Yamaha - Drive Sprocket Drivetrain Component 93852-12018-00. Overview. You don't always notice a sprocket going bad right away, but once it starts slipping or getting noisy, it's hard to ignore. I've replaced quite a few where the wear wasn't obvious until the drivetrain was under load. The Yamaha Drive Sprocket 93852-12018-00 helps bring things back to smooth, consistent operation. It's one of those parts that keeps your machine feeling tight and responsive.. Key Features. • Consistent Chain Engagement - Provides smooth contact with the chain for reliable power transfer.. • Yamaha Engineered Fit - Built to match factory alignment and mounting specifications.. • Supports Drivetrain Performance - Helps maintain efficient operation and reduce uneven wear.. • Durable Metal Construction - Designed to handle load, friction, and continuous use.. • Direct Replacement Component - Installs easily with standard tools and hardware.. Engine & Boat Compatibility. The Yamaha Drive Sprocket 93852-120