All of our products are “universal”, which means they can fit almost any application on the market, except for those that use the CANBUS system.

How to know if your motorcycle uses the CANBUS system? Unplug your OEM meter and try to start your motorcycle.

• If the engine starts and you can run the motorcycle without the OEM meter, then it is not using the CANBUS system, which means any of our meters will work on your bike.
• If the motorcycle does not start without the OEM meter plugged-in, this indicates that it does use the CANBUS system, therefore, our meters will not function on your bike.

Each Koso unit is supplied with the brackets, wires and sensors that you will need for the installation. In order to install our gauges properly, you will need to have the wiring diagram of your application to be able to match our wires with your harness.  If you want to know how our gauges are wired, take a look on our website, you will be able to find instructions for each gauge so you will know in advance how to be prepared.

For more information about the CANBUS system call your local dealer.
For more information about the compatibility of the Koso meters, please call our technical support line by dialing 450-359-0604.

All of our meters are water-resistant. The IP rating is 66, refer to table below for more information:

The IP Code, International Protection Marking, IEC standard 60529, sometimes interpreted as Ingress Protection Marking, classifies and rates the degree of protection provided against intrusion (body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures. It is published by the International Electrotechnical Commission (IEC).

Solid particle protection

The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects.

Liquid ingress protection

The second digit indicates the level of protection that the enclosure provides against harmful ingress of water.

To test a connector, install a safety pin inside the connector like showed on picture below:

1- Locate the metal tab

2- Slide the battery between the bottom and the tab

Warning : Make sure the tab is OVER the battery.
The connection can’t be done if the tab is under the battery.
*** Make sure that the battery is functional.  If meter does not turn on, try a new battery (CR2032) ***

3 – Close cover and you’re ready to go !

For the battery installation, be careful to place the tabs near the “Close/Open” (battery +) to go over the battery and the other tabs (battery -) to go under it as shown on the pictures:

DO NOT modify the orientation of the pins. The meter will not work if you invert the pins.

All Koso meters need to be set at the odometer to be able to enter setting mode. It will not work if you are on any other function. Then you have to press the ADJUST and SELECT button together for 3 to 5 seconds and you will access the setting mode.

When installing the Engine Oil Plug or Oil Temperature Sensor, use a Torque Wrench to torque from 14 to 21 ft-lb (or from 19 to 28.5 NM).

The larger brass sensor is the oil temperature sensor. This must be installed in the oil pan at the drain plug location.

All our digital speedometers and multifunction meters can display the speed in km/h or MPH. There are two ways to do the switch. Please try option A first, if this is not working, try option B. If you need more information or if you still can’t get it to switch, do not hesitate to contact us 450-359-0604 or info@koso-na.com

Finding the north pole on a speed sensor magnet is a very important step in the setting of the speed sensor in order to have a clear reading.

The “N” or the red line indicates the north side of the magnet.

If you can’t find any marks on the magnet, you can use a compass.
The north face of the magnet will always attract the south on the compass.

• The negative pole of the magnet must face the speed sensor (negative side is identified by the letter N or by a ‘’red trace’’ – if unable to determine, please refer to FAQ – How to find the north pole of a magnet
• The speed sensor must be line-up correctly with the magnets – it has to cross center to center
• If using more than one magnet, you need to make sure that there is the exact same distance between each magnet
• The speed sensor must be 1mm to 2mm close to magnets in order to have a reading
• Were you able to calibrate the meter? If the meter has not been set-up you will not see anything on the screen
•  If calibration was done, please make sure that the tire circumference was calculated as per instructions. Also, the number of pulses entered must correspond to the number of magnets installed on the wheel

1. You must calibrate your meter to 2 000 mm wheel circumference and P1. This is only for test purpose. If you don’t know how to enter calibration mode, refer to your meter’s instruction manual on it’s respective page.

1. Define your speed sensor type. Touch the tip of the sensor with a metal piece.
   1. Active speed sensor : the metal piece will stick to the sensor because the active speed sensors are magnetic.
   2. Passive speed sensor : the metal piece will not stick to it.

1. Now you can proceed with the test :
   1. Active speed sensor : gently rub any metal piece on the tip of the speed sensor.
   2. Passive speed sensor : gently rub the north pole of a magnet on the tip of the speed sensor. (to find the north pole of a magnet, refer to the previous FAQ

1. Results :
   1. If the speed sensor functions properly, you will see some random numbers on the screen of the meter.
   2. If speed does not show up, this could indicate a defect sensor.  In this case, pls call our tech support line 450-359-0604.

Warning !!!

This wideband air/fuel meter must be installed by a certified mechanic. Koso North America is not responsible for any damages that might be cause to the vehicle or its users during of following the installation.

• Do not cut or modify the sensor or wiring harness
• Do not connect or disconnect the sensor when the instrument is working
• Do not apply voltage above 18 volts DC
• Do not open or modify the instrument or sensor
• This instrument should be used as a tuning tool or race instrument.
• Connect the instrument only on 12 volts DC power
• Due to the nature of its use, the BOSCH LSU4.2 sensor is not covered by any warranty.
• Koso air/fuel ratio instrument is covered for any manufacturing defect for a period of 6 months following the date of purchase

Wideband Air/Fuel ratio meter facts

The first role of and oxygen sensor is to communicate to the ECU or the gauge if the engine is running lean or rich. The goal is to have the motor run at 14.7 parts of air for 1 part of fuel (Lambda 1). Having the engine running at 14.7 to 1 would represent the optimal exhaust combustion.

O2 sensor facts

The Koso wideband air/fuel ratio meter is currently using the BOSCH LSU4.2 sensor. The 5 wires wideband oxygen sensor is the most accurate sensor on market. This sensor is able to read from10.0 to 24.0 to 1. The operating temperature of the sensor should not exceed 1 700 degree F. Using the sensor with leaded fuel or on 2 strokes engine will shorten the life of the sensor. Using a sensor bung adaptor will help extend the life of the sensor.

Calibration of the instrument

Each BOSCH LSU 4.2 oxygen sensor is individually laser trimmed with is own value for better results. The LSU 4.2 sensor is using a unique ‘’breather’’ system located on the connector (figure 1) to calibrate himself. This mean the sensor is self calibrating with the ambient air so there is no need to calibrate the sensor. This process replace the ‘’free air’’ calibration procedure when changing the sensor or using the unit on another exhaust system was needed. It would be very important not to block the cap above the breather (figure 2) due to the fact that the sensor is self calibrating by ‘’breathing’’ air from this hole.

Oxygen sensor installation

According to the oxygen sensor manufacturer, for better results, the sensor should be installed at the warmest location on the exhaust system. This would usually represent the first part of the exhaust which would be 300 to 500 millimeters from the piston skirt (figure 3). On a 2 strokes engine, it is strongly recommended to use a sensor bung adaptor to lower the impact of oil contamination (figure 4) on the O2 sensor. The sensor should be assembly with high temperature non permanent grease and tighten at 40-60 Nm. The use of cleaning fluids at the sensor plug is not permitted. Avoid any water or condensation on the tip of the sensor otherwise it might damage the internal components. Sensor must be installed with an angle of at least 10 degree (figure 5). Thus preventing the collection of liquids between sensor housing and sensor element during the cold start phase.

There is 2 quick tests to verify if the sensor is operational.

1- Continuity test

* This test is done on the sensor only.
Use a multimeter to test the Ω of the sensor’s connector at ambient room temperature.

If reading appear on the multimeter, this indicates that the continuity is good, therefore the sensor is OK. At room temperature, the reading is between 2.5 and 5Ω.
If OL (open lead) shows on the multimeter chances are that the sensor would be defective.

* If test 1 fails, do not attempt test 2.

2- Operational test with butane

* This test is done with meter connected to 12V DC power and sensor connected to the meter.
When you turn on the meter, the first thing to display in the screen is the version of the software.
R8 will indicate that this is the latest updated version.  If display shows R7, R6 or less, this means that the meter is over 5 years old.

The meter will then go through its starting set-up by going up to 100 and ready to operate. You may start the test.
Use a butane torch and get the sensor very close to the tip of the torch (you can use a mechanic glove as a kind of seal). Be careful, the sensor becomes hot. Turn on the torch BUT DO NOT LIT THE FLAME. Sending butane to sensor should show reading on the meter (reading vary depending of the quantity of butane sent).

If you have reading on the meter by doing this butane test, it indicates that the sensor is working fine. If not, chances are that the sensor appears to be defective.

When installing the Engine Oil Plug or Oil Temperature Sensor, use a Torque Wrench to torque from 14 to 21 ft-lb (or from 19 to 28.5 NM).

Picture 1: Check for continuity in grips 

To confirm you have continuity, you should see a resistance reading or hear a beep in the multimeter. If there is no continuity, the multimeter will indicate “open lead”, which indicates a problem with the grips.

Picture 2: Heated thumb continuity check

To confirm you have continuity, you should see a resistance reading or hear a beep in the multimeter. If there is no continuity, the multimeter will indicate “open lead”, which indicates a problem with the heated thumb.

Picture 1: Check connector to confirm reading above 12v + DC

Picture 2: Controller harness, confirm reading above 12v + DC in connector

Picture 1: Apollo heated grip continuity check 

To confirm you have continuity, you should see a resistance reading or hear a beep in the multimeter. If there is no continuity, the multimeter will indicate “open lead”, which indicates a problem with the grips.

Picture 2: Check for reading above 12v + DC in connector

Picture 3: Check pin on connector for reading above 12v + DC (bottom right pin)

Picture 4: Check pin for reading above 5v + DC (bottom left)

Picture 5: Check on first side of fuse to confirm voltage and there is no issue with the fuse

Picture 6: Check other side of fuse to also confirm there is no issue