2004 Polaris Sportsman 400 & 500 Service Manual (P/N 2870791)

• Official 343-page OEM publication detailing the 2004 Polaris Sportsman 400 and 500 ATVs.
• Includes data for Early and Late 2004 production builds, Hunter Edition variants, and standard configurations.
• Features 56 technical specification tables, over 35 exploded-view diagrams, and 12 detailed transmission, engine lubrication, and timing diagrams.
• Provides factory-authorized repair and maintenance parameters specific to these chassis and engine families.

Manual Content Summary

This technical document delivers the exact maintenance and repair parameters required for the 2004 Polaris Sportsman 400 and 500 models. It cuts straight to the chase. You get vital chapters on vehicle identification, strict maintenance schedules, and deep engine diagnostics. Major systems covered include fuel delivery, carburetion, PVT clutching, final drive assemblies, and drivetrain mechanicals. It also breaks down braking systems and full electrical schematics. Every procedural section provides the hard technical parameters you need for component inspection. We included critical identification information right in the text to help you quickly distinguish between early and late production builds in the workshop.

Technical Specifications Preview

Precision matters when you are turning wrenches. These manuals document exact factory tolerances. Valve clearances for both intake and exhaust are specified at 0.006" (0.15 mm). Engine oil capacity sits at a standard 2.25 quarts (2.1 L), while the transmission fluid capacity is documented at 32 oz. Crankshaft main bearing end play is tightly specified between 0.008" and 0.016" (0.02–0.04 cm). You will find standard torque values mapped out clearly, such as front wheel nuts at 20 ft. lbs. (27 Nm) and rear hub retaining nuts at 100 ft. lbs. (136 Nm). Reference data for engine mounts, piston-to-cylinder clearance, and cylinder head torque sequences makes engine mechanical assembly straightforward.

Please note that while this manual provides comprehensive factory data, it is intended as a professional reference tool. Always consult a certified technician prior to performing major structural or engine maintenance on your equipment.