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1982 Honda CB650SC Nighthawk — Soupapes et composants de distribution

Cylinder-head work on the 1982 CB650SC calls for separate intake, exhaust and stem-seal decisions. Identify the positions needing repair after inspection of the head. The two valve references differ, while the eight-piece Viton set is a sealing package rather than a set of replacement valves.

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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...
Épuisé
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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1982 Honda CB650SC Nighthawk · Valves & Stem Seals Buying guide

Choose valves by position and seals by confirmed contents

The intake reference is 14711-426-003 and the exhaust reference 14721-426-003. The Kibblewhite set supplies eight 100% Viton seals. Use those facts with the actual condition of the guides, seats and stems when planning the order.

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.Voir la pièce 1979-82 Honda CB650 / CB650C / CB650SC Exhaust Valve ~ Replaces 14721-426-003 Exhaust valveOne Japanese-made replacement exhaust valve, reference 14721-426-003.Voir la pièce Honda CB High Performance Kibblewhite Valve Stem Seal Set ~ Replaces 12209-333-005 Eight Viton stem sealsKibblewhite set of eight 100% Viton valve stem seals, reference 12209-333-005.Voir la pièce

Identify the correct valve before buying

Both Japanese-made replacement valves have explicit 1982 CB650SC application, but their references and positions are different. Compare the required part with the dismantled head. Use the appropriate service limits rather than inferring that a new valve alone repairs every worn guide or seat. Each valve is sold individually; four intake valves and four exhaust valves replace all eight positions.

Use the verified seal package size

The Kibblewhite set contains eight Viton stem seals against reference 12209-333-005. Check whether another package already supplies the seals needed for the repair. Do not rely on an old product handle or a broad model-family description to infer a different quantity.

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.

What material is specified for the seal set?

The eight-piece Kibblewhite package is described as 100% Viton. Select it on the confirmed material, application and contents without assuming an unverified performance improvement.

Should valve guides be checked before ordering seals?

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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