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  1. #1

    sl750 not running at full rpm

    I have a 1994 Polaris sl750 and when i first start it up and taking out for a spin then max rpm's i cant get out of it is 4500-4600. It will be like that for about 5-7 min and then it starts to gradually increase to full rpms. Could this be the on board computer that is causing the problem. It runs fine while it is at 4500 rpm it just seems like there is a rpm limiter on and then the limiter goes off after a few min. Thanks


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Possibly the ignition system, but more likely a fuel system problem.

    What has been done to the fuel system recently?
    Carbs rebuilt?
    Original fuel lines?

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    After you've ran it in "limited RPM" mode for a few minutes, check the spark plugs.

    Then after it's cleared itself out, check them again and see if there's a difference between them.

    I'm willing to bet the thing is saturated with fuel, and once it warms up and uses all the excess fuel, it runs normally. Try it out and let us know.

  4. #4
    Thanks going there today I will let you know. I know the guy i bought it from did a lot of work on it to make it faster. I think the fuel pump is the 3 line one bc i see there lines coming from it. But i am not sure if it is the original line. Is there any way if i can tell if it is the org lines. Thanks

  5. #5
    In the last post i meant 3 line not there sorry. And i am pretty sure the carbs have been rebuilt. Hid did a lot of work to it so i am sure he did that. Thanks

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by jbwoodshop19509 View Post
    In the last post i meant 3 line not there sorry. And i am pretty sure the carbs have been rebuilt.

    He did a lot of work to it so i am sure he did that. Thanks
    You can edit your own posts. Just click the Edit button in the lower right corner

    The three outlet fuel pump has five hoses;
    three to the carbs
    Fuel inlet from tank
    Pulse line from crank case

    Don't assume anything has been done, or done correctly. Best to check and confirm yourself.

    Fuel lines replaced?
    Fuel selector valve cleaned, rebuilt, or replaced?

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