12 O’Clock Labs | YXZ Speedometer & Gear Ratio Calibration

YXZ Speedometer & Gear Ratio Calibration | 12 O’Clock Labs H3

The 12 O’Clock Labs H3 Calibration device can be used for speedometer correction, gear ratio correction, or both, depending on the application. It corrects inaccurate speed readings on your Yamaha YXZ after modifications such as tire size changes, gear reductions, or transmission upgrades.

When these changes are made, the factory speed signal is no longer accurate. The H3 recalibrates that signal so your speedometer reflects true vehicle speed.

Important Note

The H3 does not change your existing odometer reading.
It corrects the speed signal going forward after it has been altered by modifications.

Key Benefits

• Corrects speedometer after tire, gear, or transmission changes
• Corrects gear ratio signal so the Sport Shift MCU keeps shifting correctly after a gear kit
• Handles speedometer correction, gear ratio correction, or both depending on application
• Restores accurate speed display on factory gauge
• Allows precise adjustment for dialed-in calibration
• Maintains consistent readings across different setups

Compact and Durable Design

• Ultra-compact unit (under 20mm x 20mm)
• Epoxy sealed for weather resistance
• Built to handle harsh riding conditions
• Includes 18" wiring harness

Calibration Features

• Wide adjustment range using percentage or ratio-based correction
• Fine tuning in 0.1% increments
• Multiplier and divider adjustment capability
• Built-in testing mode to verify installation
• Stores max speed for recall on stock gauge

Compatibility

• Works with MPH and KPH displays
• Can convert MPH to KPH or KPH to MPH
• Compatible with 3-wire Hall Effect sensors and 2-wire ground switch sensors

Installation

• Simple plug-in installation for supported setups
• Designed for quick setup and adjustment

Applications

• Yamaha YXZ with larger tires
• Gear reduction kits
• Transmission ratio changes
• Any setup where speed signal has been altered

Additional Setup Resources

If running a YXZ1000 GYTR Gear Reduction Kit:

(Use manufacturer calculators for correct calibration values)

If you have a YXZ1000 GYTR Gear Reduction Kit with 30" wheels, click here for auto calculation.
If you have a YXZ1000 GYTR Gear Reduction Kit with 27" wheels, click here for auto calculation.