Koso DB-01R - User Manual

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INsTRUCTION

1-1

5/16-18 X 22.1L

M5 X P0.8 X 12L

M6 X P1.0 X 12.6L

M6 X P1.0 X 19.7L

M6 X P1.0 X 24L

M8 X P1.25 X 22.5L M8 X P1.25 X 27.5L

M8 X P1.25 X 29L M10 X P1.25 X 28.3L

JIS TYPE a

X-FIGHT

BOOSTER

RUNNER

JIS TYPE A

14 15

10 11

5 6 7

3 4

Thank you for purchasing KOSO DB-01R+ digital LCD meter, before operating the unit, please read the instruction thoroughly and retain it for the

future reference.

Notice

1.The meter is apply for .

2.For installation, please follow the steps described in manual. Any damage caused by wrong installation shall be imputed to the users.

4.Do not disassemble or change any parts excluding the manual descriptio

5.The interior examination or maintenance should be executed by our professionals.

DC 12V

3.To avoid the short circuit, please don't pull the wire when installing. Don't break or modify the wire terminal.

WARNING!

CAUTION!

You could get the installation details from the information behind the mark.

Some processes must be followed to avoid the affection caused by wrong installation.

Some processes must be followed to avoid damages to yourself or the public.

Some processes must be followed to avoid the damage to the vehicle.

MARK MEANING:

PRESS THE

BUTTON ONE TIME

PRESS THE

BUTTON 3

SECONDS

Accessory

Main wiring X 1

Meter X 1

Passive speed sensor X 1

RPM wire set X 1

M10/ S type speed

sensor X 1bracket

Mid-way connect X 12

D6 X 5L mm magnet X 6

M8/ S type speed

sensor X 1bracket

Meter bracket X 1 set

Hexagon socket

screw X 2

2.5 mm spanner X 1 4 mm spanner X 1

M5 gasket X 2

M5 X 12L screw X 2 M4 screw X 2

Please contact if the items you open are not the same, with the above-listed one.the local distributor

Option accessory

Digital speed signal

sensor

Active speed sensor

Disc magnet screw

Digital speed signal

sensor

Digital speed signal

sensor

Digital speed signal

sensor

L type speed sensor

bracket

Meter bracket

(for handle switch)

wh027ba01d(P6-1)

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Questions and Answers

M
Michael MossJul 28, 2025
Why doesn't my Koso DB-01R meter work when the power is on?
- A
  Anthony WilsonJul 28, 2025
  If your Koso Measuring Instruments meter isn't working when powered on, several factors could be at play. First, ensure the wiring is correctly connected and that the fuse isn't broken. Then, verify that the battery voltage is over DC 12V, as an old or broken battery might not supply enough power. Also, confirm that the speed and RPM sensors are correctly wired and that the tire-size setting is accurate.
A
angela84Aug 11, 2025
What to do if fuel gauge does not appear or appear incorrectly on Koso DB-01R Measuring Instruments?
- S
  Sean MccarthyAug 11, 2025
  If the fuel gauge on your Koso Measuring Instruments is not appearing or displaying incorrectly, begin by checking that the red positive wire is well connected. Also, ensure the spark plug is R type; if not, replace it. Next, check your fuel tank, confirm there is fuel inside, and verify the wiring is correctly connected. Finally, double-check your settings.

Summary

Accessory List

Standard Accessories

Lists all included accessories for the KOSO DB-01R+ digital LCD meter, such as the meter unit, wiring, sensors, and mounting hardware.

Optional Accessories

Details optional accessories available for purchase, including various speed sensors and mounting brackets.

Wiring and Installation Guide

Wiring Installation Instructions

Provides detailed wiring diagrams and references for connecting the meter to the vehicle's electrical system.

General Installation Steps

Outlines the step-by-step process for physically mounting the meter and its components onto the vehicle.

Speed Sensor Installation

S Type Speed Sensor Bracket Installation

Instructions for installing the S type speed sensor bracket, including magnet placement and sensor alignment.

L Type Speed Sensor Bracket Installation

Instructions for installing the L type speed sensor bracket, covering front fork mounting and sensor positioning.

Speed Detection Methods

Explains various methods for detecting speed signals using discs, disc gaps, or sprockets, with examples.

Meter Functions and Settings

Basic Function Overview

Describes core functions like speedometer, tachometer, fuel meter, odometer, and indicator lights.

Function Setting Instructions

Details how to set up various functions including clock, tire circumference, and RPM input pulse.

Advanced Settings and Calibration

Tire Circumference and Sensor Point Setting

Guides on setting tire circumference and the number of sensor points for accurate speed readings.

RPM Signal and Tachometer Range Settings

Instructions for configuring RPM signal input, impulse settings, and bar graph tachometer range.

Fuel Gauge and Odometer Settings

Covers setting the fuel gauge resistance and internal/external odometer displays.

Troubleshooting Common Issues

Meter Not Working

Troubleshooting steps for when the meter does not power on.

Incorrect Information Displayed

Guides for resolving issues with inaccurate speed, tachometer, or fuel gauge readings.

Odometer Data Issues

Addresses problems related to the odometer and trip meter not accumulating data correctly.

The KOSO DB-01R+ Digital LCD Meter is a versatile instrument designed for motorcycles and scooters, offering a comprehensive suite of functions for monitoring vehicle performance. It operates on a DC 12V power supply and is built to JIS D 0203 S2 standards, ensuring reliability and durability. The meter's compact dimensions of 130 x 54 x 45.5 mm and a weight of approximately 90g make it suitable for various installations.

Function Description:

The DB-01R+ meter provides a range of essential readouts, including:

Bar Graph Tachometer: Displays engine RPM with selectable ranges of 10,000, 12,000, or 15,000 RPM. This allows riders to monitor engine speed effectively across different performance needs.
Speedometer: Shows vehicle speed from 0 to 360 km/h (0 to 224 MPH), with the option to display in either kilometers per hour (km/h) or miles per hour (MPH).
Odometer: Tracks the total distance traveled from 0 to 99999 km (mile). It automatically resets after reaching 99999 km (mile), with a display unit of 1 km (mile).
Trip Meter A/B: Offers two independent trip meters, A and B, for measuring shorter distances. Each trip meter displays from 0 to 999.9 km (mile) and automatically resets after reaching 999.9 km (mile), with a display unit of 0.1 km (mile).
Fuel Meter: Indicates fuel level with 6 levels, each representing 16.6% of the tank capacity. An insufficient fuel warning is triggered when only 1 grid remains, and the fuel reserve symbol begins to flash. When the fuel level reaches Stage 0, the fuel indicator lights up.
Clock: Displays the current time, with settings for both hour and minute.
Indicator Lights: Features a set of indicator lights for critical vehicle status:
- High beam (blue)
- Oil (red)
- Turn signal (green)
- Neutral (green)
- Fuel (yellow)
- Engine Check (yellow)
- EOBD (purple)

Important Technical Specifications:

Power Supply: DC 12V.
Effective Temperature Range: -10°C to +60°C.
Meter Standard: JIS D 0203 S2.
Dimensions: 130 x 54 x 45.5 mm.
Weight: Approximately 90g.
Tire Circumference Setting Range: 300 to 2,500 mm, with a setting unit of 1 mm and a sensitive point range of 1 to 20. This allows for precise speed calibration based on tire size.
RPM Input Pulse Setting Range: 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6. This enables compatibility with various engine types and ignition systems.
Fuel Meter Resistance Setting Range: 100 Ω, 250 Ω, 510 Ω, 1200 Ω. This ensures compatibility with different fuel senders.
Speed Sensor: The kit includes a passive speed sensor with a maximum signal reading of 20 points per turn. Optional active speed sensors are available, offering up to 60 points per turn for greater accuracy and flexibility in magnet placement.

Usage Features:

User-Friendly Interface: The meter features a clear LCD display and two buttons, "Adjust" and "Select," for easy navigation and setting adjustments.
Backlight Color Selection: Users can choose from blue, orange, or purple backlight colors to suit their preference or visibility needs.
Customizable Settings:
- Tire Circumference: Allows for precise calibration of the speedometer by setting the tire circumference. The manual provides detailed instructions for measuring and inputting this value.
- RPM Input Pulse: Configurable to match the ignition system of the vehicle, ensuring accurate tachometer readings.
- Fuel Sensor Resistance: Adjustable to match the resistance of the vehicle's fuel sender for accurate fuel level display.
- Bar Graph Tachometer Range: Selectable RPM ranges (10,000, 12,000, 15,000 RPM) to optimize the display for different engine characteristics.
Speed Sensor Installation: The manual provides detailed instructions for installing both S-type and L-type speed sensor brackets, including guidance on magnet placement and adjusting the distance between the sensor and magnet (recommended under 2 mm for optimal signal). It also highlights best practices for detecting speed signals from disc screws, disc gaps, and sprocket gaps, emphasizing the importance of consistent spacing for accurate readings.
Wiring Installation: Comprehensive wiring diagrams are provided for connecting the meter to the vehicle's electrical system, including main switch wiring, RPM wiring (for ignition coil positive pole), and fuel indicator wiring. Specific color codes for various motorcycle brands (YAMAHA, HONDA, SUZUKI, KAWASAKI, KYMCO, SYM, PGO, BUELL, CAGIVA, DUCATI, H-D, APRILIA, MV, BMW, TRIUMPH, BENNELLI) are included, though a note advises that colors may vary by model.
Installation Instructions: Step-by-step instructions for mounting the meter bracket on the handlebar and fixing the meter board are provided, including tips for adjusting the meter to the best visible angle.

Maintenance Features:

Troubleshooting Guide: The manual includes a dedicated troubleshooting section to help users diagnose and resolve common issues, such as the meter not powering on, incorrect readings, or fuel gauge malfunctions. It suggests checking wiring connections, battery voltage, sensor installation, and setting configurations.
Professional Maintenance: For internal examination or maintenance beyond basic troubleshooting, users are advised to consult professionals.
Wiring Integrity: Emphasizes the importance of not pulling wires during installation to avoid short circuits and not breaking or modifying wire terminals.
No Disassembly: Users are cautioned against disassembling or changing any parts of the meter except as described in the manual.
Safety Warnings: Important warnings are provided regarding correct installation procedures to prevent damage to the user, public, or vehicle. For instance, incorrect fuel wiring installation can damage the meter.
Accessory Check: Users are advised to contact their local distributor if the items received do not match the accessory list.
Firmware Updates: While not explicitly stated, the "Design and specification are subject to change without notice!" note suggests potential for future updates or revisions to the product.