Honda VFR fuel gauge issue (1990)

Discussion in 'Motorbike Technical Discussion' started by Veeffer, Jul 17, 2004.

  1. Veeffer

    Veeffer Guest


    My VFR has a fuel gauge that shows its running near empty when in fact there is about half a tank of
    fuel left. Also the low fuel warning light goes on at around the same time. Is there any way to
    fix it? Unfortunately the bike does not have a reserve tank, leaving me to start searching for a
    gas station as soon as the meter reads empty or risk running out.

    Veeffer, Jul 17, 2004
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  2. Veeffer

    John Johnson Guest

    This could just the the common characteristic of Honda fuel guages. My
    VFR shows full for the first 80mi or so, then rapidly drops to about
    1/4, then sits at or just above empty for the last 80mi or so. The low
    fuel indicator reliably comes on when I've got around 50mi (back-road
    miles, more if on the highway) of fuel left.
    If the gauge and the light are consistent, I'd say that your best bet is
    to get to know their behavior. You description doesn't point to an
    obvious failure, and is potentially consistant with normal behavior for
    Honda gauges.

    If you think that this can't be normal behavior (it's hard for me to
    know from all the way over here), the first thing to check is the fuel
    level sensor inside the tank. The float might be low or something. If
    you've got a manual, removal is in chapter 6, page 6 of the Honda
    Service Manual (a recommended purchase), inspection procedure is as
    follows (ch 18, p. 17):

    with the sensor removed from the tank, move the arm through it's range
    of travel. The gauge should follow along. Measure the resistance with
    the float in the full up and full down positions. The manual gives the
    following values:

    up: 4-10 ohms (20c)
    down: 90-100 ohms (20c)

    Obviously temperature will affect the resistance, but I don't know how



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    John Johnson, Jul 17, 2004
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