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1972 Honda CB450K Custom Speedometer Fit Checks

Compare the mechanical requirements of each custom speedometer before choosing a dial for your 1972 CB450K. The MPH and KPH options share body measurements and LED lighting, but list their own drive specifications. Verify the input connection and planned mount with the parts actually fitted.

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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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1972 Honda CB450K · Tachometer & Speedometer Buying guide

Read the drive specification with the physical dimensions

The MPH product states 2240:60, and the KPH product states 60 km/h = 1400 rpm. Both list 85mm diameter, 55mm thickness and mounting centres 57mm apart. Custom mounting is required for either choice.

Parts to consider

Custom Vintage Style Speedometer MPH MPH gauge with listed 2240:60 input85mm mechanically driven speedometer with a 0–130 MPH face and LED illumination. Compare cable fit and the stated drive requirement before planning the custom mount.View part Custom Vintage Style Speedometer KPH KPH gauge with listed mechanical relationship85mm mechanically driven speedometer with a 0–220 KPH face and 60 km/h = 1400 rpm specification. Verify the cable connection and custom mounting fit.View part

Do the lighting check separately from the speed input

LED illumination identifies the lamp feature, while the listed road-speed input remains mechanical. Verify the cable and drive first, then establish the lamp connection details needed for the build. The descriptions do not give lighting voltage, a complete wiring package or an included electronic speed sensor.

Compare the complete instrument space

A proposed mount needs room for the gauge body and connections as well as its circular face. Use the 55mm thickness and 57mm mounting-centre figures with the 85mm diameter. Check what bracket and cable are needed separately instead of assuming either instrument comes as a complete original-layout replacement.

Buying questions

Does LED illumination identify the lighting voltage I should plan for?

The LED feature is stated, but a voltage and complete wiring specification are not provided here. Confirm those electrical details before finalizing the lamp connection. Keep that check separate from the mechanically driven speed input and the gauge’s ratio or KPH relationship.

What matters if I want to switch from MPH markings to KPH?

Use the KPH product’s stated 60 km/h = 1400 rpm specification in the fitted-drive comparison, then confirm cable fit and mounting. Do not treat a change of display units as proof that the existing mechanical arrangement matches the replacement instrument.

Can the linked matching tachometer use the same drive specification?

The speedometer values describe road-speed input. Check the tachometer’s own engine-speed drive and connection requirements before selecting it. Matching styling and the product link do not establish the mechanical compatibility of a complete instrument pair.

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