REVO M109R/M1800R Exhaust Servo (FI) eliminator
The stock exhaust of the Suzuki M109R/M1800R has a design called “Suzuki Exhaust Tuning (SET)”. The ECM will calculate the transmission gear, throttle position, rpm and speed to open up the exact angle of the exhaust valve and also allow appropriate back press. It will also close up the exhaust valve when the engine is in idle or the speed is at zero for the purpose of lowering the noise. This could not happen without a motor server inside the exhaust that could control two cables to adjust the opening angle. From our research, the ’06 ’07 model year M109R opened 30% in idle and operate according to the accelerator, even if the speed was at zero. In ’08-‘10, the valve only operated at shift gear or at speed. After ‘11, it advanced to only engage in light of the ride load.
There is a kind of Pully Cam that could install on the server motor to confuse the ECM for still controlling over the exhaust valve. However, it would soon be discovered by the server motor because the server is without resistant. Rumor has it that without the seven pin of the computer plug-in, it would block the transmission of error signal back to the ECM and the computer still has no clue of the missing valve. This could only disable the FI signal light but could not solve anything about the missing valve. REVO Servo Eliminator will give a signal telling “full open” to the server motor no matter what the ECM signal is. In this case, the ECM will soon realize that the exhaust valve has opened and will give a richer air–fuel ratio. Without this negative ECM calculation impact, your modified air intake and exhaust would perform even better.
By the way, you can remove the server motor and the cables from the stock exhaust, so the valve will remain full open. Meanwhile, when simply plug in the REVO Servo Eliminator, you could immediately in possession of a better exhaust clamor and much more direct acceleration.