90519-ZVP-000 Gear Shim B - Overview. The 90519-ZVP-000 Gear Shim B is a precision-engineered component designed for Honda marine engine systems. This genuine OEM part plays a critical role in the transmission system by adjusting spacing and alignment of gears, ensuring smooth mechanical motion and optimal performance. Fabricated to strict factory specifications, it guarantees seamless integration with existing gears and hardware, thereby maintaining peak engine reliability and durability.. Key