CRF300L Rally'21-24- SpeedoDRD Calibrator
Description
NOTICE - THIS ITEM DOES NOT WORK ON 2025 to CURRENT CRF300L/RALLY MODELS
This product is required to recalibrate your speedometer and odometer after changing either sprocket size or the rear tire size.
- 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
Reviews
★★★★★★★★★★
3/5 Stars out of 1 Review
Write a Review
5
★
0 Reviews out of 1 are rated 5.
0 Reviews out of 1 are rated 5.
0
4
★
0 Reviews out of 1 are rated 4.
0 Reviews out of 1 are rated 4.
0
1 Reviews out of 1 are rated 3.
1 Reviews out of 1 are rated 3.
1
2
★
0 Reviews out of 1 are rated 2.
0 Reviews out of 1 are rated 2.
0
1
★
0 Reviews out of 1 are rated 1.
0 Reviews out of 1 are rated 1.
0
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.
Fits the items below
Click/tap each year button to see the bikes that fit:
