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.
1981 Honda CB900C Custom · Engine Gaskets & Seals Buying guide
On the 1981 Custom, an oil trace at the head cover and a leak around the shift shaft call for different inspections. Locate the first wet point before choosing a gasket package. The separate dual-range gearbox also makes the precise leaking joint important.
Valve-cover gasketReplacement for the DOHC valve cover, reference 12391-425-010.Voir la pièce
Shift-shaft sealJapanese-made 12.5 × 25 × 8 oil seal; reference 91204-425-003.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
Pièces connexes : Four sleeve O-rings
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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