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1972 Honda CB350K4 Custom Instruments

The current instrument choices are custom mechanical speedometers for a modified K4 cockpit. Choose MPH or KPH to suit your needs, then establish drive compatibility and mounting space. Neither unit is presented here as an original K4 instrument replacement.

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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 CB350K4 · Custom Instruments Buying guide

Plan the speedometer conversion as an assembly

A usable gauge installation needs the correct mechanical drive, cable connection, support and illumination wiring. Compare those details before selecting between the two dial-unit options.

Parts to consider

Custom Vintage Style Speedometer MPH Custom mechanical MPH speedometer0–130 MPH dial, 2240:60 drive ratio, 85mm body and LED illumination. Custom mounting is required.View part Custom Vintage Style Speedometer KPH Custom mechanical KPH speedometer0–220 KPH dial; 1400 rpm at 60 km/h. An 85mm body with LED illumination and custom mounting requirements.View part

Match drive and display units

The MPH instrument specifies a 2240:60 mechanical ratio. The KPH version specifies 1400 rpm at 60 km/h. Compare the chosen specification with the motorcycle’s drive and cable arrangement before ordering; a CB350 model tag does not establish a plug-in conversion.

Check the available mounting space

Both bodies measure 85mm in diameter and 55mm thick, with rear mounts and 57mm mounting centers. Custom mounting is required. Plan bracket clearance and the separate LED illumination connection before purchase, preserving readable placement and clearance from the moving controls.

Buying questions

Are these original-style direct-fit K4 instruments?

They are custom speedometers that require custom mounting. Confirm the drive ratio, cable connection and physical fit before ordering rather than assuming they reuse the K4 instrument mounting arrangement.

Which speedometer should I choose for metric roads?

The KPH version has a 0–220 KPH dial and specifies 1400 rpm at 60 km/h. Verify that drive specification against the motorcycle before choosing it simply for the metric scale.

Does LED illumination mean the speed signal is electronic?

No. Both instruments are described as mechanically driven speedometers with LED illumination. The mechanical drive connection and the illumination wiring are separate compatibility checks.

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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