This comprehensive 1985 Yamaha BR250 Snowmobile Factory Service Manual provides detailed information and instructions for maintaining and repairing your snowmobile. You'll find everything you need to keep your BR250 running smoothly, from basic maintenance procedures to advanced engine and suspension repairs. The manual covers a wide range of topics, including: * **Model Specifications:** Detailed information on the BR250's specifications, including engine size, dimensions, and weight. * **General Information:** An overview of the BR250, including its design and features, as well as safety instructions and troubleshooting tips. * **Maintenance:** Step-by-step instructions for performing routine maintenance tasks, such as oil changes, air filter cleaning, and spark plug replacement. * **Fuel Systems:** Detailed information on the BR250's fuel system, including the carburetor, fuel lines, and fuel tank. * **Engine Systems:** Comprehensive coverage of the BR250's engine, including the cylinder head, pistons, crankshaft, and connecting rods. * **Final Drive and Brake Systems:** In-depth information on the BR250's final drive and brake systems, including the chain, sprockets, and brake calipers. * **PVT System:** Detailed information on the BR250's PVT system, which is responsible for transferring power from the engine to the track. * **Suspension and Steering:** Comprehensive coverage of the BR250's suspension and steering systems, including the shocks, springs, and steering components.