Gear Position

[ryansoltau]

Hi
We have a Yamaha R6 and I had some questions about measuring gear position. We don't have an actual gear position sensor...is there any other way to measure gear position from other sensors. We have a transmission speed sensor, is there any logic that can take crank speed, transmission speed to calculate a gear position if you input all gear ratios into M1 Tune? If it sees crank speed and trans speed could it recognize a gear if that ratio of speeds falls into one of the gear ratios you input?

[NathanB]

It really depends on what firmware you are using, however the gear estimate is the channel you would be looking for.

Gear estimate.png (240.6 KiB) Viewed 2593 times

As it is a calculation, it is far to slow to be used in a gear shift strategy however.

[ryansoltau]

Thanks
I found Wheel Speed Rear Drive Sensor Resource....would this be a better channel to use for measuring trans speed to calculate a gear position?

The stock Yamaha R6 has a speed sensor which measures directly off a free-floating gear on the input shaft, that is always in mesh with a fixed gear on the output shaft.

Therefore, the free-spinning gear on the input shaft which is read by the speed sensor is always turning at output shaft speed, with the exception of the ratio between the free floating gear on the input shaft, and the fixed gear on the output shaft, which we have measured as 23/20 or 1.150. It seems this would be a way to measure output shaft speed in reference to crank speed to get a ratio when the vehicle is moving.

For our scenario, would we then set the Wheel Speed Rear Drive Location to "Output?"

Thank you for any clarification on this.

Ryan