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1973 Honda CB750K Spark Plug & Ignition Switch Tools

This 1973 CB750K tool selection covers two different ignition service jobs: reaching an 18 mm spark plug and loosening or tightening the ignition switch nut. Identify the installed plug or switch first. These tools do not replace either component.

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Honda CB1100 CB1000 CB900 CB750 spark plug wrench

Honda CB1100/CB1000/CB900/CB750 Spark Plug Wrench

$5.95 USD
35-0078
Reach deep CB plug holes with this "Tuck Away" 18mm Spark Plug Wrench. Works on 18mm spark plugs, 160mm overall, thinwall design fits into...
Honda CB750K CB550K CB500K ignition switch nut tool

1969-76 Honda CB750K / CB550K / CB500K Ignition Switch Nut Tool

$19.95 USD
35-9119
Loosen and tighten the ignition switch nut without damage using this Ignition Switch Nut Tool.Key Features• Ignition switch nut tool• Tightens and loosens without...
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1973 Honda CB750K · Electrical Tools Buying guide

Match the tool to the plug or switch being serviced

The thin-wall spark plug wrench has a folding handle and a listed 160 mm overall length. The separate ignition switch nut tool is listed for the 1969–76 CB750K ignition switch.

Parts to consider

Honda CB1100/CB1000/CB900/CB750 Spark Plug Wrench 18 mm folding spark plug wrenchThin-wall, 160 mm wrench for 18 mm spark plugs. Its handle tucks into the socket.View part 1969-76 Honda CB750K / CB550K / CB500K Ignition Switch Nut Tool Ignition switch nut toolDedicated tool for loosening and tightening the ignition switch nut, listed for the 1973 CB750K.View part

Plug access and hex size both matter

The plug wrench description specifies an 18 mm working size and a thin-wall design for deep CB plug recesses. Inspect the plugs fitted to your motorcycle before ordering, especially after a plug-type change. Check access around the engine as well as the hex size.

Check a replacement ignition switch separately

The nut tool is listed for the CB750K ignition switch used within its stated year range. If a different switch or mounting nut has been fitted, compare the actual engagement shape with the product photographs. A matching motorcycle year does not verify a changed switch assembly.

Common questions

Does the spark plug wrench fit every spark plug?

It is listed for 18 mm spark plugs, with a thin-wall design for deep CB plug recesses. Check the hex size of the plugs actually installed. Do not assume it fits another hex size because the motorcycle is a CB750K.

Does the ignition switch nut tool include a switch?

No. It is a tool for loosening and tightening the ignition switch nut. The product does not describe a replacement switch, keys or mounting nut. Order those components separately only if your repair requires them.

Should I check a non-original ignition switch first?

Yes. Compare its retaining nut with the tool’s photographs and application before ordering. The listing identifies the 1969–76 CB750K ignition switch; it does not establish compatibility with every aftermarket or relocated switch arrangement.

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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