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1980 Honda CB650C Custom Valves & Stem Seals

Intake and exhaust valves for the 1980 CB650C have different references and jobs. Decide which positions need attention after inspection, then choose the correct valve and stem-seal package. The Kibblewhite option supplies eight seals rather than an unspecified engine quantity.

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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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1980 Honda CB650C Custom · Valves & Stem Seals Buying guide

Match each valve to its cylinder-head position

The intake valve uses reference 14711-426-003 and the exhaust valve 14721-426-003. The eight-piece Viton stem-seal set is a separate sealing choice, not a set of replacement valves.

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 Viton seal setEight valve stem seals made from 100% Viton, replacing reference 12209-333-005.View part

Keep intake and exhaust parts separate

Both featured valves are Japanese-made replacements for the listed CB650 application, but their references are different. Keep removed parts identified by position and have the cylinder head evaluated before deciding whether valves alone address the wear. Each valve is sold individually; four intake valves and four exhaust valves replace all eight positions.

Choose seal material and package deliberately

The Kibblewhite set contains eight 100% Viton stem seals and is listed against reference 12209-333-005. Select the package by confirmed contents and the work being done; do not add another seal set automatically when buying a broader repair package.

Valves & Stem Seals questions

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.

How many seals are in the Kibblewhite set?

Eight valve stem seals. The listed material is 100% Viton. Count this confirmed package quantity when checking whether your cylinder-head order duplicates another set.

Will new valves or stem seals correct worn valve 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.

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

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