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  1. #1

    High Revs at idle

    Now that the oil pump is in place (only 2 hours for installation of pump, priming of lines and installation of carbs), i restarted the engine. I am running premix while the oil pump is new. I realize I will run through plugs quickly, but that should save the engine.

    Anyways, now that I started the engine, it runs on high revs at idle. I shut off the fuel and ran all of the fuel out of the system. It starts easily, but continues at high revs. I didn't try to adjust the carbs yet. Maybe the former owner screwed with the adjustments.
    It is an SLT 750.
    Any ideas???


  2. #2
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    When the engine starves for fuel it revs really high. It's a good indication of an air leak. This is known as the dreaded "death rev" and should be avoided at all costs. Free revving an engine out of water can spell disaster. Turn the fuel back on and see if she comes down to a normal RPM.

  3. #3
    100 MILES OF HEAVEN AND I AM SMACK IN THE MIDDLE KEYZBUM's Avatar
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    WELCOME TO THE FORUM
    high revs or MAX SKI HIGH REVS??????????
    check the throttle cable for slack (should be the tinnyiest amount)(wow i spell gooooood)
    OH WAIT IS THIS IN THE WATER OR ON THE TRAILER
    revs on the trailer will be like 3k normal
    then in the water that relates to 1500 normal
    mattman

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    ph2ocraft's Avatar
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    Apply the choke and you can regulate the idle speed until the fuel lines fill and all the air is bled out of the system. Bed sure to put it on the water hose and don't run it too long.

  5. #5

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    spark plugs

    Tighten the Spark plugs, I know one time after I changed the plugs, my ski reved out of control, tightened the plugs and it was fine.

  6. #6
    Bernie's Avatar
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    Is it in the water or free revving?

  7. #7
    Right now it is sitting on a trailer. I am using the garden hose for water.

    I tried to use the choke to control the high revs and that did work for a short time. However, after controlling the revs at 3000 for a minute, the motor still wanted to run wild.

    What next???

  8. #8
    100 MILES OF HEAVEN AND I AM SMACK IN THE MIDDLE KEYZBUM's Avatar
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    Quote Originally Posted by tonkatiger View Post
    Right now it is sitting on a trailer. I am using the garden hose for water.

    I tried to use the choke to control the high revs and that did work for a short time. However, after controlling the revs at 3000 for a minute, the motor still wanted to run wild.

    What next???
    sounds like a lean condition
    you need to check if all the nuts on the base of the carbs are tight as well as the reed cage bolts
    then we need to look into the carbs
    mattman

  9. #9
    I have tightened the reeds and tightened the carbs. I did make sure that all of the gaskets were in place when I reinstalled the parts. I will check again. Is there a torque setting that I should use?

  10. #10
    This is interesting: I started the engine and the revs went high again. So I decided to remove the carbs and dig. I was tearing the engine apart and ran into an interesting issue:
    When I removed the return line from the carbs to the tank, it was under pressure. When I removed the gas cap, pressure was released and the pressure in the return line disapated.
    So I place a secondary hose on the return and into a canister. Then I tried to start the engine. The engine idled like a champ.

    Now the questions
    Where does the return line go to? I did release the pressure from the tank and the pressure in the line disapated.
    I tried to blow through the return line to the tank and was unable.
    Something seems odd. What am I missing????

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