Speedo error

[TheGza]

Bike is brand new, yes it works while riding, bike is tip top

 

[Got-Busa?]

That's what I'm saying, in gear... Wheel spinning, gave it a little gas and no speed.

Gen-3 wheel speed sensor is on the front wheel. That’s why when you wheelie, it doesn’t work…

 

[Miklos_HUN]

I checked the accuracy with a GPS watch. Obviously I let enough time for GPS to catch up, by using cruise control on straight road. When setting a speed for CC and then returning to it, the dash shows the exact number, that's what I used.

52km/h on dash = 49.2km/h on GPS. (this was confirmed by roadside speed trap, it showed 49km/h)
53km/h on dash = 50.1km/h on GPS
133km/h on dash = 129.0km/h on GPS.

Accurate enough for me. On my 2018 GSXS1000 with the same method there was more, approx double the difference.

 

[TheGza]

Gen-3 wheel speed sensor is on the front wheel. That’s why when you wheelie, it doesn’t work…

And that's what I thought but if you read the manual it states that it's on the rear wheel lol. At least with no Speedo here available I can change the sprocket without worries now. That was my whole reason for checking in the first place

 

[SS4Luck]

Mines off a bit. 85 on the Speedo is 80 on GPS. Just off enough to be annoying now that I know it lol

 

[dcnblues]

I was hoping that cracking the ECU would give us a tunable speedo. One you could adjust. Not yet I guess...

 

[Spudley]

That would be extremely cool if we could adjust for all component error-correction, i.e. sprocket choices, tire diameters.

 

[RedBusarider]

ON my Gen 1 I went down (I think) two teeth on the rear sprocket and went from a 190 tire to a 195.
My speedo matches my GPS exactly when cruising - not so much when winding it out.
It can't keep up.