Yamaha YFB250D ATV 1992 Parts Catalog (PN 4BD-21110-00-R4)

• Official Yamaha OEM publication (PN 4BD-21110-00-R4) for 1992 Yamaha YFB250D Utility-ATV models.
• Features detailed exploded-view diagrams for the engine, chassis, and electrical assemblies.

Assembly Breakdowns and Workshop Utility

Finding the exact replacement component shouldn't stall your shop's workflow. This 1,352-page OEM reference streamlines the ordering process by providing original part numbers directly alongside detailed exploded views. You can immediately see how the cylinder head, crankshaft-piston group, and camshaft-chain drive fit together. Grab the instant download, open the file on your shop tablet, and accurately match what is on your lift to the factory diagrams. The catalog also covers carburetor components, exhaust parts, crankcase covers, fender assemblies, and the complete electrical harness, including CDI unit identification.

Technical Specifications and Part Identification

Getting the specs right the first time prevents costly re-orders. This manual provides critical identification data, listing the NGK D7EA spark plug as the factory standard. Transmission data is equally precise, breaking down internal gears like the 1st through 5th wheels and their corresponding pinions. It also specifies exact thickness values for shims used in the middle drive gear and rear axle gear case.

Always secure the ATV and disconnect the battery before removing any covers or starting disassembly to maintain a safe working environment. Please note that this document is strictly an identification and ordering reference, not a step-by-step diagnostic guide.