Keeway Strike 125 K157FMI 57mm Cylinder & Piston Kit
Brand-new unbranded standard 57 mm top-end rebuild kit for compatible Keeway Strike 125 motorcycles using the K157FMI GS-style engine.
Key Specifications
- Standard bore: 57 mm
- Engine family: K157FMI / 157FMI GS-style
- Stroke reference: 48.8 mm where documented
- Piston-pin reference: 14 mm
- Air-cooled single-cylinder 4-stroke application
- EGR / secondary-air-system style cylinder family
- Condition: Brand new
- Type: Unbranded aftermarket replacement
What's Included
- 1 x cylinder barrel
- 1 x piston
- 1 x piston ring set
- Head and base gaskets
Vehicle Compatibility
| Model | Years / Variant | Notes |
|---|---|---|
| Strike 125 | 2013–2014 documented | K157FMI; OEM cylinder 139013210030, piston 179133090003, EGR/exhaust-gas pipe |
Important Fitment Information
The Keeway Strike 125 is directly catalogued with K157FMI engine parts. Its OEM cylinder catalogue shows cylinder 139013210030 with an exhaust-gas/EGR pipe, and it uses piston 179133090003. Compare the stocked kit to the original before fitting.
Do not order by 125cc capacity alone. Compare bore, piston-pin diameter, piston crown, cylinder height, stud spacing, gasket profile, oil passages and EGR/secondary-air ports with the original top end.
Installation
Correct piston-ring orientation, piston direction, valve timing, gasket installation and cylinder-head torque are essential. Professional installation is recommended where the correct engine-building procedure is not known.