Frequently Asked Questions!

This section is intended as a reference guide. If you can't find the answer to your question here, or in the "How to" page, ask in the forum.

Q. My turbo has a pipe and/or aftermarket filter, and in the higher gears under full acceleration it "cuts out" for a second or so, then the power comes back on. What's wrong with it?

A. Nothing is wrong. The pipe and filter allow the turbo and engine to breathe more freely and require more fuel. The stock ECU isn't programmed for this, so cuts the injection for a moment until settings are back to normal. You can prevent this happening by doing the wiring mod, sometimes called race mode. Click here for details.

 

Q. The LED light on the ECU is flashing. What should I do?

A. The ECU flashes a code, like morse code, if there is a problem with a sensor, the ECU itself, or to tell you that race mode has been activated. The table below shows what action is required.

Problem Code ECU flashes Action required
Throttle Position Sensor is out of range 11 1 long
1 short		 Reset the sensor using the factory tool, or replace sensor
Air temperature sensor 12 1 long
2 short		 Test the air temperature signal (see manual) and replace if necessary
Engine temperature sensor 13 1 long
3 short		 Test the engine temperature signal (see manual) and replace if necessary
Boost sensor 21 2 long
1 short		 Replace boost sensor
Starter switch 22 2 long
2 short		 Test the starter signal and inspect the starter switch for damage
Ignition pulse 23 2 long
3 short		 Test engine speed signal and inspect ignition system for damage
CPU memory 31 3 long
1 short		 Replace control unit
Race mode activated 33

3 long
3 short

 No action necessary. See "How to" section on enabling race mode

Q. I've rigged up a lambda probe in the exhaust to help tune the bike. How do I know how much to increase or decrease the fuelling?

A. Stoichiometric (most complete) combustion is around 14.7:1 air to fuel ratio for gasoline, but peak power is on the rich side of this at around 12:1. Here's a table based on a 1 volt sensor to help you. If you run a 5 volt sensor just multiply the figure in the left column by 5. You can also use this table for tuning methanol, just ignore the A/F column. Note that nitrous cannot be tuned this way as the oxygen content confuses the sensor.

Lambda (mV) A/F Ratio %Adj req'd Lambda (mV) A/F Ratio %Adj req'd
1000 8.5 -29.17 500 14.4 +20.00
960 9.3 -22.50 200 14.5 +20.83
940 9.9 -17.50 168 14.6 +21.67
900 11.0 -8.33 128 14.7 +22.50
860 12.0 0 80 14.8 +23.33
840 12.5 +10.00 60 15.4 +28.33
760 13.9 +15.83 50 15.7 +30.83
720 14.0 +16.67 40 15.9 +32.50
680 14.1 +17.50 30 16.1 +34.17
640 14.2 +18.33      
600 14.3 +19.17      



More soon....