Product Description: 8-piece engine bearing set for motorcycle.Compatible with ZXR400, ZXR400R 1989–1994.STD crankshaft bearing. Specifications: - Quantity: 8 pieces/set (8 connecting rod bearings required per motorcycle). - Material: AL. - Position: Connecting rod. - Crankshaft pin diameter: 30 mm (refer to product image). Compatibility: - Fits STD crankshaft without abrasions. - Not suitable for worn crankshafts (requires machining to specified bearing size). Installation: - Clean connecting rod and crankshaft before installation. - proper fitment before purchase. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.