S3 Cylinder Piston Kit for GasGas & Rieju 250cc Bikes (1996–2025)
Premium S3 Cylinder Piston Kit for GasGas and Rieju 250cc bikes. Includes forged piston with MOS2 coating, alloy nicasil racing cylinder, gaskets, O-rings, and needle bearing. Made in Spain for durable, precise performance.
| Brand: S3 |
| Engine Displacement: 250 cc |
| Hardparts: RIEJU |
Internal Reference:
S3-YKE-GG-EC250
Product Information
Upgrade or rebuild your 250cc GasGas or Rieju with the S3 Cylinder Piston Kit, designed for racing and high-performance use. This complete top-end kit includes everything needed for a precise, long-lasting installation:
- Forged piston with MOS2 coating – reduces friction and improves longevity.
- Alloy nicasil racing cylinder – made in Spain with diamond stone honing for smoother operation and better heat management.
- Premium gasket and O-ring set – ensures airtight seal and reliable performance.
- Needle bearing for piston – supports smooth piston movement under extreme conditions.
Every component is manufactured by S3 in Spain, using premium materials and precision engineering to maintain high performance and reliability. Ideal for riders looking to restore or upgrade their GasGas EC 250 or Rieju MR 250 top-end.
Includes
- S3 GasGas Racing factory cylinder
- Complete piston set
- Gasket and O-rings set
- Needle bearing for piston
Fitment
GASGAS
- EC 250 (1996–2018)
RIEJU
- MR 250 (2019–current)
- MR PRO 250 (2019–current)
- MR RACING 250 (2019–current)
