1987-1999 Yamaha Big Bear 350 YFM350FW ATV Service Manual

Yamaha Big Bear 350 1987–1999 Service Manual

• Built for owners and workshops servicing the 1987–1999 Yamaha Big Bear 350 YFM350FW, covering complete powertrain and chassis maintenance
• Official Yamaha publication P/N 4WU-W0747-00-AD
• Contains 47 exploded-view diagrams and 35 torque-specification tables for engine and chassis fasteners
• Downloads to your account within seconds of checkout
• Your order stays downloadable from your account for life
• Indexed PDF search covers every chapter and appendix
• Full-text search finds any part number in seconds
• This official 1987–1999 Yamaha Big Bear 350 publication includes the specific 1YW-000101 serial-number range diagnostics for the 350-series engine build

Documentation Scope

The 1987–1999 Yamaha Big Bear 350 service manual provides structured reference data across eight primary chapters, beginning with machine identification and special tool lists. It details periodic inspection criteria, including valve clearance adjustments, throttle linkage calibration, and ignition timing verification.

The document further outlines engine overhaul protocols, spanning disassembly and assembly of the cylinder head, clutch assemblies, and transmission components. Each section integrates visual diagrams with component-specific inspection limits and clearance specifications.

Technical Data Preview

Engine component specifications are presented with high detail, documenting primary gear, piston, and crankshaft tolerances. Cylinder head bolt torque is defined at 10 Nm for tappet covers, while the main bearing cap requires 115 Nm as documented in the overhaul section. The 1987–1999 Yamaha Big Bear 350 oil gallery bolt is specified at 7 Nm in the inspection data. The flywheel puller is identified as P/N YM-01404 in the special tools section. understanding factory workshop documentation aids in navigating these technical specs and exploded views effectively. All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work.

An official 294-page Yamaha OEM service manual covering the 1987–1999 Yamaha Big Bear 350 YFM350FW, documenting engine, chassis, electrical, and drive-system specifications for the 1YW and 4WU-series production builds.