Question about 1995 Suzuki LS 650 Savage

4 Answers

Carb Problem 1995 Suzuki LS650 Savage

Bike wouldn't start.
Removed carb (Mikuni) - pilot jet clogged and dirt inside.
Disassembled and & cleaned.
Replaced pilot jet, main jet, all gaskets, bowl needle valve, air filter, fuel **** (leaking), adjusted float level per shop manual.
Bike ran perfect for about two weeks.

Now it will only idle. If I apply throttle it will stall. If I release the throttle quickly it will recover to idle. Idle is smooth.

Concluded that because it idles the pilot circuit is ok.
Suspected mid range circuit which consists of the needle jet and the slide assembly is defective (slide is jammed).
Removed carb today.
Fuel in bowl ok, float level ok, main jet clean, needle jet clean, slide assembly moves freely.
Checked but can't find anything wrong with it. Don't want to reinstall it until I can find something wrong.

Posted by on

  • Frank LaBarbera Nov 16, 2008

    Checked the rubber intake tube when I first removed the carb and again just now. The rubber is pliable with no cracks or other defects. The intake manifold and the valve stems look good.

    The carb was correctly seated per the Cymer shop manual when I first installed it after the initial repair.

    I have worked on cars since I was 12 (55 years) and have rebuilt a lot of engines, transmissins, and carbs including quadrajets but not much with motorcycles; an engine is an engine.

    I am helping a neighbor with his cycle. He can't afford to take it to a repair shop.

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Have you checked to make sure there is no air lock in the fuel injection system? also check the spark plug and HT lead that connects to it

Posted on Nov 16, 2008

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You still have a dirt particle issue, the jets are so tiny it takes very little to cause a hess like you have, I had more than one Suzuki bikes, and had this very problem many times over the course of 4 different models and 30 years, also drain and flush your fuel tank, use denatured alchol, it will blend with gas if a little is left in the tank, it also absorbs water, I suspect you got some dirty fuel, change where you get gas, if you are careful you can reuse the old carb gaskets over, never bought a kit for any of mine. One last note make sure the rubber diaphragm for the throttle slider is ok and the slider is free when you push it up and let it drop back down, the throttle should return to the closed position slowly and smoothly.

Posted on Nov 16, 2008

  • yadayada
    yadayada Nov 16, 2008

    My suggestion is based on sound experience, and I think it is the problem.

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It can be a circuiot problem let me check if i can give u some exact point to check

Posted on Nov 16, 2008

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  • Master
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Hi,

Initially, have you checked the rubber intake manifold, with special attention to the lip that closes over the carbs. Please check if the rubber is still pliable or is it hard and cracked. In some extreme instances, there could be already cracks on the tube wall itself.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Posted on Nov 16, 2008

  • Louie  Role
    Louie Role Nov 16, 2008

    Appreciate the quick reply. My thinking is on idle air/fuel mix just right, however, soon as you open the throttle, the vacuum increases and any leaks after the carb would be a potential source of too much plain air entering the engine. So it will be either the rubber tube or a vacuum leak somewhere.

    Incidentally, another expert, emissionwiz, has provided a solution that could perhaps address your issue more.

    Cheers.


  • Louie  Role
    Louie Role Nov 17, 2008

    Just a thought, 2 actually:


    • if you have re-installed back the carb and problem persist, try spraying starter fluid or carb/injector cleaner anywhere on the carb and/or the rubber tube; if there is a leak, the idle RPM would go up;

    • absence of or a torn or clogged air-cleaner/filter would also affect throttle response of the engine.


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