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1979 Honda CB650 Valves & Stem Seals

Keep intake and exhaust valve positions distinct when planning cylinder-head work on a 1979 CB650. Replacement valves have different references, while valve-stem seals are offered individually or as an eight-piece Viton set. Match the order to the measured head.

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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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1979 Honda CB650 · Valves & Stem Seals Buying guide

Separate valve replacement from stem sealing

Valve condition, guide condition and stem sealing are related inspection points, but they do not call for the same part. Use the head assessment to decide which pieces need replacement.

Parts to consider

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

Related parts: Individual valve-stem seal

Use the correct valve reference

The intake valve replaces 14711-426-003; the exhaust valve replaces 14721-426-003. Both are listed for this CB650 application. Avoid choosing by appearance alone, especially when the removed parts or cylinder head may have been changed. Each valve is sold individually; four intake valves and four exhaust valves replace all eight positions.

Choose a seal package deliberately

The Kibblewhite package contains eight Viton stem seals. The separate standard seal is sold individually. Count the positions included in the repair and choose the required quantity of individual seals or the eight-piece package.

Buying 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 come in the Viton set?

Eight seals are included. The separately linked standard seal is sold individually, so its required order quantity must be entered separately.

Will new stem seals fix 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.

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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