Thumbscrew for pilot
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  1. #1
    Senior Member biglefti's Avatar
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    Have any of you found a supplier for a pilot circut thumbscrew for the 2003 carb? I tried a search, but didn't find much so figured I would just ask in here. TIA

  2. #2
    Senior Member old white truck's Avatar
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    If you are talking about the Throttle Stop Screw (with the short cable that runs to the other side of the carb) it is part number 5LB-14321-00-00 and it can be ordered from Stadium Yamaha (or most other Yamaha dealers).



    You may be talking about a different part, in that case, just ignore everything I just said.

  3. #3
    Senior Member biglefti's Avatar
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    Quote Originally Posted by Old White Truck View Post
    If you are talking about the Throttle Stop Screw (with the short cable that runs to the other side of the carb) it is part number 5LB-14321-00-00 and it can be ordered from Stadium Yamaha (or most other Yamaha dealers).



    You may be talking about a different part, in that case, just ignore everything I just said




    Actually, I'm looking for a thumbscrew to adjust the pilot (idle) mixture on my 03. I once bought a after market one for my old DR650. I liked it but haven't had any success finding one for the TW. Thanks for trying!

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  5. #4
    Senior Member IzakGt's Avatar
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    No real help but I saw a similar one at Thunder products I don't think they will fit the Mikuni 28mm carb.

    http://www.thunderproducts.com/easytune.htm

    Not familiar with 03 carb, maybe they could help?

  6. #5
    Senior Member frog13's Avatar
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    Just a long shot,but if you check some of the Japaneese sites(hopefully there is an English conversion?)you may find something for the Teikei carb.

  7. #6
    Senior Member Point37's Avatar
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    this would be a great product!...i would buy one in a heartbeat

  8. #7
    Senior Member Skyking's Avatar
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    These look like they might work; but I'm not sure.

    http://www.ziptyracing.com/fuel-screws/





    Ride on Daddy-O

  9. #8
    Senior Member Gerry's Avatar
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    Boy Kwizard those look to show promise. I have a bit of time today, and since it appears the rain has stopped at least for awhile. What I had been thinking of is slipping a section of small diameter metal tubing over the end of the adjustment jet and affixing it with epoxy. Hardware stores and hobby shops have a variety of such tubes. I'll give it a try and let you folks see what I can put together. Well luckily the rain held off so I was able to roll the bike out and work in the Sun. Not rocket science, but in the back of my mind I was sure hoping I could purchase a replacement if this project did not work. As the threaded part of the jet goes all the way to the end and includes the screw driver slot, I had to turn it down to the i.d. of the tube. As well, the hole that the jet screws into is no larger than the o.d. of the jet, so the o.d. of the tube I used could not be any larger than the diameter of the threaded section of the jet. Seems all went well. Tube is pinned and epoxied to the jet and lateral force on that joint when turning will be minimized by the fact that the tube is 'in' and supported laterally by the jet hole. I will let the epoxy cure for a day and set about readjusting. BOY the placement of that jet makes adjustment VERY awkward. Gerry







    The jet is installed and adjusted. Here is a view from the exhaust side. Because of my shroud, I can't access from this side without getting burnt. On the other side, the cam tensioner prevents a 'slam dunk' adjustment, but still far, far easier than what I had to go through before. The view from the left is marginal, but the material on the jet extension is braided fuel injection hose. It provides a nice gripping surface, does not absorb heat form the engine, and allows some flexibility as to minimize lateral stress on the extension. Time as always, will tell, but I don't foresee any problems.









    Take care my Friend.........

  10. #9
    Senior Member Point37's Avatar
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    great idea!

  11. #10
    Senior Member williamemack's Avatar
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    You can go on Amazon .com and they have carb adjusting screwdrivers that have a 90 degree stub bend at the end just for adjusting jets like ours. I ended up with the modified needle found in our classifieds. Works very well.

    Will

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