1981-1984 Yamaha BR250F / BR250 Bravo Snowmobile Service Manual

Yamaha BR250F and Bravo Snowmobile Service Manual

• Covers 1981–1984 Yamaha BR250F and BR250 Bravo snowmobiles, featuring the 246 cm³ fan-cooled 2-stroke engine and V-belt automatic centrifugal transmission
• Official OEM publication LIT-12618-00-41, first edition June 1981
• Contains 19 exploded-view diagrams detailing system assembly and dozens of torque specification tables
• File link appears in your order confirmation straight away
• OCR text layer lets you jump to a torque spec by keyword
• This 1981 first edition is the primary reference for the 8R4-series build, providing the exact mechanical tolerances and factory-recommended service procedures required for correct engine and chassis maintenance.

Detailed System Coverage

This factory service publication provides complete teardown, assembly, and maintenance documentation for the Yamaha BR250F and Bravo lineup. Chapters are organized by primary vehicle systems, including engine disassembly and top-end inspection, carburetor tuning and adjustment, power train maintenance, chassis repair, and electrical system diagnostics. Technical content includes specific service parameters such as crankshaft deflection limits, primary and secondary sheave alignment values, and detailed wiring diagrams. Users find specific guidance on oil pump bleeding, track tension adjustments, and high-altitude carburetor jetting requirements.

Specification Highlights

Technical data is presented for professional-grade service, providing reference values for all critical mechanical components. Cylinder wall taper limits are specified at 0.05 mm, and piston clearance is documented at 0.045–0.050 mm. Electrical performance data covers charging and pulser coil resistance values at 20°C (68°F), with charging coil resistance listed at 426 ohms ± 10% and pulser coil resistance at 20 ohms ± 10%. Lubrication schedules are clearly defined, specifying the usage of Molybdenum disulfide for clutch components and Yamalube 2-cycle oil for the autolube injection system. Torque values are listed in both m-kg and ft-lb for all major fasteners, including the 10 m-kg (72 ft-lb) initial torque setting for the primary sheave bolt. This 191-page official Yamaha OEM service manual covers the 1981–1984 BR250F and Bravo snowmobiles, documenting engine, drivetrain, chassis, and electrical specifications for the 8R4-series build.