Prox with crankshaft seals Crankshaft bearingRef : PRO00163A / 1117597

PROX Crankshaft Bearing and Seal Kit - Manufacturer's ref: 23.CBS23001

Designed for the refurbishment of crankshafts in motocross machines, this PROX kit includes the bearings and seals necessary to replace worn components during a rebuild. Ideal for maintenance operations on YZ250 and 250 cm³ machines, it is aimed at riders and mechanics who want to start with a solid base before reassembling the engine.

• Contents: crankshaft bearings + seals (complete kit)
• Treated bearings to reduce friction and improve rotational smoothness
• Seals designed to ensure tightness around the crankshaft
• Suitable for motocross use and the demands of modern 2-stroke engines

Regular installation and inspection of the crankshaft are recommended to ensure the longevity of the components. This PROX kit is a practical solution for replacing sealing and bearing parts all at once during an engine overhaul.

• Main compatibilities: YAMAHA YZ 250 (2026), FANTIC XX 250 (2026), YAMAHA YZ 250 (CG23) (2023)