Koso H-D Tachometer — Harley-Davidson Electra Glide, Softail Heritage Classic, Electra Glide Classic (1955-2026)

Koso H-D tachometer with stepper motor for stable needle response on vibration-prone Harley applications. Features an illuminated needle for night visibility, digital odometer and trip meter on the LCD screen, and compatibility with OEM speed sensors.

Features

• Stepper motor for stable needle response
• Auto-scan function activates on engine start
• Illuminated needle for night readability
• Digital odometer and trip meter display
• Works with OEM speed sensors

Specifications

• Brand: Koso
• Manufacturer Part #: BB551B20
• Length: 4 in
• Width: 3 in
• Height: 4.75 in
• Weight: 0.922 lbs
• Country of Origin: China (Taiwan)

Frequently Asked Questions

Will this tachometer work with my stock Harley speed sensor?

Yes — this gauge is designed to work with OEM Harley speed sensors without adapter or modification.

Does the needle move smoothly at idle and cruise?

Yes. The internal stepper motor stabilizes needle movement across all RPM ranges, even on high-vibration engines.

Is the display backlit for nighttime riding?

Yes. The needle is illuminated, and the digital LCD odometer and trip meter are also backlit for easy night visibility.

What does the auto-scan function do?

When you start the engine, the auto-scan function runs the needle across the dial to verify operation before settling to actual RPM.