Yamaha Bolt, Joint - 6K8-42316-00-00. Durable and Reliable Yamaha Joint Bolt for Secure Engine Assemblies. The Yamaha Bolt, Joint - 6K8-42316-00-00 is a high-quality OEM replacement part designed for secure engine assemblies and reliable performance. This bolt is built to handle high-stress mechanical applications, ensuring that critical components of your Yamaha engine remain tightly fastened. With its superior strength and durability, this bolt is essential for maintaining the integrity of you