SPEEDOMETER
Failure to calibrate the speedometer may cause your odometer mileage to increase very rapidly.
The speed input connector plugs into the speed sensor to tell how fast you are traveling. On cable driven
applications, the external sensor connects to the speedometer cable and provides the electric signal. The sensor is
normally bolted directly to the bottom of the speedometer, but can also be remote mounted. The sensor has a 5/8”
course thread fitting that accepts mid-80’s and earlier cables directly. For newer cycles the speedometer cable will
need to be replaced with one having the correct fitting.
With transmissions having the built-in electric sensor, a three-wire harness adapter connects the
transmission speed sensor to the speedometer. This system will also accept most after-market inductive, Hall-
effect, or ground switch sensors. The color code for the three wire harness is as follows: red-sensor power, white-
sensor signal, black-sensor ground.
The speedometer is fully adjustable and calibration is discussed below.
SPEEDOMETER CALIBRATION
The speedometer calibration is done using the function (trip) switch. The speedometer can be calibrated
two different ways. The first method is to place the unit in auto-cal mode and drive exactly one mile (one km for
metric). The second method is to place the unit in adjust mode and the speed reading can be moved up or down
while driving.
The speedometer will provide a reading before it is calibrated, but it may not be accurate. If the
speedometer will only show 00, then it is probably not getting a speed signal. Check all of the wiring and
mechanical connections carefully. If you are using a stock electric transmission sensor, remove it and check for
metal filings on its magnetic end. If you are using a cable-driven sensor, make sure the cable and sensor are
turning. If you are using a gear-tooth or bolt-head sensor, check the spacing to the steel target (these sensors will
not read aluminum or stainless steel targets).
METHOD 1, AUTOCAL
1. Make sure the key is off so the gauge is not powered.
2. Press and hold the function switch.
3. Turn the key on. With the switch still held, start the bike. The display will show “DISPLAY” “ .. “.
4. Release the function switch. The display will switch between “AUTO” (auto cal), “AdJ” (adjust), “CYL”, “SET”,
“BAR”, and “VOLT”. The odometer will show “SELECT”
5. When “AUTO” is displayed press the function switch. This will place the unit in auto calibration mode.
6. Release the function switch. The odometer display will show all zeroes.
7. Drive exactly one mile (or 1km). The odometer will show the number of signal pulses received from the speed
sensor and the trip display should still show “AUTO”.
8. Press and release the function switch. The calibration value will be calculated and stored. The gauge will now
restart in normal mode with the new speed calibration.
METHOD 2, ADJUST SPEED
1. Make sure the key is off so the gauge is not powered.
2. Press and hold the function switch.
3. Turn the key on. With the switch still held, start the bike. The display will show “DISPLAY” “ .. “.
4. Release the function switch. The display will switch between “AUTO” (auto cal), “AdJ” (adjust), “CYL”, “SET”,
“BAR”, and “VOLT”. The odometer will show “SELECT”
5. When “AdJ” is displayed press the function switch. This will place the unit in calibration adjustment mode.
6. Release the function switch. The display shows the speed and the odometer will show “AdJUST”
7. Drive at a known speed. Following another vehicle that is driving at a constant, known speed can do this.
8. Press the function switch. The speed reading will begin increasing until the function switch is released. The
next time the function switch is pressed, the speed reading will begin decreasing until it is released.
9. Once the speedometer is reading correct release the function switch. The new calibration will be saved if no
adjustments are made for 7-10 seconds.
SPEED OUTPUT FOR TURN SIGNAL CANCEL MODULES
The display system also has a speed output signal for cycles equipped with an automatic turn signal cancel
module or cruise control. The white wire from the controller harness should be connected to the module where the
wire from the original analog speedometer was connected. The wire from the original speedometer is usually a
white/green wire.
