Koso BB642W20 Instructions Manual Download Page 3

“S” type speed sensor bracket

Overview

 

Function Specifications

Button function

Stand by function instruction

NOTE

P.S.

2-3

3-1

3-2

3-3

3-4

Put the magnet into the

brake disc screw hole.

Ex 1: If the disk brake has 

3 screws

 

you can install 

1 or 3 magnets

.

Ex 2: If the disk brake has 4 screws, 

 

you can install 1,2 or 3 magnets.

Ex 3: If the disk brake has 5 screws, 

 

you can install 1 or 5 magnets.

Ex 4: If the disk brake has 6 screws, 

 

you can install 1,2,3 or 6 magnets.

Install the S type sensor

bracket.

Adjust the sensor bracket 

position to make sure the 

sensor is facing the magnet 

to receive good speed signal.

Install the speed sensor

on the bracket.

In order to get a good speed 

signal, the distance between 

the speed sensor and magnet 

should be under 5 mm.

Fuel Level

Display range: 4 segment

The fuel segment will flash when 

  only 1 level left.

If you don’t install the fuel

  wire, the fuel will not display. 

Indicators 

lights

Turn signal (Green)

Neutral (Green)

High beam (Blue)

Engine oil pressure (Red)

EOBD (Amber)

EX. 1 EX.2

EX. 3 EX.4

Odometer

Display range: 0~99999.9 km (mile), 

  automatic reset after 99999.9 km(mile).

Display unit: 0.1 km(mile).

Trip meter A. B

Display range: 0~999.9 km (mile), 

  automatic reset after 999.9 km(mile).

Display unit: 0.1 km(mile).

Fuel / Remaining Distance

Display range: 999.9~0 km (mile).

Design and specification are subject to change without notice!

Press the Select button

• In main screen: press the 

Select button

 to switch between clock, volt.

• In setting screen: press the 

Select button

 to change the setting cursor.

• When the meter is off, press the 

Select button

 to wake up the clock.

Press the Adjust button

• In main screen: Press the 

Adjust button

 to switch between Odometer, Trip A, Trip B, 

  Fuel / Remaining distance.

• In setting screen: Press the 

Adjust button

 to change the setting value.

• When the meter is off, press the

 Adjust button

 to wake up the clock. 

Press and hold the Select button for 3 seconds.

• In main screen: press and hold the 

Select button for 3 seconds

 to switch 

  between fuel, volt, RPM. 

• In setting screen: press and hold the 

Select button for 3 seconds

 to return the 

  main screen

Press and hold the Adjust button for 3 seconds

• In record screen such as Trip A, Trip B ,press and hold the 

Adjust button for 3 seconds

 

  to reset the record, and switching the unit for Mileage and Speed.  

.

Press and hold the Adjust button for 10 seconds

• In Fuel / Remaining distance screen: Reset the Remaining Mileage to 0 and restart 

  the learning.  

.

Press and hold the Adjust button

• In setting screen: To switch the setting value faster by holding pressing the 

  Adjust button.

 

Press and hold the Select buttons for 3 seconds

• In main screen, press and hold the Select buttons for 3 seconds to enter the 

  setting screen. 

When the meter is off, press 

Adjust or Select 

   button

 to wake up the clock function.

The clock will be displayed  30 sec. after 

   waking up.

Clock

24 H.

Digital Volt meter

Display range: DC 5~24 V.

Speedometer

Display range: 0~360 km/h.

   (0~225 MPH)

Display unit: 1 km/h (MPH)

Volt meter

Display range: 4 levels. 

The voltage segment will 

   flash when only 1 level left.

Tachometer

Display range: 15 levels.

Each level represents 1000 

   RPM.

Higher number of magnets installed on the disk brake 

will result in a faster speed display on the gauge.

The letter “N” on the magnets must face the speed 

sensor in order to pick up correctly the speed.

Display range: DC 5 ~ 24 V

Will flash when <8V or >18V

Digital Volt meter

Speedometer

Display range: 0 ~ 360 km/h (0 ~ 225 MPH)

Display unit: 1 km/h or MPH for alternative

Display range: 0 ~ 999.9 km (mile),

automatic reset after 999.9 km (mile)

Display unit: 0.1 km (mile)

Trip meter A / B

Setting range: 300 ~ 2500 mm

Setting unit: 1mm / Sensor point 1 ~ 20

Tire circumference

Display range: 4 segments

Low fuel symbol flashing when 1 segment left.

Fuel level

Display internal

Odometer

Display range: 0 ~ 99,999 km (mile),

automatic reset after 99,999 km (mile)

Setting unit: 1 km (mile)

<0.5 second

Fuel / Remaining

 distance

Clock

12 / 24 H

Volt meter

Display range: 4 segments

Dispaly unit: 1 segment (Low) - DC 11.6~12.0 V

 2 

segment- DC 12.1~12.5 V

 3 

segment - DC 12.6~13.0 V

 4 

segment (High) - DC 13.1 V

Low voltage warning

Voltage segments will flash when only 

1 segment is left.

Backlight brightness 

Setting range: 1-5(Darkest)~5-5(Brightest)

Setting unit: 20 % each segments 
DC 12 V

Effective voltage

Effective temperature range

135.7 X 100.7 X 52 mm

Turn signal(Green) / Neutral (Green)

Oil Light (Red) / EOBD (Amber) / High beam (Blue)

-10 ~ +60 °C

Meter standard

Meter size

JIS D 0203 S2

Around 240 g

Meter weight

Indicator light color

Display range: 999.9 ~ 0 km (mile)

Display unit: 0.1 km (mile)

Setting range: 100

Ω

 - 250

Ω - 

510

Ω - 

1200

Ω

Fuel resistance

Display range: 15 segments

Display unit: 1 segment = 1000 RPM

Tachometer

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