90105-ZV4-650 Bolt (8x8) - Overview. The 90105-ZV4-650 Bolt (8x8) is a specialized fastener used within Honda marine engine systems. It supports the oil check system, playing a crucial role in securing components to ensure reliable engine operation. Precision-engineered to match factory specifications and tolerances, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda bolt crafted to meet exact material and dimensi