Yamaha RZ 500 1984–1986 OEM Service Manual (P/N C4256-90954)

This official service documentation provides the foundational reference data for maintaining and overhauling the RZ500N liquid-cooled two-stroke engine and YPVS configuration. Designed for professional mechanics and serious DIYers, it skips the fluff and delivers exact factory specifications for routine maintenance, engine teardowns, and chassis rebuilds.

• Original OEM publication (C4256-90954) covering standard frame and engine specifications for 1984–1986 models.
• 56 pages of exploded-view diagrams, electrical schematics, and component-specific torque tables.

Engine, Chassis, and Electrical Specifications

The manual details fundamental system management for carburetion, cooling, and electrical diagnostics. You get the exact tolerances required to keep your build precise and reliable. Documented specifications include wear limits for pistons, crankshaft runout, and transmission gear assemblies.

For quick reference during inspections, the cylinder head warp limit is 0.05 mm, and the standard spark plug gap is 0.6–0.7 mm. The documentation also features comprehensive schematic layouts to assist with the YPVS power valve system and complex transmission case assemblies.

Precision Data and Fluid Capacities

Accurate fluid capacities and torque specifications are crucial for equipment longevity. Working on vintage high-performance two-stroke motorcycles requires strict adherence to standard workshop safety protocols, including the use of properly calibrated tools before applying these factory numbers.

Key specifications detailed in this reference include:

• Coolant system: 1.95 liters total fill
• Transmission oil: 1.5 liters (SAE 10W30 SE)
• Fork oil: 300 cc per leg
• Crankcase main fasteners: 24 Nm torque