FAQ gps2.0

Speed/Distance signal


1. Do I need the reed switch and magnet?


If your bike has a mechanical (cable-driven) speedometer, you can install the reed switch and magnet, or you can buy the advanced GPS module that calculates the speed from satellite positions.


Since the mid-90's most bikes are being fitted with electronic speedometers, and currently most large and middleweight bikes have one.
The most economic option to receive a speed signal is to tap into the speedo signal wire.
CAN-BUS systems however are more and more common on modern bikes.
It is hard to get an electronic signal from these circuits. A GPS module or reed switch is recommended on those motorcycles.



2. I already have a PRO-OILER with a reed switch and magnet setup - can I swap to the GPS module?


If your bike has a mechanical speedometer, you can install the GPS module without any problem.

Do you need to swap?

No - it just depends how you feel about the reed switch setup, and whether you are affected by cosmetic considerations. (the GPS module can be fitted under the seat or behind fairing panels)


If you are changing bike, then this probably would be the time to swap.


3. What are the differences in operation between using the GPS module, speedo sensor or the reed switch?


In operation, there is no difference at all between the three.

So, your settings and tables are all strictly the same.


However, what you need to understand is that the PRO-OILER has 2 completely separate circuits for dealing with the incoming signals.

Just check the instructions on the inside of the junction box lid.

4. What is the "correction factor" (electronic speedo only)


The PRO-OILER's operating system thinks in terms of "wheel revolutions per pump stroke".

All settings are expressed in this way - for example, table 17 setting 3 = 4175 revolutions per pump stroke.

The GPS module translates the signals from satellites into a pulse that is generated every 2 metres, which is aproximately ONE wheel revolution.

In the reed switch case, 1x wheel revolution = 1x signal = 1:1 ratio


However, for the speedo signal, there are a huge range of possible signals per wheel revolution. This differs between bike make and model.

On a KTM Duke for instance, there may be 6x signals per revolution, while on a Yamaha Fazer there might be 80 signals.

So if your tapping into the bikes' electronic speedo signal, the Pro-Oiler "needs to know" how many signals equals ONE wheel revolution.

The number of signals for ONE revolution is called Correction Factor

You use the PRO-OILER's signal-counting mode (ot) to work out how many signals there are per wheel revolution.

You can set this value manually or automatically, important is to save the correction factor into the Pro-Oiler's processor.

There are instruction video's on YouTube to give you an idea how to programm the correction factor.

          Because the manufacturers can (and do) change the pulses per revolution used by their speedometers, PRO-OILER cannot assume anything.

Important Note:

        If your Pro-Oiler was programmed for use with an electronic speedo, it is mandatory to programm the correction factor, otherwise the display will present a CF-Error on start up (as a reminder)


Do not run the bike with an incorrect correction factor!

In particular, if you programme a lower value than the real value, you can create a dangerously over-rich oil delivery, which can result in an accident due to excessive oil on the tyre.

Example: If you leave the unit programmed with a value of 01.00 when the real value is 17.33 - you will have 17.33 times more oil than required.