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  • tach acting up

    my tach is acting up when i start it the needle goes all the way to 10 grand and sticks there till i shut it down. could this be a short or a bad connection. or could the po that had it before me wired it up wrong? thanks
    79 xs 1100 spec & 80 xs 1100 g

  • #2
    The tach is run off of the alternator. The first thing I'd look at is the big white connector behind the fuse block mounting plate. Corrosion in that connector (assuming it's still there) can cause lots of issues. Either that or the actual connection at the alternator itself.
    1980 XS850SG - Sold
    1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
    Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
    Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

    Whether you think you can, or you think you cannot - You're right.
    -H. Ford

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    • #3
      I would suspect something wonky inside the tach. Failure caused by the alternator would normally cause intermitent of none working, pegging I would most likely expect to be something electronic inside the tach itself.
      Cy

      1980 XS1100G (Brutus) w/81H Engine
      Duplicolor Mirage Paint Job (Purple/Green)
      Vetter Windjammer IV
      Vetter hard bags & Trunk
      OEM Luggage Rack
      Jardine Spaghetti 4-2 exhaust system
      Spade Fuse Box
      Turn Signal Auto Cancel Mod
      750 FD Mod
      TC Spin on Oil Filter Adapter (temp removed)
      XJ1100 Front Footpegs
      XJ1100 Shocks

      I was always taught to respect my elders, but it keeps getting harder to find one.

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