This manual covers the Yamaha Ovation CS340 snowmobile, produced across various model years from 1989 to 1999. The Ovation series was designed as a capable recreational snowmobile, offering a balance of performance and comfort for trail riding. Known for Yamaha's reputation in motorsports, these machines feature a two-stroke, liquid-cooled, twin-cylinder engine with a displacement of 337cc, dual Mikuni carburetors, and a CDI ignition system. The transmission is an automatic Continuously Variable Transmission (CVT) with Yamaha's Anti-Chain-Slippage system. The Ovation CS340 is equipped with essential safety features such as an emergency kill switch with a wrist tether and standard lighting. This comprehensive factory service manual provides detailed information essential for the maintenance and repair of your Yamaha Ovation CS340. It covers all major mechanical, electrical, and chassis systems, including the engine, fuel system, transmission, suspension, steering, and braking systems. Within its pages, you will find routine maintenance procedures, in-depth engine and transmission repair instructions, electrical troubleshooting guides, and specific diagnostic and rebuild procedures. This manual is an indispensable resource for owners, independent repair shops, and service technicians seeking accurate, factory-level information to ensure the longevity and optimal performance of their snowmobile.