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This is an authentic vintage Honda OEM Cylinder Head Breather Inspection Cover, part number 12321-300-305. Made from durable cast aluminum, it seals the cylinder head breather area to help prevent oil leaks while allowing service access. The cover features an asymmetric sloped design, two offset mounting points, and factory casting or maker codes such as 440 or HM622. Finished in semi-gloss black, it is ideal for period-correct restoration of classic Honda SOHC 750cc inline-four motorcycles. Compatible Models * Honda CB750K Four K1-K8: 1971-1978 * Honda CB750F Super Sport: 1975-1978 * Honda CB750A Hondamatic: 1976-1978 Note: Early 1969-1970 K0 models may share a similar design, but those versions were generally supplied with a raw or polished aluminum finish.
Please verify compatibility with your specific motorcycle model before purchasing.
Cleaning Status
partially_cleaned
Cleaning Notes
Used stain remover
Worldwide shipping available
Express shipping available at checkout
Estimated delivery: 2-5 business days
All items are carefully packaged for safe transit
Items can be insured — contact us for more information
30-day return policy on most items
Items must be in original condition and packaging
Contact support for return authorization
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Yes, all parts with OEM numbers are genuine manufacturer parts. Check the specifications tab for the OEM number.
We offer a 30-day return policy. Items must be in original condition. See the Shipping tab for complete details.
Yes, we ship to most countries worldwide. Shipping costs and delivery times vary by location.
Parts are sold separately. We recommend professional installation for safety and warranty purposes.
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