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Honda CB500 CB450 CB400 CB360 CB350 cylinder head gasket 12909-428-003
Cylinder head sealing gasket parts fiche diagram, SKU 73-1186, highlighted reference 4
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB500 CB450 CB400 CB360 CB350 cylinder head gasket 12909-428-003

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Load image into Gallery viewer, Honda CB500 CB450 CB400 CB360 CB350 cylinder head gasket 12909-428-003
Load image into Gallery viewer, Cylinder head sealing gasket parts fiche diagram, SKU 73-1186, highlighted reference 4

Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003

73-1186
$2.95 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
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts
Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003
$2.95 USD
Description

Restore top-end sealing performance with this high-quality Cylinder Head Gasket. Designed to match OEM specifications, this gasket ensures a perfect fit and proper sealing in your classic Honda twin or four-cylinder engine. A must-have when rebuilding or performing head service on your vintage ride.

Key Features
• Replaces OEM# 12909-428-003 / 12909-283-000 / 12909-333-000
• Durable and heat-resistant materials for long life
• Engineered to OEM specs for precise fit
• Our Part Number: 73‑1186

Fitment / Compatibility
• CB400F (1975–77)
• CB350F (1972, 1974)
• CB500T (1975–76) Twin
• CB450K (1966/1968-74)
• CL450K (1967/1969-74)
• CB360T (1975–76)
• CB360G (1974)
• CB360K0 (1974)
• CL360K (1974-75)

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

Make Model Year
Honda CB400F 1975
Honda CB400F 1976
Honda CB400F 1977
Honda CB350F0 1972
Honda CB350F1 1974
Honda CB500T Twin 1975
Honda CB500T Twin 1976
Honda CB450K0 1966
Honda CB450K1 1968
Honda CB450K2 1969
Honda CB450K3 1970
Honda CB450K4 1971
Honda CB450K5 1972
Honda CB450K6 1973
Honda CB450K7 1974
Honda CL450K0 1967
Honda CL450K2 1969
Honda CL450K3 1970
Honda CL450K4 1971
Honda CL450K5 1972
Honda CL450K6 1974
Honda CB360T 1975
Honda CB360T 1976
Honda CB360G 1974
Honda CB360K0 1974
Honda CL360K0 1974
Honda CL360K1 1975

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

Is Honda OEM 12909-428-003 a complete cylinder-head gasket?

No. Honda OEM 12909-428-003 is a small cylinder-head stud sealing rubber, not the large combustion-chamber head gasket. One stud seal is included.

What should be checked when replacing head-stud seal 12909-428-003?

Inspect the stud, sealing recess and nearby oil path for damage or hardened rubber. Install the seal in the documented orientation and follow the Honda head-fastener sequence and torque procedure.

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