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  1. #1

    How much is the stock speedometer off by?

    I know on a brand new motorcycle, the factory error percentage is like 5%. How much are these off by. When my speedometer says 70mph, how fast am I really going?


  2. #2
    Quote Originally Posted by onefastmx5 View Post
    I know on a brand new motorcycle, the factory error percentage is like 5%. How much are these off by. When my speedometer says 70mph, how fast am I really going?
    every ski is different, any trim adjustment or ride plate adjustments all affect speedo readouts. you`ll just have to check it against a GPS...

    I typically see 88mph+ on mine and I know it`s way off, at least 16mph off...

  3. #3
    Moderator beerdart's Avatar
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    That depends on many factors as the pic-up in mounted on the ride plate. So when you make changes to the ride plate it will affect the speedo. The best way to measure speed is with GPS.

  4. #4
    improvised tmg97gp's Avatar
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    Mine shows 10mph slower than my GPS says. Yea, the ride plate angle has an effect on the read out too.

  5. #5
    L Carlson's Avatar
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  6. #6
    In other words, no 2 speedometers read the same I guess I'll have to get a GPS then, any suggestions on a waterproof, decent one?

  7. #7
    OLD # 7 IEGPR's Avatar
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    Go with a garmin, and put a sticker over the stock speedo

  8. #8
    Quote Originally Posted by onefastmx5 View Post
    In other words, no 2 speedometers read the same I guess I'll have to get a GPS then, any suggestions on a waterproof, decent one?
    if you just need one for tracking speed, trip etc, then the Etrex series garmins are very good.

    I`m using the yellow garmin Etrex, it does exactly what I need it for...
    trip odometer/speed/sea level etc...

    you can even get the bike mount and put it on your bar if ya have the room...
    Last edited by Pale Rider; 01-19-2010 at 05:24 PM.

  9. #9
    Pale- is that etrex GPS waterproof??

  10. #10
    Quote Originally Posted by onefastmx5 View Post
    Pale- is that etrex GPS waterproof??
    they all are to a standard of 3 ft, but if you use the bike mount, or it`s even good practice to remove the battery cover and remove the batteries while not in use. this way if there is any water or moisture getting inside it will dry out...

    had a good wave crash over top and GPS got submerged, didn`t realize that there was water in the battery, said "oh shyt" removed the cover and batteries were green in about one day... dried it out , popped in fresh batteries and it still works, thank God...

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