PROX Crankshaft Bearing and Seal Kit (Manufacturer part number: 23.CBS20018) — a set of replacement parts designed for crankshaft maintenance on off-road machines. This kit includes the bearings and seals necessary to replace worn components and restore proper sealing for engine operation.

Ideal for the workshop or track preparation, this PROX kit allows for intervention on the engine's rotating assembly (crankshaft, crankpins, bearing surfaces) by replacing the sealing and support elements that control friction and play. When installed correctly, it helps minimize the risk of oil leaks and restores the proper behavior of the crankshaft during refurbishment.

• Contents: bearings + crankshaft seals (complete kit)
• Usage: replacement during engine maintenance or refurbishment
• Field: Cross — designed for the needs of off-road motorcycles

Suitable for interventions on many cross models — check the part number and compatibility with your machine before ordering (for example, YZ85 / YZ65 series). Install following manufacturer recommendations and check installation tolerances to ensure durable crankshaft operation.