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Thread: Engine RPM not coming down after acceleration

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    Addicted swift's Avatar
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    Unhappy Engine RPM not coming down after acceleration

    I own a 8 years old TVS Victor GLX.

    There is a problem with my bike. After accelerating the engine RPM just stays up, like holding the accelerator. It never comes down or it becomes normal after sometime. This problem is there only during rainy season or during night (if its cold outside)

    First i guessed (my mechanic too) it as a problem with throttle cable and i replaced it but, the problem still persists. My mechanic says he had checked the carb and there is no issue with it. Now he is suggesting me to change the CDI unit (which will cost 1000+, as said by him).

    But before changing CDI unit i need suggestion from people here. Should i go for CDI unit change, i dont mind spending 1000+ if i'm getting peace of mind or is there anything i can do to solve this issue.

    Please help me to find a solution.
    Honda Activa (2011)
    TVS Apache RTR 180 (2013)
    TVS Victor GLX(2004-2013)

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    review your cable related all surrondings are fine n good. twist your throttle grip a bit more towards low rpm. turn your handlebar left n right. In your carb, make sure throttle cable returns to default state.

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    You need to check the cable i guess..

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    Rusted Abhijeet Bhattacharjee's Avatar
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    Quote Originally Posted by swift View Post
    I own a 8 years old TVS Victor GLX.

    There is a problem with my bike. After accelerating the engine RPM just stays up, like holding the accelerator. It never comes down or it becomes normal after sometime. This problem is there only during rainy season or during night (if its cold outside)

    First i guessed (my mechanic too) it as a problem with throttle cable and i replaced it but, the problem still persists. My mechanic says he had checked the carb and there is no issue with it. Now he is suggesting me to change the CDI unit (which will cost 1000+, as said by him).

    But before changing CDI unit i need suggestion from people here. Should i go for CDI unit change, i dont mind spending 1000+ if i'm getting peace of mind or is there anything i can do to solve this issue.

    Please help me to find a solution.
    Revs not coming down may indicate a lean mixture, make sure that's not the case.
    Also check if the throttle return spring on your carb is ok.
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    @ swift,
    sticky throttle plate (also called butterfly) and/or slide can also be the cause. Check that too.

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    clutch gone
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    Quote Originally Posted by swift View Post
    I own a 8 years old TVS Victor GLX.

    There is a problem with my bike. After accelerating the engine RPM just stays up, like holding the accelerator. It never comes down or it becomes normal after sometime. This problem is there only during rainy season or during night (if its cold outside)

    First i guessed (my mechanic too) it as a problem with throttle cable and i replaced it but, the problem still persists. My mechanic says he had checked the carb and there is no issue with it. Now he is suggesting me to change the CDI unit (which will cost 1000+, as said by him).

    But before changing CDI unit i need suggestion from people here. Should i go for CDI unit change, i dont mind spending 1000+ if i'm getting peace of mind or is there anything i can do to solve this issue.

    Please help me to find a solution.
    You can only have two problems and nothing to do with the CDI or the clutch:

    1. Your fuel mixture is too lean as someone mentioned, get your carb cleaned thoroughly.

    2. Your throttle cable or slide is getting stuck. From the pictures I could google, it looks like the GLX has a cable operated round slide carb & not a diaphragm one.

    The slide on my Supra carb used to get stuck a lot in the rains as the water used to trickle down on the throttle cable to the top of the carb and then into the slide causing it to stick.

    A good test would be when it happens next time, give sharp taps on the carb body (the top cylindrical part) if the revs decrease immediately, then its the slide or the cable else its your fuel mixture or a leaking inlet rubber.

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    Quote Originally Posted by Gyroerror View Post
    You can only have two problems and nothing to do with the CDI or the clutch:

    1. Your fuel mixture is too lean as someone mentioned, get your carb cleaned thoroughly.

    2. Your throttle cable or slide is getting stuck. From the pictures I could google, it looks like the GLX has a cable operated round slide carb & not a diaphragm one.

    The slide on my Supra carb used to get stuck a lot in the rains as the water used to trickle down on the throttle cable to the top of the carb and then into the slide causing it to stick.

    A good test would be when it happens next time, give sharp taps on the carb body (the top cylindrical part) if the revs decrease immediately, then its the slide or the cable else its your fuel mixture or a leaking inlet rubber.
    get a stronger spring to close the slide.
    My friend's bike had the same problem. He had to put 2 springs to give enough force to close the slide/throttle. Problem fixed.

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    Quote Originally Posted by Mad Mik View Post
    get a stronger spring to close the slide.
    My friend's bike had the same problem. He had to put 2 springs to give enough force to close the slide/throttle. Problem fixed.
    nice juggad idea!!
    Just be sure that slide's able to open fully with full rotation of accelerator.

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