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Air Fuel Mixture Screws

The Original Sin Jan 7, 2018

  1. The Original Sin

    The Original Sin Active Member

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    I run one of my ZL1 with pods. I'm having a really hard time adjusting the fuel to air mixture on my carbureators. The common screws as you know are very hard to reach making them a real ***** to fine tune. Has anyone installed the big finger turn type screws? Can anyone tell me which screws to use and any comments on your experience with them.
     
  2. R. J.

    R. J. Senior Member

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    :hello: So how come no one responded to this question. :pain10:. :banghead:. They are more than just screws. They are like a jet but solid with no holes. They consist of an O-ring, spring & a flat washer. I know that they make a set up for motocross bikes that is called adjust on the fly but I've never seen one for mutli-carberated street bikes.
     
    Last edited: Jan 9, 2018
  3. prfixer

    prfixer Senior Member Supporting Member

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    You most likely need to rejet the carbs first.
     
  4. 87kawzl

    87kawzl Well-Known Member

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    Did you look at any tools available to reach the screws? 90° driver? Can you use one of the ratcheting wrenches with some tape over the end and a bit that is hex on one end and screw driver on the other. It's one of those things you rarely need to mess with so I would try to figure out how to get to them. Take a hacksaw to a driver and use pliers
     
  5. The Original Sin

    The Original Sin Active Member

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    I was wondering if anyone used those long shaft (hand adjustable) screw type. The reason I ask is because I'm having air to fuel mixture issues with my carbs.
     
  6. dommie67

    dommie67 Active Member

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    Those only adjust the idle circuit mixture. You need to re-jet for pods as prfixer posted above.
     
  7. The Original Sin

    The Original Sin Active Member

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    Got it! Thanks.
     
  8. kawboy

    kawboy Supporting Member Technical Author

  9. The Original Sin

    The Original Sin Active Member

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    That's it! Do you use them yourself or have you heard any feedback on using them?
     
  10. kawboy

    kawboy Supporting Member Technical Author

    No, I haven't used them.
     
  11. 87kawzl

    87kawzl Well-Known Member

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    Nice find Kawboy, if ya buy them post up a review Original. Still need to get in there to remove the screws. Once you have that figured out you have the tool needed to fiddle with the mixture on occasion. $65 seems like alot for something to fine tune once a year, maybe I'm just cheap.
     
  12. The Original Sin

    The Original Sin Active Member

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    Yeah, wheeew! I agree.
     
  13. WillyD

    WillyD Senior Member

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    This works perfect. What I use for my 1000 with pods. Put a straight bit in the end.



    image.jpeg
     
    R. J. likes this.
  14. R. J.

    R. J. Senior Member

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    :hello: I have 2 of those. One is made by DeWalt CHINA which is to fat to use & the other is made by Milwaukee USA. The Milwaukee one was my Dad's which is very old. Some of my bits are to short & others to long. I shortened some longer bits to get up to the carbs mixture screws. IMG_5383.JPG
     
  15. R. J.

    R. J. Senior Member

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    :hello: I bought 2 sets of the thumb fuel air mixture screws from E-bay. The O-rings & washers that come with the kits are to big. I had new OEM ones so I used them. I sent the seller a message telling him that the O-rings & washers was incorrect but he did not get back to me. I'm going to try them in the 250 Eliminator carbs. Also I marked the thumb knob using a 3 sided file. This way you can tell how many turns that you went. 21056-ce4c51cf241dc9e9b7e4d9894ad183a5.jpg 21057-65daeb59bf53ce89784721d3eb42ec08.jpg 21058-d5c48e0739629e092ca1e547400b5471.jpg 21059-99c922efd3a69267aef77ea3d33380d1.jpg 21060-a3c3b459c6f2cc9629de74c8f7543197.jpg 21061-6e4a3d5ace3ef6137cc4fe75fde65511.jpg
     

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