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1981 Honda CB650 Valves & Stem Seals

Keep intake and exhaust valves separate when planning cylinder-head work on your 1981 Honda CB650. The two valves have different references, and stem seals are another item to count. Base the order on head inspection rather than symptoms alone.

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Honda CB650 CB650C CB650SC exhaust valve 14721-426-003

1979-82 Honda CB650 / CB650C / CB650SC Exhaust Valve ~ Replaces 14721-426-003

$24.95 USD
73-0980
Replace your exhaust valve with this Exhaust Valve, replacing OEM #14721-426-003. Made in Japan.Key Features• Exhaust valve• Replaces OEM #14721-426-003• Made in Japan• Honda...
Honda CB650 CB650C CB650SC intake valve 14711-426-003

1979-82 Honda CB650 / CB650C / CB650SC Intake Valve ~ Replaces 14711-426-003

$17.57 USD
73-0979
Replace your intake valve with this Intake Valve, replacing OEM #14711-426-003. Made in Japan.Key Features• Intake valve• Replaces OEM #14711-426-003• Made in Japan• Honda...
Honda CB650 CB550 CB500 CB400 CB350 valve stem seals 12209-333-005

Honda CB Valve Stem Seals ~ Replaces 12209-333-005

$2.95 USD
73-0871
Replace your valve stem seals with this Valve Stem Seal, replacing OEM #12209-333-005.Sold each, order the quantity you require.Key Features• Valve stem seal• Replaces...
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Honda CB650 CB550 performance kibblewhite valve stem seal set 12209-333-005

Honda CB High Performance Kibblewhite Valve Stem Seal Set ~ Replaces 12209-333-005

$49.95 USD
12-0083
Fit premium Viton valve stem seals with this Kibblewhite 100% Viton Valve Stem Seal Set of 8, replacing OEM #12209-333-005. Made in the USA....
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1981 Honda CB650 · Valves & Stem Seals Buying guide

Choose valves by position and condition

Both replacement valve types are made in Japan. The featured Kibblewhite seals come as an eight-piece Viton set; the standard replacement seal is sold individually, allowing its quantity to match a smaller repair.

Parts to consider

1979-82 Honda CB650 / CB650C / CB650SC Intake Valve ~ Replaces 14711-426-003 Intake valveOne Japanese-made intake valve replacing reference 14711-426-003.View part 1979-82 Honda CB650 / CB650C / CB650SC Exhaust Valve ~ Replaces 14721-426-003 Exhaust valveOne Japanese-made exhaust valve replacing reference 14721-426-003.View part Honda CB High Performance Kibblewhite Valve Stem Seal Set ~ Replaces 12209-333-005 Kibblewhite valve sealsEight 100% Viton valve stem seals; made in the USA.View part

Related parts: Individual valve stem seal

Keep intake and exhaust references separate

The intake valve replaces 14711-426-003; the exhaust valve replaces 14721-426-003. Record the position as well as the reference when comparing removed valves. Their shared CB650 application is not a reason to treat the two valves as interchangeable. Each valve is sold individually; four intake valves and four exhaust valves replace all eight positions.

Choose the seal package deliberately

The Kibblewhite package contains eight 100% Viton seals. The linked standard seal is sold each despite wording in its URL. Count the seals required by the inspected cylinder head and use the current product description for ordering quantity.

Ordering questions

Are the featured valves a complete set?

No. One intake valve or one exhaust valve is supplied per respective listing. Four of each replace all eight valve positions. Use inspection of the head, valves and guides to decide how many actually need replacement.

What else should be checked when a valve is replaced?

Inspect the valve seat, spring, retainer and keepers; for an exhaust valve, also check installed height. Have the seat machined as needed, then set cam timing and valve clearance to Honda specifications after assembly.

Can new seals compensate for worn guides?

Measure valve-stem-to-guide clearance and have excessive guide wear corrected. New valves or stem seals do not establish that the guides are serviceable.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

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