S2R 1000 gauge bug

[JohnDRitter]

Hello New here,
Purchased my first Ducati past February. A fine 06' S2R1000 (yes the amazing swollen plastic tank bike). Well after a couple months of romantic riding. My gauge developed a weird issue. ONLY when i "gun it" or go for a hard pull does the tach offer a false reading once i come back to a stop. So lets say i hit an on ramp for the freeway. Give it a good pull to blow every one away thats out to kill me then exit and come to a stop light. My tach would be a solid 2K off. Idle will be 0 and doing about 40mph will read like 2K. Bike runs fine still and speedo seems to be fine. Cleaned a few connectors. Battery tested 12.5 resting and 14.48 idle with little variation when revved. Tonight i took my dash off. Took the face plate off and just lightly blew it out and dusted it with electronics cleaner in a few place. Put it back on and test road it. Problem is still there but after coming to a stop the tach now reads above. so idle is reading 2-3K. What demon is afflicting my S2R?! Its only after really getting on it. warmed up or not. Thanks for any and all help.

[2WheelsFTW]

In the automotive world I would look at an RPM pick-up (Distributor, cam sensor, crank sensor ect ect), can anyone shed any light how the S2R's or any Duc for that matter pick up the rpm signal?

[Speeddog]

If you turn the key off, then back on, does the needle reset to zero, or is it still off?

[JohnDRitter]

we i reset the dash after turning the bike off then back on it zeros back out and returns to normality. but im not convinced its a needle issue since it only happens when i give the bike a strong pull.

[Dirty Duc]

In the automotive world I would look at an RPM pick-up (Distributor, cam sensor, crank sensor ect ect), can anyone shed any light how the S2R's or any Duc for that matter pick up the rpm signal?

In Magneti Marelli managed Ducati-land, the tach signal sent to the gauge is "filtered" through the ECU. If the ECU had a bad tach signal, the bike would likely exhibit strange running behavior... but it's pretty simple to test. Swap the RPM pick-up with the speedo sensor. If strange gauge behavior switches... there's a problem with the sensor (in my opinion this is highly unlikely).

There are some potential pitfalls in the wiring... check ground wires for resistance/looseness.