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CRF300L Rally'21-24 - 12oClockLabs SpeedoDRD Speedometer & Odometer Calibrator

Purchase CRF300L Rally'21-24 - 12oClockLabs SpeedoDRD Speedometer & Odometer Calibrator

CRF300L Rally'21-24 - 12oClockLabs SpeedoDRD Speedometer & Odometer Calibrator

SKU: 12-H5 Brand: 12oClockLabs
$75.99 $79.99
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Description

If sprocket, gearing or rear-tire changes have made the factory speedometer or odometer inaccurate on your Honda CRF300L Rally 2021-2024, the 12oClockLabs SpeedoDRD provides a compact electronic way to correct the speed signal. This is the model-specific calibrator for riders who want the stock display to read accurately again without replacing the instrument cluster.

The SpeedoDRD supports fine ratio-based correction and works with MPH or KPH displays. It corrects the signal going forward; it does not rewrite mileage already stored in the odometer.

Key Features

  • The smallest electronic speedometer/odometer calibration device in the world
  • Saves max speed, which can be recalled to your stock speedometer gauge
  • Widest calibration range on the market (ratio based and multiplier/divider capability)
  • Built in testing mode to ensure proper installation
  • Easier to setup than any other device on the market
  • Simple plug-in installation for many vehicles using factory OEM connectors
  • Works for any 3 wire Hall Effect Sensor, or 2 wire Ground Switch Sensors
  • Works for vehicles which display MPH or KPH
  • Ability to convert MPH to KPH, or KPH to MPH
  • Ratio based correction in 0.1% steps, up to 99.9% + or -
  • Fractional frequency multiplier & divider with 0.1 steps, up to 99.9 + or -
  • Weather proof design to protect against the elements
  • 18" wiring harness (1.5ft)
  • 3 year product replacement warranty
  • Made in the USA

Fitment

Honda CRF300L Rally 2021-2024. Always verify the model and year in the CRF's Only fitment selector before ordering.

Important Notes

  • This SpeedoDRD application does not fit 2025-current CRF300L/Rally models.

Frequently Asked Questions

When do I need a SpeedoDRD on my CRF300L Rally?

Use it when gearing, sprocket size, rear tire size or another drivetrain change causes the factory speedometer and odometer to read inaccurately.

Does the SpeedoDRD change mileage already stored on the odometer?

No. It corrects the speed signal going forward; it does not rewrite mileage already recorded.

Can it correct MPH or KPH readings?

Yes. The current product information supports calibration for vehicles displaying either MPH or KPH.

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Works great, install and setup are a hassle ( Verified Buyer )
3 out of 5 stars.
Tim M | April 15th, 2026
After upgrading tires from stock and going +4 teeth on the rear sprocket on my 2022 Honda CRF300L Rally, I needed to correct the speedometer. 5 stars. The device works exactly as it should. Once installed, it’s truly plug-and-play and easy to program. My speedo is now more accurate now than stock. -1 star. Installation is a hassle. You have to remove the seat and most of the left-side fairings, and the connector is buried and difficult to access. Not really 12oclocklabs’ fault, but it’s part of the process. -1 star. The online calculator could also be improved. The required model number is hard to see (mine was under dark epoxy), and the inputs aren’t very intuitive. I had to use Google AI to cross-check tire size, sprockets, and stock error to get the correct value (−11.7%). Using partial inputs or simple MPH difference gave inconsistent results. So thus, three stars. Great product that delivers, but expect a tedious install and some extra effort dialing it in. If I wasn’t concerned about keeping the odometer accurate, I’d probably just live with the MPH difference.
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Fits the items below

Click/tap each year button to see the bikes that fit:

  •   2021 Honda CRF300L Rally
  •   2022 Honda CRF300L Rally
  •   2023 Honda CRF300L Rally
  •   2024 Honda CRF300L Rally