A localized oil leak and a stripped engine need different sealing orders. For the 1982 standard CB650, begin with the exact joint, gasket outline and engine identity. Check individual pieces against the work planned before choosing a broader gasket set.
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Replace your cylinder sleeve O-rings with this Cylinder Sleeve O-Ring Set of 4, replacing OEM #91304-286-000.Key Features• Cylinder sleeve O-rings, 4 per set• Replaces...
Replace your CB650 cylinder head gasket with this Cylinder Head Gasket, replacing OEM #12251-426-306.Key Features• Cylinder head gasket• Replaces OEM #12251-426-306Fitment / Compatibility• All...
Rebuild your CB650 engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
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Replace your CB650 or CB500/CB550 cylinder base gasket with this Cylinder Base Gasket, replacing OEM #12191-426-306.Key Features• Cylinder base gasket• Replaces OEM #12191-426-306Fitment /...
Valve-cover and cylinder-head gaskets are clearly identified individual choices. Separate oil seals require their own size and position checks; an engine-wide kit should be checked against the full repair list.
The valve-cover gasket carries reference 12391-460-770; the cylinder-head gasket uses 12251-426-306. Identifying the leaking or disturbed joint avoids opening a larger kit solely to obtain one piece. Compare the actual cover or cylinder assembly if the engine has been changed.
Check the full repair list
An overhaul gasket set and an oil-seal kit serve different purchasing needs. Before a complete rebuild, confirm the current kit contents against every opened joint and removed seal. Do not assume that rubber seals, valve-stem seals or cover hardware accompany every gasket set.
Buying questions
How do I distinguish the valve-cover joint from the head-gasket joint?
The valve-cover gasket seals the removable top cover. The head gasket seals between the cylinder head and cylinder block. Locate the leaking joint before choosing a gasket; the two parts serve different positions.
Can I choose a crank seal from the model name alone?
Match the specific seal position, dimensions and reference. Some engines use different crank seals at separate locations, so a broad application list is insufficient to choose a side.
What if I only need a cylinder-head gasket?
Use the individual head-gasket option after confirming the engine application. You do not need to choose an overhaul set merely because other engine work may be done later.
Not sure which part you need?
Send your model and year, plus photos of your existing part and any changes to the original setup.