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Honda CB1100 CB1000 CB900 CB750 spark advancer cover gasket 30372-425-000
Spark advancer cover gasket, SKU 18-7059: product photo and 1980 Honda CB750K (A) Left Crankcase Cover fiche with the part location highlighted. Example diagram; check listing for fitment.
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB1100 CB1000 CB900 CB750 spark advancer cover gasket 30372-425-000

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Load image into Gallery viewer, Honda CB1100 CB1000 CB900 CB750 spark advancer cover gasket 30372-425-000
Load image into Gallery viewer, Spark advancer cover gasket, SKU 18-7059: product photo and 1980 Honda CB750K (A) Left Crankcase Cover fiche with the part location highlighted. Example diagram; check listing for fitment.

Honda CB1100 / CB1000 / CB900 / CB750 Spark Advancer Cover Gasket ~ Replaces 30372-425-000

18-7059
$7.95 USD
In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,329 store reviews
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB1100 / CB1000 / CB900 / CB750 Spark Advancer Cover Gasket ~ Replaces 30372-425-000
$7.95 USD
Description

Replace your DOHC CB's spark advancer cover gasket with this Spark Advancer Cover Gasket (rubber O-ring), replacing OEM #30372-425-000.

Key Features
• Spark advancer cover gasket (rubber O-ring)
• Replaces OEM #30372-425-000

Fitment / Compatibility

• Honda CB750K (1979‑82)
• CB750F (1979‑82) Supersport
• CB750C (1980‑82) Custom
• CB750L (1979) Limited

• Honda CB900C (1980‑82) Custom
• CB900F (1981‑82) Supersport
• CB1000C (1983) Custom
• CB1100F (1983) Supersport

Part Number: 18-7059

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Check the listed model and year, then read any fitment notes in the description.

Make Model Year
Honda CB750K Standard 1979
Honda CB750F Supersport 1979
Honda CB750L Limited 1979
Honda CB750K 1980
Honda CB750F 1980
Honda CB750C Custom 1980
Honda CB750K 1981
Honda CB750F 1981
Honda CB750C 1981
Honda CB750K 1982
Honda CB750F 1982
Honda CB750C 1982
Honda CB900C Custom 1980
Honda CB900C 1981
Honda CB900F Supersport 1981
Honda CB900C 1982
Honda CB900F 1982
Honda CB1000C Custom 1983
Honda CB1100F Supersport 1983

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

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60-day returns on eligible parts

No restocking fees. Eligible parts must be unused, uninstalled, unaltered and complete. The 60-day window starts when your order is delivered.

Electrical parts are excluded from standard returns. Check return eligibility.

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Other shipping options

Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.

Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.

Frequently Asked Questions

What part of the DOHC Honda CB engine does gasket 18-7059 seal?

It is the rubber O-ring for the spark-advancer cover on the listed CB750, CB900, CB1000C and CB1100F engines.

Which Honda gasket number does 18-7059 replace?

The spark-advancer cover O-ring cross-references Honda OEM 30372-425-000.

How many spark-advancer cover gaskets are included and used?

One gasket is included and one is used on each compatible engine.

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