04-24-2017, 04:16 PM
I agree with Popgun's diagnosis - likely caused by a tweaked rear speedo sensor ring or improper air gap (.002" - .005") between sensor ring and the sensor. I've heard of speedos or ABS not working after a bike is brought in for tire change, and the tech bends the sensor ring accidentally, or puts the axle spacers on the wrong side, as on ST1300s.
On Japanese bikes, there is no correlations between the ECM and odometer mileage, not even on Gold Wings. The total mileage is burned into the speedometer's permanent memory. The trip mileage (and clock and radio presets) are recorded in the meter's temporary memory, and are erased when the battery is disconnected.
A while ago, I had to have my speedometer and entire electronic dash display changed under warranty just because the clock was slow! The dealer had to keep my car for a week because they had to be sure I wasn't putting miles on it while they had the factory (in Europe) send a meter assembly with the same mileage. Fortunately, doesn't apply to bikes.
On Japanese bikes, there is no correlations between the ECM and odometer mileage, not even on Gold Wings. The total mileage is burned into the speedometer's permanent memory. The trip mileage (and clock and radio presets) are recorded in the meter's temporary memory, and are erased when the battery is disconnected.
A while ago, I had to have my speedometer and entire electronic dash display changed under warranty just because the clock was slow! The dealer had to keep my car for a week because they had to be sure I wasn't putting miles on it while they had the factory (in Europe) send a meter assembly with the same mileage. Fortunately, doesn't apply to bikes.