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1984 Honda CB450SC Nighthawk Custom Speedometer Planning

With two custom speedometers listed for the 1984 CB450SC Nighthawk, this order starts with a compatibility discussion. Identify the mechanical drive and cable arrangement you intend to use, then compare calibration and physical specifications before selecting the MPH or KPH scale.

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Honda CB custom vintage style mph speedometer front view

Custom Vintage Style Speedometer MPH

$99.95 USD
03-0760
Custom Vintage Style Speedo (MPH) - Mechanical speedometer ratio: 2240:60. Before ordering, confirm the drive ratio, cable or electrical connection, gauge diameter, and mounting...
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Honda CB custom vintage style kph speedometer front view

Custom Vintage Style Speedometer KPH

$99.95 USD
03-0761
Custom Vintage Style Speedo (KPH) - Mechanical speedometer 60 km/h = 1400 rpm Before ordering, confirm the drive ratio, cable or electrical connection, gauge...
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1984 Honda CB450SC Nighthawk · Tach & Speedo Buying guide

Use the drive and installation plan to narrow the choice

Both instruments list the 1984 Nighthawk with custom mounting required. The MPH display spans 0–130 mph, while the KPH display spans 0–220 km/h. Each has its own stated calibration; the common housing dimensions do not establish that either will suit the drive currently fitted.

Parts to consider

Custom Vintage Style Speedometer MPH MPH gauge with specified calibrationA mechanical 0–130 mph display using 2240:60 calibration. Its calibration requires 2,240 cable revolutions per mile; compare that requirement with the drive and connection planned for this motorcycle.View part Custom Vintage Style Speedometer KPH KPH gauge with specified calibrationA mechanical 0–220 km/h display calibrated to read 60 km/h at 1,400 cable rpm. Its approximately 85mm housing and 57mm mounting centers need a custom mounting and clearance check.View part

Take drive changes into the fitment discussion

The KPH information names the wheel, speedometer gearbox, tire size and cable-drive ratio as accuracy factors. Give the supplier those details for the motorcycle you are building. The stated application is conditional on a suitable custom installation and cannot settle changes made to the drive.

Request the illumination specification before buying connections

LED illumination is a listed feature of each gauge. The current information does not provide operating voltage or wire assignments. Obtain that specification alongside the mounting information so the electrical parts ordered for the project match the chosen instrument.

Custom speedometer ordering questions

How should I compare an advertised drive ratio with these gauges?

The MPH gauge uses 2240:60 calibration, requiring 2,240 cable revolutions per mile. The KPH requirement is 60 km/h at 1,400 cable rpm. Compare the intended drive with the chosen instrument’s stated requirement before ordering.

Which electrical details are needed before I buy illumination connections?

Ask for the operating voltage and wire assignments for the chosen gauge. The listings confirm LED illumination but leave those details unstated, so they cannot identify the appropriate connections for your motorcycle’s planned wiring arrangement.

What should I verify if wheels or speedometer-drive parts have changed?

Confirm the wheel, speedometer gearbox, tire size and cable-drive ratio used in the project. The KPH listing names all four as accuracy factors. Establish the resulting drive requirement before selecting either instrument on the strength of model application alone.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

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