1984 Yamaha ET250 / Enticer 250 Snowmobile Service Manual (P/N B8V-21771-00)

• Official 199-page OEM workshop publication (Part B8V-21771-00) for the 1984 ET250 Enticer (84G-series).
• Delivers factory-specified engine rebuild tolerances, assembly clearances, and essential teardown data.
• Features over 80 detailed technical diagrams, exploded assembly views, and precise carburetor tuning charts.
• Outlines critical maintenance schedules, lubrication intervals, and seasonal service guidance.

Component and Systems Coverage

This technical reference provides a complete breakdown of the Enticer 250. It details the exact specifications for tearing down and reassembling the two-stroke engine, recoil starter, and fuel delivery systems. You get the factory parameters needed for proper power train servicing. That includes sheave alignment and track tensioning, alongside chassis and suspension setups. The documentation also covers the reverse gear mechanism and electrical system integration. Always ensure the track is suspended and the power supply is disconnected before inspecting drivetrain components to maintain a safe working environment.

Technical Preview and Reference Values

Finding the right factory spec during a rebuild should never slow down your workflow. This manual provides immediate access to critical engine assembly data, including the 20 Nm torque rating for crankcase securing bolts and the strict 0.03 mm cylinder head warp limit. Precise piston-to-cylinder clearance is officially documented at 0.040–0.045 mm.

Beyond the engine block, the reference material includes extensive fuel system data. You will find comprehensive main jet selection tables factoring in both altitude and temperature variations, allowing you to effectively tune the carburetor for peak winter performance. This content overview specifically outlines the diagnostic and reference data available in the complete publication.