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Honda CB900C CB900F NGK D9EA spark plug
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB900C CB900F NGK D9EA spark plug

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1980-81 Honda CB900C / CB900F NGK D9EA Spark Plug

50-8603
$7.87 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
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts
1980-81 Honda CB900C / CB900F NGK D9EA Spark Plug
$7.87 USD
Description

Replace your spark plugs with these NGK D9EA Spark Plugs.

Key Features
• NGK D9EA spark plug

Fitment / Compatibility
• Honda CB900C (1980‑81) Custom
• CB900F (1981) Supersport

Part Number: 50-8603

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

Make Model Year
Honda CB900C Custom 1980
Honda CB900C 1981
Honda CB900F Supersport 1981

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.

See full shipping details

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.

Start your return below. Wait for our instructions before mailing a part back.

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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

How many NGK D9EA spark plugs are included and needed?

One NGK D9EA is included. Every compatible Honda model named here has a four-cylinder engine, so four plugs are needed for a complete engine-wide replacement.

What type of spark plug is the NGK D9EA?

NGK D9EA is a conventional non-resistor spark plug. Match the complete NGK code, because the resistor designation, heat range and suffix are part of the plug specification.

Can a different NGK heat range or similar D-series plug be substituted?

Do not substitute solely because the threads look alike. Use NGK D9EA only for the 1980-1981 CB900C and 1981 CB900F, or follow the Honda service information and NGK guidance for a verified alternative.

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