have a set, 3 carbs in total? I think I have the same issue with the second carb as well. WOuld you be willing to part with just the 2? Either way what price would you be asking?

    I've attached pictures of the threads in card and the screw/needle, while I have little experience with this type of problem the carb threads look to have minor damage that could be fixed if I could only find the right tap for it. I've ordered new needles, and if I can't repair it I may end up wanting to but yours. Thanks.

    Click image for larger version. 

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  5. #5
    I think the problem will be; you wont be able to get a tap deep enough to smooth out those threads. The tap will bottom out before it has a good chance. You might want to look at a Helicoil kit for this as Helicoil makes thread tap bits with a very steep cut, plus the helicoil insert will make the threads like-new. I'd be very hesitant about this type of repair, but its all about your situation. I know Carbs can be pretty expensive.

    O-Reilys auto parts sells Helicoil kits if you want to take a look however I really doubt they will have the super-fine thread pitch you are looking for.

  6. #6
    powerstroke specialist mikegp's Avatar
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    I can send you all three if you like for the price of one . I had enough of carburetor long time ago, and they are just in my way every time. let me know. keep in mind you will need to swap everything from yours into mines . I already remove needles ,but it will be hard for me to find them.
    throw a number , keep in mind shipping .

  7. #7
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by biaachmonkie View Post
    Quote Originally Posted by mikegp View Post

    sounds like you will need a new carb i have one a set for a 66v ,1200r engine. you can use the body and swap all the internals.
    If I read that right, you have a set, 3 carbs in total? I think I have the same issue with the second carb as well. WOuld you be willing to part with just the 2? Either way what price would you be asking?

    I've attached pictures of the threads in card and the screw/needle, while I have little experience with this type of problem the carb threads look to have minor damage that could be fixed if I could only find the right tap for it. I've ordered new needles, and if I can't repair it I may end up wanting to but yours. Thanks.

    Click image for larger version. 

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ID:	309646Click image for larger version. 

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    what I can see on that picture , you are not going to be able to fix it . don't waste you money on expensive heli kits .

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