Premium Polini crankshaft bearings and oil seals engineered for Minarelli-based scooters including Yamaha Aerox and BW's.

Built for high-performance racing applications while serving as reliable replacements for stock engines. Seals feature Viton construction with superior thermal and chemical resistance, polymer-coated lips for reduced friction and extended durability.

Set includes :

• Two NTN C4 steel cage crankshaft bearings (6204, 20x47x14mm) 
• Two precision oil seals (20x30/34x6mm and 20x42/43x8mm).