Wiseco Pistons BK5003 Wiseco BK5003 Main Bearing Kit - (2) 30 X 72x 19mm Bk5003

The Wiseco BK5003 Main Bearing Kit includes two precision crankshaft roller bearings measuring 30 x 72 x 19mm, engineered for high-performance powersports engine rebuilds. Designed to complement Wiseco's complete line of bottom-end components, this kit delivers reliable crankshaft support across a wide range of motorcycle, ATV, and off-road applications.

Key Features:

• Bearing dimensions: 30mm bore x 72mm outer diameter x 19mm width (per bearing)
• Quantity: Sold as a pair (2 bearings included)
• Bearing type: Roller bearing
• Case-hardened construction for maximum service life and smooth operation at high RPM
• Manufactured by OEM-grade suppliers, including leading Japanese manufacturers, and inspected for accuracy, function, and cleanliness
• Engineered to meet or exceed OEM specifications
• Compatible with Wiseco crankshaft assemblies for precise fitment

Wiseco main bearing kits are sourced from premium suppliers and held to strict quality standards, making them an ideal choice for complete engine rebuilds or routine bottom-end maintenance on powersports engines. Each bearing is precision-finished to restore factory-level crankshaft performance and protect the engine under demanding operating conditions.