Idle speed adjust....very stiff.
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Thread: Idle speed adjust....very stiff.

  1. #1
    Senior Member Trail Woman's Avatar
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    Idle speed adjust....very stiff.

    Does anyone have a fix or suggestion for this stupid idle adjustment? The fact that it loops around to the other side seems like a pointless aggravation and I'm considering cutting it off and modding it to the one side..Any suggestions? Reasons not to alter it?

  2. #2
    Senior Member Fred's Avatar
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    Yamaha's flex cable is exceedingly stiff for the application, could have been made out of smaller cable. When I adjust mine I open throttle a bit to lessen force on adjuster as I turn it. A few drops of oil along length of cable seems to also help.
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    Senior Member RockyTFS's Avatar
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    Both of mine turned easily with two fingers. I think you need to lube it like Fred said. Could it also be corroded?
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    Senior Member jb882's Avatar
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    What Fred said about opening the throttle a little... I also find a little dab of anti seize paste on the threads where the cable threads into the carb helps a lot. I would remove the cable, clean the threads of any corrosion and smear some anti seize on the threads of the cable before you screw it back in.

    The only reason i can see not to modify it is the location of the exhaust. You could burn your hand or arm on it while trying to adjust it if you removed the cable and put a regular adjuster in its place.
    Last edited by jb882; 03-20-2018 at 01:16 PM.
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    Senior Member Trail Woman's Avatar
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    It's only 3 years old stored in a dry building so I doubt it's very corroded. I tried some lube and it only turns a hair back and forth...might need too some time to do it's thing.
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    Senior Member jb882's Avatar
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    You don't need moisture for galvanic corrosion to happen, just two dissimilar metals which is what that screw and carb are. Moisture just makes it worse.....

    I bought a brand new carb a few years back that already had corrosion on it right out of the box, the screw was stiff and needed a lot of persuasion to come out, it happens.
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    Senior Member Badgerflorida's Avatar
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    +1 Fred. Slight twist of the throttle will make it turn much easier.
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  9. #8
    Senior Member RockyTFS's Avatar
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    Quote Originally Posted by Trail Woman View Post
    ... I tried some lube and it only turns a hair back and forth...might need too some time to do it's thing.
    What kind of lube? Liquid Wrench? PB Blaster? Something is not right here, that knob should be easy to turn. You may have to remove it and see if it is real stiff when not connected.
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