Product Description
Your speedometer doesn't actually measure your speed, it counts pulses from a sensor on your wheel or gearbox and calculates speed based on your stock tire size and gearing. Change any of that, a bigger rear tire, different sprockets, a gearing swap, and the reading goes wrong. The SpeedoHealer sits inline with that sensor signal and lets you apply a precise correction factor, so your speedometer and odometer go back to reading true no matter what you've changed on the drivetrain.
Top Speed De-restrictor: TSD stands for Top Speed De-restrictor. Some bikes and ATVs limit top speed by reading the speed signal and cutting power once you hit a set number, the CBR1000RR and ZX-14 are two well known examples. This version can be configured to either freeze that speed signal at a threshold or slow down how fast it climbs, so the ECU never sees the number that triggers the cut. It's off by default and meant for closed track use only, never the street. It works with any standard SH-V4 harness kit.
Key Features
- Correction steps go down to a thousandth of a percent, and the total range covers anything from a minor tire swap to a completely different final drive ratio.
- On bikes that use the speed signal to cap top speed (some Honda, Kawasaki, Yamaha, and Can-Am models fall into this), fixing the signal also removes that artificial ceiling.
- A small detachable button on the harness lets you pull up your top speed reading whenever you want it.
- Save two separate calibration settings and flip between them with one button press, useful if you swap wheels or gearing between street and track.
- Switch the display between kilometers and miles without touching a wire, right from the unit itself.
- Before you button the bike back up, a built-in test mode lets you confirm the wiring is correct.
- Runs on anywhere from 3 to 19 volts, which matters on certain Yamaha models with a lower charging voltage, and drops into standby automatically to save power.
- A 32-bit processor reads the sensor signal in real time, so there's no lag between the wheel and the display.
- Sealed and weatherproofed, with protection built in against reversed wiring, short circuits, and voltage spikes.
- Size: 50 x 30 x 17mm (1.9 x 1.2 x 0.6 inches)
- Weight: 38g
What you get here is the unit only, no harness. Pair it with SpeedoHealer Harness Kit Only to finish the install. If you already own that harness, just grab this unit.
Not sure which part number fits your bike? Click the harness kit link above — its fitment search will find the exact one for you.
FAQ
What's included when I buy this?
Just the unit itself, no wiring harness. You'll need the bike-specific harness kit too, sold separately, or already have one from a prior order.
Is the top speed de-restrictor active out of the box?
No, it ships disabled. You have to turn it on yourself, and it's meant for closed track use only, never the street.
Will correcting my speedometer also raise my bike's factory top speed limiter?
Often, yes. If your stock speedometer reads a few percent fast, the limiter triggers early. Correcting that error usually pushes the limit point out far enough that you won't hit it.
What does the Top Speed Memory function do?
Press and release the remote button and your top speed shows on the display for a few seconds, even while riding. Hold the button down for 2 seconds to reset it.
What does the installation involve?
You need to get to the speed sensor coupler, usually behind a side fairing or under the fuel tank. Once you find it, separate the connector and plug in the SH harness.
