The jerking at low revolutions was previously improved by cleaning the throttle body, but although the engine is not stalling, there is still a strange feeling around 3000 rpm, so this time I will try a different solution.

Due to EU exhaust gas regulations, TDM900 has two intake ports in the air cleaner box, one for normal use and one for low RPM.

The amount of air that occurs during this switch is what causes the jerky motion. Therefore, the air valve is disabled so that the normal flap does not close at low revs.

There are apparently several ways to do this, but this time I’ll cut off the signal from the ECU to the valve.

Actually, I had researched this measure as soon as I got this TDM900 and found out about it, but when I asked the previous owner, he said it didn’t have much effect, so I didn’t implement it. However, the bike was jerking around 3,000 rpm when using partial throttle, so I decided to give it a try.

In order to access the ECU, so removing the left side cover.

The method is simple; just unplug signal wire number 8 from the ECU.

Unplug this brown/black wire and insulate it.

The wiring can be removed by pressing the white notch with a flat head screwdriver.

Don’t forget to put the notch back.

Insulate the disconnected wires.

After the measures were taken, the acceleration at low rev. was clearly improved, and the jerky feeling was reduced, making the bike much smoother. Of course, the engine no longer stalls. If you are having trouble with the rattling of your TDM900, please give it a try (at your own risk, of course).