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1974 Honda CB450K Gauge & Cable Buying Checks

Identify the speedometer arrangement on your 1974 CB450K before choosing replacement parts. The cable gives a Honda reference and overall length, while the custom gauges specify mechanical input. A protective plug needs its own opening comparison, rather than supplying missing cable or calibration details.

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Currently viewing Tach & Speedo

Honda motorcycle parts

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Honda CB750 CB550 CB500 CB450 CB400 speedometer cable 44830-425-870

Honda CB Speedometer Cable ~ Replaces 44830-425-870

$22.66 USD
51-2304
Replace your CB speedometer cable with this Speedometer Cable in black, replacing OEM #44830-425-870. End-to-end length 38.5". Made in Japan.Key Features• Speedometer cable, black•...
Honda CB1000 CB900 CB750 CB650 speedo gear plug

Honda CB1000/CB900/CB750/CB650 Speedo Gear Plug

$43.95 USD
29-0538
Keep your speedo drive gear clean with this Speedo Gear Plug, 15mm outer diameter, 22mm long.Key Features• Speedo gear plug• 15mm outer diameter, 22mm...
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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1974 Honda CB450K · Tach & Speedo Buying guide

Match the input, connections and mount before completing the order

The MPH gauge lists 2240:60 and the KPH version 60 km/h = 1400 rpm. The cable references Honda 44830-425-870 and measures 38.5 inches end-to-end. Gauge mounting is custom; LED illumination has separate connection requirements.

Parts to consider

Honda CB Speedometer Cable ~ Replaces 44830-425-870 Referenced black cable, 38.5 inches overallJapanese-made speedometer cable replacing Honda 44830-425-870. Compare end-to-end reach and both connections, especially when retaining a changed drive or gauge.View part Custom Vintage Style Speedometer MPH Custom MPH gauge with mechanical input0–130 MPH instrument listed at 2240:60 with LED illumination. Verify the drive and cable fit, then plan a suitable custom mount.View part Custom Vintage Style Speedometer KPH Custom KPH gauge with mechanical input0–220 KPH instrument listed at 60 km/h = 1400 rpm. Compare its input requirement and connections separately from scale preference and mounting appearance.View part

Related parts: Protective speedo gear plug, 15mm OD × 22mm

Keep cable fit beside the selected drive specification

A compatible mechanical input needs a cable connection that actually fits at both ends. The replacement cable description gives length and reference without exact thread or drive-tip dimensions. Confirm those missing interfaces before combining it with a custom gauge, rather than allowing the motorcycle application to decide the entire arrangement.

Reserve separate space for the mount and connections

The gauges list 85mm diameter, 55mm thickness and 57mm mounting centres, with custom mounting required. Compare the bracket and space behind the instrument against those figures. Identify cable and lamp connection requirements separately, since LED illumination does not establish lighting voltage or a complete set of supporting installation parts.

Buying questions

How should I compare the choices when the old gauge’s input specification is unknown?

Identify the retained drive and the mechanical input it provides, then compare the exact replacement gauge requirement. The MPH and KPH listings give their own values. Confirm cable fit and mounting separately; a similar dial or motorcycle application cannot establish the unknown calibration.

Which cable details matter after relocating the instrument?

Compare the reach required by the new layout with the stated 38.5-inch end-to-end length. Verify both attachment interfaces as well. The description does not specify exact end threads or drive-tip dimensions, so obtain those details where the retained components are uncertain.

What should I check before adding the drive-protection plug?

Compare the actual protective opening with the plug’s 15mm outer diameter and 22mm length. Its stated purpose is keeping the original speedo gear clean. Assess changed-drive requirements separately; those plug measurements do not establish cable fit, a drive ratio or a complete conversion.

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