Cylinder Barrel Kit Piston Honda CB125 S CB125 J CT125 C 1975–1984
New aftermarket cylinder barrel and piston replacement kit for compatible Honda CB125 S, CB125 J and selected CT125 C applications. Suitable for repairing a worn or damaged cylinder and rebuilding the top end of a matching engine.
What’s Included
- 1 x cylinder barrel
- 1 x piston
- Gaskets supplied with the kit
Important: Please confirm the actual kit contents against the product photographs and packaging before publication. Piston rings, gudgeon pin and circlips have not been independently confirmed for this item.
Intended Applications
- Honda CB125 S – selected models around 1975–1984
- Honda CB125 J – selected models around 1975–1984
- Honda CT125 C – only where dimensions and original part design match
Listed years are indicative, not a guarantee of fitment to every motorcycle in the range.
Important Fitment Information
Honda changed CB125 engine and cylinder specifications during this period. Some earlier 1975 engines use a different bore from later engines, and CT125 variations also require checking.
Before ordering, compare your original cylinder and piston with this kit. Check the bore size, piston-pin diameter, cylinder height, stud spacing, crankcase spigot, gasket shapes and oil passages, as well as the exact motorcycle model and year.
Do not order solely on the basis of the engine capacity or registration year. Contact us with your existing part measurements if uncertain.
Ideal For
- Top-end engine rebuilds
- Replacing a worn or damaged cylinder barrel
- Replacing a worn piston
- Classic Honda 125 restoration and refurbishment
Condition
New aftermarket replacement parts. Not represented as Genuine Honda components.
Installation
Correct cylinder and piston sizing, lubrication, piston-ring installation and engine timing are essential. Installation by a competent motorcycle mechanic is recommended.