Stage6 R/T Crankshaft Bearings (Polymer Cage) + Oil Seals – Derbi

High-performance crankshaft bearing and oil seal kit from Stage6 R/T, designed for demanding racing setups on Derbi Euro 2 / 3 / 4 engines.

This kit combines premium SKF bearings with advanced FKM (Viton) oil seals, offering reduced friction, improved efficiency, and increased durability under high RPM conditions.

The polymer (plastic) cage bearings are specifically developed for racing use. Compared to metal cages, they provide greater elasticity and lower friction, allowing smoother engine rotation and improved performance. However, they require proper setup and should not be exposed to continuous temperatures above 120°C.

Important: Polymer cage bearings should only be used on engines without a catalytic converter.

The included orange FKM oil seals are highly resistant to heat, fuel, and wear, ensuring long service life and optimal sealing.

• High-end SKF crankshaft bearings
• Polymer cage for reduced friction and racing performance
• FKM (Viton) oil seals for superior durability
• Designed for high-revving engines (up to 20,000 RPM)

Technical details :

• Bearings : 2x SKF 6204 TN9-C3
• Size : 20 × 47 × 14 mm
• Oil seals : 2x 20 × 35 × 7 mm