Dakota Digital BD-140 - User Manual

MAN# 650272:C
BD-140
Big Dog digital speedometer
km/h
MPH
Mounting
Remove the speedometer cup from the handle bars. Remove the screw on the bottom of the cup to separate the
front ring from the cup. Unplug the factory 3-pin harness. Remove the two nuts from the back of the speedometer to
release it from the front ring. Install the new speedometer into the front ring and use the original clamp and the supplied
thumb nuts to secure it. Connect factory 3-pin harness into the new speedometer. Reinstall the front ring into the cup and
replace the screw into the bottom of the cup. Reinstall the cup onto the handle bars.
Note: On some models with tank mounted speedometer it may be necessary to trim the mounting studs on the back of the
gauge for proper clearance and fit.
Wiring
The three pin plug on the back of the gauge mates into the factory speedometer wiring harness. Simply unplug the
stock gauge and plug in the new Dakota Digital BD-140.
Black - Ground
Green - Speed signal in
Red - Power +12V key on
Speed Readout
Speed Unit
Message Center
(Odometer,Trip,etc.)
Function Switch
IMPORTANT NOTE! This gauge has an odometer preset option that is only available for the first
100 miles (160km) of operation. See “preset odometer” for instructions.

Summary

Installation

Mounting Instructions

Steps to physically install the speedometer on handlebars.

Wiring Connections

Describes the function of each wire in the speedometer harness.

Speedometer Operation and Setup

Function Switch Usage

How to navigate menus and reset displays using the function switch.

Speedometer Setup Menu

Accessing settings for units, calibration, dimming, and service.

Speed Calibration Methods

Explains Auto Cal and Adjust calibration procedures for accuracy.

Advanced Features and Presets

Night Dimming Control

Adjusts display brightness for nighttime viewing.

Service Interval Setup

Configures the countdown mile meter for service reminders.

Odometer Preset

Allows setting the odometer within the first 100 miles of operation.

Troubleshooting and Support

Troubleshooting Guide

Lists common problems and their solutions for gauge operation.

Service and Repair Policy

Information on sending units for repair and technical consultation.

Warranty Information

Details the 24-month warranty terms and conditions.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The BD-140 Big Dog digital speedometer is a sophisticated instrument designed to provide accurate speed, mileage, and performance information for motorcycles. It features a digital display that shows speed in either km/h or MPH, along with an odometer, two trip meters, a service countdown, and performance metrics.

Function Description:

The speedometer's primary function is to display vehicle speed. It incorporates a speed readout, a speed unit indicator (km/h or MPH), and a message center that cycles through various displays including odometer, trip meters, and other information. A single function switch on the lower front face allows users to navigate through different displays and access setup menus.

Important Technical Specifications:

• Speed Display: Digital readout, switchable between km/h and MPH.
• Mileage Tracking: Odometer, Trip Meter A, and Trip Meter B.
• Performance Metrics: High-speed recall, 0-60mph (0-100kph) time, quarter-mile time, and quarter-mile speed. These timers are zeroed by pressing and holding the switch while displayed and restart when speed reaches zero after the vehicle begins moving again.
• Odometer Preset: Available only for the first 100 miles (160km) of operation. This allows for a one-time preset of the odometer reading to the nearest mile.
• Dimming Feature: Automatic dimming for night viewing, with an option to keep the display at full brightness.
• Power Requirements: Operates on +12V key-on power.
• Wiring: Connects via a 3-pin plug to the factory speedometer wiring harness.
  • Black: Ground
  • Green: Speed signal in
  • Red: Power +12V key on

Usage Features:

• Mounting: The speedometer is designed to replace the factory unit. It involves removing the speedometer cup from the handlebars, separating the front ring from the cup, unplugging the factory harness, and securing the new speedometer into the front ring with supplied thumb nuts. Reassembly follows in reverse order. Note: Some models with tank-mounted speedometers may require trimming mounting studs for proper clearance.
• Function Switch Operation:
  • Toggle Displays: Pressing and releasing the function switch cycles through the speed menu (odometer, trip meters, service countdown, speed unit) and performance menu (high speed recall, 0-60mph time, quarter-mile time/speed).
  • Reset Displays: Pressing and holding the switch for approximately 2 seconds resets the current display (e.g., trip meters, performance timers).
• Speedometer Setup: To enter setup mode, press and hold the function switch while turning the key on. The menu options include:
  • Auto: Selects speed unit and auto-calibrates speed.
  • Adjust: Selects speed unit and allows manual adjustment of calibration.
  • n19HE: Sets night dimming level.
  • 5 SEE: Sets miles to service.
  • PErF: Enables/disables performance readings.
  • InFO: Displays software revision.
  • -odorn: One-time odometer preset (only shown if odometer is less than 100 miles).
• Speed Calibration: Essential for accurate readings, especially after tire or gearing changes. Two methods are available:
  • Auto Cal: Requires driving a measured mile (or km). The speedometer counts pulses from the sensor during this drive, and the calibration is set upon completion.
  • Adjust: Involves driving at a known speed and using the function switch to incrementally increase or decrease the displayed speed until it matches the known speed. Calibration is saved after 10 seconds of no adjustments.
• Night Dimming: The system automatically dims at night. Users can select "on" for automatic dimming or "OFF" for full brightness at all times via the n19HE setup menu.
• Miles to Next Service: A countdown mile meter that can be enabled or disabled. It can be set to count down from 500 to 7500 miles. When it reaches 0, "5 - duE" will display upon key-on. Pressing and holding the switch while "5 - duE" or "5" is displayed resets the service miles to the preset value.
• Performance Menu Setup: The performance readings (high speed recall, 0-60mph time, quarter-mile time/speed) can be turned on or off via the PErF setup menu. If turned off, the odometer will only cycle through mileage readings.
• Odometer Preset (-odorn): This feature allows the customer to preset the odometer within the first 100 miles of operation. It's crucial to select the correct units (MPH or km/h) first. The preset must be to the nearest mile (e.g., 65432 for 65432.1). The process involves incrementing digits using the function switch and saving the final reading.

Maintenance Features:

• Troubleshooting Guide: The manual provides a comprehensive troubleshooting guide for common issues such as the gauge not lighting up, displaying "E-3," showing zero speed, erratic readings, or incorrect readings. Solutions range from checking wiring connections and grounds to recalibrating the speedometer or returning the gauge for repair.
• Service and Repair: Dakota Digital offers complete service and repair, along with technical consultation. Users are advised to contact technical support for a Return Merchandise Authorization (RMA) number before sending units for repair.
• Warranty: The product comes with a 24-month warranty from the date of purchase, covering defects in material or workmanship under normal use. The warranty does not cover damage due to alteration, improper installation, mishandling, misuse, neglect, or accident.

Dakota Digital BD-140 Specifications

General

Brand	Dakota Digital
Model	BD-140
Category	Automobile Electronics
Language	English