King Engine Bearings MB5731XP0.5 Main Bearing Set for Suzuki G13A G13B G13BA G13BB +0.50mm Oversize

The King Engine Bearings MB5731XP0.5 is a complete main bearing set designed for Suzuki G13-series engines, including the G13A (1324cc), G13B (1298cc DOHC), G13BA (1298cc SOHC 2-valve), and G13BB (1298cc SOHC 4-valve). This set is supplied in a +0.50mm oversize dimension, intended for use with reground or reconditioned crankshafts that have been machined to the corresponding undersize journal specification.

This bearing set is part of King's XP Racing Series, featuring the proprietary pMaxBlack™ overlay — a tri-metal, lead-bronze layered construction with a nano-scaled hardening process that delivers superior load capacity, withstanding up to 10,200 PSI of bearing load. The advanced overlay provides exceptional durability and wear resistance across a wide range of performance and racing applications.

Key Features:

• pMaxBlack™ tri-metal construction — lead-bronze backing with nano-hardened Babbitt overlay
• +0.50mm oversize for use with 0.50mm undersize reground crankshafts
• Rated to 10,200 PSI load capacity for demanding race and street applications
• 90° oil groove geometry maintains consistent oil flow and expands effective bearing surface area
• Optimized crush height and eccentricity values derived from elasto-hydrodynamic analysis
• Industry-leading wall thickness tolerances for minimal shell-to-shell variation
• Suitable for circle track, drag racing, off-shore racing, and high-performance street use
• Compatible with steel crankshafts
• Set includes 5 pairs of main bearing shells

King Engine Bearings has been a trusted manufacturer and OEM partner since 1960, supplying precision bearings for automotive, racing, marine, and aviation applications worldwide. The MB5731XP0.5 is the ideal choice for builders seeking race-proven reliability and performance in a Suzuki G13-series engine build.