Question about Polaris ATV

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Needle does move everthing else ok - Polaris ATV

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  • skillenb Nov 12, 2009

    Sorry for the misunderstanding it wasn't the carboratoter it was the needle on the speedometer that is not working.It is not giving you the miles per hour nor mileage.


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Hi and welcome to FixYa,

Initially, postback with the exact model number something like 2000 Magnum 325 4X4 if it were a Polaris ATV.

Offhand, the term 'needle' implies the main valve that allow fuel from the carb bowl to spray out towards the intake manifold. Depending on what carburetor it is attached to, it will either move by directly throttle cable pulling it or by a diaphragm activated by the vacuum developed in the intake manifold. Failure to move would then be either a faulty cable link/mechanism or poor or no vacuum.

Incidentally, the needle would also not move due to corrosion, the slider stuck, tear on the diaphragm, accelerator / throttle faulty, missing end stopper.

Good luck and thank you for asking FixYa.

Posted on Nov 12, 2009

  • Louie  Role
    Louie Role Nov 13, 2009

    Appreciate your postback and clarifying information.

    Speedometer faults would be largely dependent on what type as installed to what model.

    If it were mechanically driven speedometer, possibilities are:

    • sender gear (least likely);

    • speedometer itself (likely); or

    • speedometer cable (most likely).

    If it were an electronic/electrical type, then possibilities are:

    • sender unit (least likely);

    • cable / wiring / connector (likely); or

    • speedometer board (electronics) (most likely).


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