Question about 1993 Harley Davidson XLH Sportster 883

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How to hook up a motorcycle tachometer - 1993 Harley Davidson XLH Sportster 883

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  • wd4ity
    wd4ity Sep 27, 2010

    I have a schematic that should cover your motorcycle but the tachometer is another story. You must have a tachometer that is designed for use on a Harley-Davidson motorcycle. The reason is that Harley, for the most part, has always used a "dual fire" ignition system. You have two spark plugs and they both fire every time the pistons come to top dead center. As far as I know, Harley is the only manufacturer to use this system. It's very much like a two-stroke engine as far as the igniton system is concerned. So, you just can't connect any tachometer to a Harley as you may get an erronous reading. If you want a copy of the schematic, contact me directly at I cannot send it via this forum as the file size is too large. i'll send it as a JPEG picture file. Be sure to remind me of what you want.

    Good Luck


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Hi Anonymous, for more information about your question please visit the website below. Good luck and have nice day.

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How ti install a tachometer

It depends on the tachometer. Some tachometers operate off the ignition unit and others get their trigger from the coil. Also, since a Harley fires both plugs at the same time and every time the pistons come to top center. Therefore, the tachometer must be set up for this, just like for a two stroke engine or you'll get a erronous reading. Any tachometer that you buy should have wiring instructions with it.

I hope this helps
Good Luck

Jul 29, 2010 | 2000 Harley Davidson FXST Softail Standard

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