Any sprocket or gearing change (up or down)
Tire profile change or using any of the new oversized tires
Harley’s changing to 6-speed and/or overdrive transmissions
Anyone who’s tired of poor OE speedometer inaccuracies
RIDE WITH CONFIDENCE
Speedometer error in motorcycles is a serious problem and beyond simple gearing changes and/or rear tire size changes, the factory’s inaccuracy is unfairly increasing mileage readings on vehicles, ultimately hurting values.

There are a number of reasons why speedo error in motorcycles exists.
FACTORY INACCURACY
Stock speedometer calibration in motorcycles direct from the manufacturer
can read 2-10% fast.
GEAR, SPROCKET, TRANSMISSION CHANGES
Gearing changes can trigger inaccurate speedometer readings. Changing sprockets can bring on added speedometer error. Changing transmissions affect speedometers, then requiring recalibration.
WHEEL AND TIRE CHANGES
Wheel size, wheel diameter and/or tire size changes can alter speedometer calibration.
An easy way to fix incorrect motorcycle speedometer calibration is with Speedo Tuner®. Speedo Tuner® is small instrument used to recalibrate speedometer error in most motorcycles. Click here to see if your bike is listed on the application chart.
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