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Thread: Tachometers

  1. #1
    Canadian Beaver Inspector jkindt's Avatar
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    Tachometers

    Is there a round analog tachometer available that would work on my '94 SL650 project? It doesn't have an MFD and I have no way to check the RPMs once I get it running. I am hoping to match with the round fuel gauge. Any ideas?


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    mr. happyfunbear tenjuna's Avatar
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    you could make something up...get a round gauge from a 750 and mount a tiny tac in it or something.

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    Click avatar for tech links/info, donation request K447's Avatar
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    If you can find a round style Polaris MFD display (aka Type 1), it can be wired up without too much trouble.

    I think Polaris did sell an analog style tachometer for a few years.

    If you just want to use it short term, you can use a Tiny Tach or PET tach

    Multi-Function Display (MFD)

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    Canadian Beaver Inspector jkindt's Avatar
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    Quote Originally Posted by K447 View Post
    If you can find a round style Polaris MFD display (aka Type 1), it can be wired up without too much trouble.
    Do I need other parts? Is there a wiring diagram?

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by jkindt View Post
    Do I need other parts?

    Is there a wiring diagram?
    Other than the MFD itself, there is a simple metal U-bracket on the back that holds it in place.

    An 8-pin Deutsch connector, some wire, crimp end connections, and we can tell you where each wire connects.

    Polaris I think even sold a kit with the round MFD and the wiring pieces, but really once you have the MFD, the rest isn't that hard to put together.

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    Canadian Beaver Inspector jkindt's Avatar
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    Would the round MFD replace my existing fuel gauge? That would be nice because then it would keep the factory look.

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    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by jkindt View Post
    Would the round MFD replace my existing fuel gauge?

    That would be nice because then it would keep the factory look.
    I don't know if the mounting hole diameter is the same, but electrically I think you can make it work.

    I have a dead round MFD here, mounting hole diameter is about 2 1/16"

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    Moderator beerdart's Avatar
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    You could also use the oval one mounted in the bar pad. Either on you use it would make it easier to have a 1994 e-box to manage the extra wires.

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    Canadian Beaver Inspector jkindt's Avatar
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    Quote Originally Posted by beerdart View Post
    You could also use the oval one mounted in the bar pad. Either on you use it would make it easier to have a 1994 e-box to manage the extra wires.
    I didn't think about changing to the oval one. The ski is a 1994, so it has the '94 e-box. I just was under the impression that you could only use certain MFDs with certain CDIs.

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by jkindt View Post
    I didn't think about changing to the oval one. The ski is a 1994, so it has the '94 e-box.

    I just was under the impression that you could only use certain MFDs with certain CDIs.
    MFD has nothing to do with the CDI - doesn't even connect to the CDI.

    MFD connects to the Yellow wire for RPM (which is also the battery charge control wire), the Red/Purple wire for power, and the Black wire for ground. That is enough to show RPM on the display.

    If the fuel tank level sender uses the standard 33ohm to 240 ohm range for full-empty, then the MFD can show fuel level.

    Oil level would require the oil level sender from an MFD equipped Polaris PWC. The buzzer type oil float is not compatible with the MFD. But you can just leave the buzzer working as it is now.

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