Uses a rotary dial to set correction based on an old vs new tire size and old vs new gear ratio table.Īll 3 devices use a simple 4 wire hookup PWR, GND, speedo signal IN, speedo signal OUT. Superlift Truspeed Calibrator $214-$281 (price varies) correction factor increment of 1% Uses dip switches to set an 8 digit binary code based on a conversion table to set calibration. Yellow Box retail $100, correction factor increment of. Version 4 is all digital and uses buttons to set calibration. Uses dip switches and a button to set calibration.

Speedohealer retail $110, correction factor increment of. I found there basically 3 devices available on the market today. Unit is small enough to tuck into the left kickpanel.Ī bit more information on speedometer correction devices. The website has a calculator with specific procedures for setting your percentage correction. Plugged the unit in, calibrated according to the instructions. I then routed the plug down by the left kickpanel. Power to a switched ignition source and ground to metal. I extended my power and ground wires to wire them by the fuse box. I wired the output of the Speedohealer to the wire going to the plug and the input to wire going to the harness. It's located in the left (driver side) plug behind the combo meter. Look for the Gray wire with the Red stripe. These screws have a retainer ring so they can't actually be removed from the combo meter. Loosen those screws until the plugs come out. There are two other screws in the combo meter, those secure the main harness plugs in the back. To do this, pop out the bezel, (you may have to loosen the lower panel) and remove three gray screws, one in the top center of the combo meter and the other two on the bottom left and right. I believe it also has a more accurate correction factor.Īfter debating, I decided to pull the combination meter (aka speedo/tach assy) and wire the Speedohealer right to the wire going to the speedo. There is a Version 4 which is all digital and simpler to use and program. The unit I got is Version 3 which has the DIP switches. So if for any reason you need to return the speedo back to stock specs, just unplug the Speedohealer and plug in the jumper plug. If you look at the second pic, lower right hand corner of the bag you'll see the harness also comes with a jumper plug. It is also available with a universal splice harness which is the one I got. The Speedohealer is a very small unit and has a vehicle specific harness for most Japanese motorcycles only.

Binary editor speedometer calibration