Pièces pour motos Honda
Choisissez votre modèle et l’année pour voir les pièces répertoriées pour votre moto.
Choisissez votre modèle et l’année pour voir les pièces répertoriées pour votre moto.
1980 Honda CB900C Custom · Gaskets & Oil Seals Buying guide
Oil can travel across a cover before it drips. Clean the area and identify the first wet joint, then distinguish the head-cover gasket, head or base gasket, and the seal around a moving shaft. Their repair scope is very different on the CB900C.
Valve-cover gasketReplacement for the DOHC valve cover, reference 12391-425-010.Voir la pièce
Athena top-end gasket setHead, base and valve-cover gaskets, four headpipe gaskets, camshaft-holder seal, four sleeve O-rings and additional O-rings.Voir la pièce
Shift-shaft sealJapanese-made 12.5 × 25 × 8 oil seal; reference 91204-425-003.Voir la pièce
Pièces connexes : Clutch-cover gasket · Cylinder-sleeve O-ring set
The head-cover gasket is disturbed for valve-clearance service. Honda specifies checking it for damage and applying sealant only at the locations shown in the cover procedure. Removing the cylinder head or block is a larger, engine-out job with head, base and other seals to account for; the top-end set does not promise every engine oil seal.
The shift-shaft seal is listed as 12.5 × 25 × 8mm. Check that exact position and the shaft’s sealing surface before fitting a replacement. A new seal cannot correct a damaged shaft or a distorted cover. Keep cylinder-sleeve O-rings separate from valve-stem seals and account for any pieces already included in a gasket set.
Follow Honda’s head-cover diagram. It identifies particular sealing points rather than a full coating. Inspect the gasket and cover first; extra sealant or excessive tightening is not a repair for damaged rubber or a distorted sealing face.
First trace the oil to its source. If it starts at the shift shaft, inspect that shaft and its individual seal. A head or base gasket set serves different joints and will not repair a shaft-seal leak.
List every joint the planned work will open and compare the itemized contents. The Athena set includes head, base and head-cover gaskets, exhaust gaskets and selected seals. Buy separate parts for uncovered joints or a limited repair, without duplicating included sleeve O-rings.
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