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  • 1978 Honda CB750A / CB750K Genuine Honda Exhaust Valve ~ OEM 14721-300-015
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Honda CB750A CB750K Honda exhaust valve 14721-300-015
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60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB750A CB750K Honda exhaust valve 14721-300-015

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1978 Honda CB750A / CB750K Genuine Honda Exhaust Valve ~ OEM 14721-300-015

99-5441
$89.95 USD

Sold individually

In stock Usually ships the same or next business day
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,330 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
Browse all parts
1978 Honda CB750A / CB750K Genuine Honda Exhaust Valve ~ OEM 14721-300-015
$89.95 USD
Description

Upgrade or restore your classic Honda motorcycle with this Genuine Honda Exhaust Valve — precision‑engineered and made in Japan. This authentic OEM part #14721‑300‑015 is a brand new, unused Honda exhaust valve that may show age spots from long‑term storage but is otherwise ready for installation.

Sold per valve (as shown in photo). Order the quantity you require.

Whether you’re replacing worn components or completing a full engine rebuild, trust genuine Honda parts for durability and correct fitment from the factory.

Key Features
• Genuine Honda OEM part — replaces 14721‑300‑015
• Quality exhaust valve for proper engine performance
• Brand new unused Honda component
• May show age spots from storage but functionally new
• Made in Japan to original Honda specifications
• Our Part Number: 99‑5460

Fitment / Compatibility
• CB750K (1978)
• CB750A (1978) Hondamatic

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

Make Model Year
Honda CB750K 1978
Honda CB750A 1978

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 Honda 14721-300-015 exhaust valves are included and required?

One genuine Honda exhaust valve, OEM 14721-300-015, is included. The supported SOHC CB750 engine uses four exhaust valves, so four are required to replace every exhaust valve.

What cylinder-head work should accompany a new CB750 exhaust valve?

Measure valve-stem-to-guide clearance, inspect or machine the seat as required, and check the spring, installed height and valve clearance to Honda specifications. A new valve will not correct a worn guide or damaged seat.

Can an unused genuine Honda 14721-300-015 valve show storage marks?

Yes. This is a new, unused made-in-Japan valve, although minor age spots may be present from long-term storage.

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