Honda CB125S 1976-1985 Cylinder Barrel Piston Kit 56.5mm
Brand new aftermarket standard-bore cylinder barrel and piston top-end rebuild kit for Honda CB125S 1976-1985.
Direct Fitment
- Honda CB125S - 1976-1985
Kit Specification
- Engine capacity: approximately 124cc
- Standard bore: 56.5 mm
- Piston pin diameter: 15 mm
- Piston pin length: approximately 48 mm
- Type: standard-bore top-end replacement kit
- SKU: 01687-ENG
Kit Contents
- 1 x cylinder barrel
- 1 x piston
- 1 x piston ring set
- 1 x piston / gudgeon pin
- 2 x piston circlips
- Top-end gaskets / seals as supplied
Reference Part Numbers
- Cylinder: 12100-383-030
- Cylinder base gasket: 12191-330-306
- Cylinder head gasket: 12251-437-P00
- Piston: 13101-383-030
- Piston pin: 13111-440-000
- Standard piston ring set: 13011-383-621
- Piston circlip: 94601-15000
Direct Replacement
This kit is catalogued as a direct standard-bore replacement for the Honda CB125S model/year range shown above. It uses the later 56.5 mm bore specification and the matching 15 mm piston pin.
Important Fitment Check
Before ordering, compare the cylinder casting, bore size, piston pin diameter, stud spacing, cylinder height, crankcase spigot, gasket profile and oil passages with the parts removed from your engine.
Classic Honda 125 specifications can vary by market and engine serial number. Do not order solely from the registration year if the engine has previously been replaced or modified.
Ideal For
- Replacing a worn or damaged cylinder barrel
- Replacing a worn piston or rings
- Restoring compression
- Top-end engine rebuilds
- Classic Honda restoration
Condition
Brand New aftermarket replacement components. Not represented as genuine Honda parts.
Installation
Correct piston orientation, ring installation, lubrication, valve timing and fastener torque are essential. Installation by a competent motorcycle mechanic is recommended.