Instructions for TBI

Don’t get hung up on TPS voltage. Your TPS is either working or it is not. On 4 strokes, it matters but on 2 strokes, not as much. You can just plug in the ECU and go.

The only time you really need to reset the power valve is if the power valve motor is removed for top end/service. If you want to reset, it doesn’t hurt.

Resetting the adaptive valves is more important. Fuel injection adaptive values are data that is acquired while you ride. Resetting these values is a simple process.

First, turn the red idle screw out until the spring is loose.

Second, make sure the yellow knob is not pushed in or touching the throttle plate. (Initial setting of the yellow knob is all the way out counter clockwise and turned in 28 clicks)

Next, make sure your throttle has free play. (Yes, you think it does but I can assure you it doesn’t.) On the throttle housing, turn both adjusters all the way in. (Hans or Frans at KTM will have the front adjusted out too far which is incorrect. Don’t ask me why!)

Now, take your dongle and plug into the harness and power up the system, then unplug. Wait for it to power down. Then plug back in the dongle and twist the throttle 3 full turns within 25 seconds.

If the procedure performs, you should hear a noise from the fuel pump. Once done, reset your power valve.

This involves holding your throttle about half way and simultaneously plugging in the dongle. Slow count to 8 seconds and release throttle, let it do its thing. Once there is no more noise, you are done.

Now set your throttle free play.

First, adjust the cable in the back then in the front. The back is the pull, the front is the push. The throttle free play should be about the thickness of a nickel. But set where you prefer.

Next, set your idle speed. TBI 2 strokes idle speed should be in the 1500 RPM (+/- 100). The lower you can set it, the better the bike will “carburate” off the bottom. You can set the idle wherever you like though remember 4 strokes are different.