Yamaha Metal, Crank (-0.4) - YF1-52612-39-20. Precision Engine Component for Optimal Crankshaft Performance. Maintain peak engine performance with the Yamaha - METAL, CRANK (-0.4) - YF1-52612-39-20, a genuine Yamaha crankshaft bearing designed for engines requiring a -0.4 mm undersize. This crank bearing ensures the correct oil clearance, supporting proper lubrication and smooth crankshaft rotation during high-stress marine operation.. Crafted to Yamaha's OEM standards, this component delivers t