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Dakota Digital BD-140 Instructions page 2

Big dog digital speedometer

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SPEEDOMETER
Failure to calibrate the speedometer may cause your odometer mileage to increase very rapidly.
The speedometer has been factory calibrated to a nominal speed signal which should be accurate on most cycles. The
speedometer is adjustable to allow for tire and gearing changes. The speed reading should be verified by following
another vehicle or checking time over a known distance. Speedometer calibration is described on the following pages.
FUNCTION SWITCH
The push button function switch on the lower front face of the speedometer allows access to all of the mileage,
and performance information. Pressing and releasing the function switch toggles through the different displays. Pressing
and holding the switch for about 2 seconds will reset the current display. The display sequence is as follows:
SPEED MENU

. trip meter mileage A
. trip meter mileage B


PERFORMANCE MENU

. 0-60mph time (0-100kph)
. quarter mile time

The 0-60 and ¼ mile timers are zeroed by pressing and holding the switch while that timer is displayed. The timer will not
restart until the speed reaches zero and then you start driving again.
SPEEDOMETER SETUP
Press and hold the function switch on the front of the speedometer while turning the key on to enter the speedometer setup.
Menu
Description

select speed unit and auto calibrate speed

select speed unit and adjust calibrate speed

set night dimming level

miles to service setting

enable/disable performance readings

display software revision

one-time odometer preset (only shown while odometer has less than 100 miles)
SPEED CALIBRATION
When performing speedometer calibration, enter the speed setup mode by pressing and holding the function switch while
turning the key on and starting the bike, once the bike is running, release the switch. This avoids any problems with the battery
voltage dropping during engine cranking.
There are two methods for calibrating the speedometer, auto cal and adjust. Either one can be used. Auto cal requires that
you have one measured mile marked out (km for metric), this is the best method to start with if your speedometer needs a lot of
correction. Adjust requires you to follow another vehicle going at a set speed, time your self over a mile to determine your speed, or
use a hand held GPS with speed indication.
Auto Cal
Press and release the switch until "" is displayed, then press and hold the switch until "  " is displayed.
Release the switch. The display will switch to "" and light up the current speed unit (MPH or km/h).
Press and hold the switch to keep the current unit or press and release the switch to change the unit.
Next the speedometer will display "" and the message display will show zeroes. You should now begin driving the measured
mile. The message display will count the number of pulses received from the sensor. The message display cannot be used to
determine when a mile has been driven. Once you reach the end of your marked mile, press and release the switch again. The
calibration is now done.
Adjust
Press and release the switch until "" is displayed, then press and hold the switch until "  " is displayed.
Release the switch. The display will switch to "unit" and light up the current speed unit (MPH or km/h).
Press and hold the switch to keep the current unit or press and release the switch to change the unit.
Next the system will restart with "" on the message display. The speedometer will show the speed reading. Begin driving
at a known speed. When the switch is pressed, the speedometer reading will begin increasing until the switch is released. The
next time the switch is pressed, the reading will begin decreasing until it is released. When the speedometer is correct you can
release the switch. The new calibration will be saved if no adjustments are made for 10 seconds.
odometer mileage
count down to service (if programmed)
Speedometer will show km/h (or MPH if metric)
high speed recall
quarter mile speed
MAN# 650272:C

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