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1978 Honda CB750K Spark Plug Service Tool

One mechanical service tool is listed here: an 18mm spark plug wrench with a handle that stores inside its socket. Compare the fitted plug hex and access around the engine. The wrench does not specify which replacement plug your motorcycle needs.

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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...
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1978 Honda CB750K · Electrical Tools Buying guide

Check plug access as well as the hex size

The listing describes a thin-wall wrench for deep CB plug holes, 160mm overall, with an 18mm working size. Those details concern access and engagement, rather than an ignition diagnosis or a replacement plug specification.

Parts to consider

Honda CB1100/CB1000/CB900/CB750 Spark Plug Wrench 18mm tuck-away spark plug wrenchThin-wall design, 160mm overall length and a handle that tucks into the socket; listed for 18mm CB750 plugs.View part

Use the installed plug as the starting point

The wrench is described for 18mm plug hexes. If the engine or plugs have been changed, confirm the actual hex and available access instead of relying on the motorcycle name alone. Its stated overall length helps you judge the tool against the space around your engine.

A compact tool has a specific purpose

The tuck-away handle makes this a compact plug wrench choice, with the handle stored inside the socket. It is still a tool for a defined hex and access arrangement. Replacement plugs, ignition testing equipment and tightening instructions are separate decisions, not contents supplied by this listing.

Buying questions

Does 18mm identify the plug thread?

Here, 18mm describes the wrench size that engages the plug hex. It does not identify thread diameter, reach or heat range. Choose replacement plugs from their application and specifications, then confirm the tool engages their hex.

Is this an electrical fault tester?

It is a mechanical wrench for plug service. The listing does not describe circuit-testing or ignition-diagnosis functions. Diagnose a starting or running problem separately before deciding whether the motorcycle needs replacement plugs or other ignition components.

What is unusual about the handle?

The product description says the handle tucks away into the socket. That is a storage feature, not a separate plug included in the order. The same listing specifies a thin-wall body and 160mm overall length.

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