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1982 Honda CB450SC Nighthawk Custom MPH & KPH Speedometers

Build a custom speedometer installation around the drive your 1982 Nighthawk actually uses. These vintage-style MPH and KPH instruments list mechanical calibration and mounting dimensions, giving you specific points to compare before choosing a scale or planning the bracket.

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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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1982 Honda CB450SC Nighthawk · Speedometers Buying guide

Match the calibration before planning the mounting

The MPH unit uses 2240:60 calibration; the KPH unit specifies 60 km/h at 1,400 cable rpm. Both list approximately 85mm diameter, 55mm depth, 57mm mounting-center spacing and LED illumination. Their fitment information requires custom mounting, with no guarantee of direct installation in the original cluster.

Parts to consider

Custom Vintage Style Speedometer MPH Mechanical MPH displayReads 0–130 mph with the stated 2240:60 calibration. Approximately 85mm diameter and 55mm deep, with 57mm mounting centers and LED illumination; confirm a suitable custom installation.View part Custom Vintage Style Speedometer KPH Mechanical KPH displayReads 0–220 km/h at the specified 60 km/h/1,400 cable-rpm calibration. Its stated housing and mounting dimensions match the MPH option, but drive suitability still needs a check.View part

Check changes that affect the reading

The KPH listing identifies the wheel, speedometer gearbox, tire size and cable-drive ratio as accuracy factors. When any of those have changed, establish the resulting drive requirement before treating either instrument’s appearance or listed model application as enough evidence.

Ask for missing installation details

The listings give useful housing and mounting dimensions, but do not detail a supplied bracket package, wire assignments or warning-lamp functions. Confirm the parts and electrical information needed for your installation before committing to a custom gauge.

Common ordering questions

Will changing the wheel or tire affect the reading?

The KPH listing expressly identifies wheel, speedometer gearbox, tire size and cable-drive ratio as accuracy factors. Check the resulting drive requirement after a change; selecting a familiar-looking instrument does not establish the correct calibration.

What does LED illumination tell me about the wiring I need?

Both speedometers list LED illumination, but the supplied information does not specify voltage, wire assignments or built-in warning lamps. Confirm those details against the motorcycle’s wiring plan before committing to either custom installation.

What should I ask about mounting hardware before ordering?

The listings require custom mounting and state 57mm mounting centers, but do not describe a supplied bracket package. Confirm what hardware is included and plan clearance around the approximately 85mm-diameter, 55mm-deep housing before ordering.

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

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