Yamaha RZ350L/N/NC 1984–1985 OEM Service Manual (P/N LIT-11616-04-70, LIT-11616-04-12)

• Covers 1984–1985 Yamaha RZ350L, RZ350N, and RZ350NC liquid-cooled 2-stroke motorcycles, with base service procedures and an appended N/NC specification supplement.
• Engine repair extends from removal and crankcase separation to crankshaft inspection, wet-clutch overhaul, and constant-mesh six-speed transmission service.
• Y.P.V.S. coverage combines power-valve removal and cleaning with cable adjustment, servomotor and potentiometer tests, and control-unit troubleshooting.
• Twin Mikuni VM26SS carburetors are covered through disassembly, float- and fuel-level inspection, and synchronization. Yamaha Autolube procedures cover pump-output testing, stroke adjustment, and bleeding.
• Cooling-system service covers radiator-cap and circuit pressure tests, water-pump inspection, and thermostatic-valve testing.
• Chassis repair includes brake-caliper and master-cylinder overhaul, hydraulic bleeding, fork disassembly and seal replacement, and swingarm clearance adjustment.
• Electrical fault tracing includes the RZ350L Wiring Diagram and circuit-specific tests for C.D.I. ignition, charging, lighting, and the catalytic-converter warning system.

Model Identification and Included Publications

This 240-page PDF combines 227 pages of base service material, including front matter, with a 13-page RZ350N/NC supplement. The opening imprint is first edition, January 1984; the supplement is first edition, October 1984, P/N LIT-11616-04-70. The supplement’s foreword identifies the companion RZ350L base manual as LIT-11616-04-12.

The identification tables distinguish the 48H-coded L/N models from the 1EL-coded NC. Engine starting numbers are 48H-000101 for L, 48H-010101 for N, and 1EL-000101 for NC. Carburetor IDs are 48H00 for L/N and 1EL00 for NC. The N/NC supplement supplies revised ignition and generator specifications for use with the base repair procedures, rather than separate model-specific overhaul chapters.

Engine, Fuel, and Cooling Repair

The manual identifies cylinder-head, cylinder, piston, and clutch work that can be performed with the engine still in the frame. Internal inspection addresses piston and ring condition, connecting-rod play, gear engagement dogs, shift forks, and crankshaft runout. Intake reed-valve inspection covers petal fatigue, seating, and stopper clearance. The Engine Lubrication Chart and carburetor Sectional View support reassembly and fuel-circuit diagnosis.

Periodic inspection charts separate emission-control maintenance from general lubrication and service. Troubleshooting tables divide hard starting, poor idle, and weak midrange or high-speed performance into ignition, fuel, and engine/exhaust causes.

Cooling-system illustrations distinguish bypass flow from radiator circulation. Water-pump installation notes flag the risk of damaging the seal lip or dislodging its spring when fitting the impeller shaft.

Suspension and Electrical Scope

The air-assisted fork with variable damper and link-type Monocross suspension have their own operating explanations. Chassis procedures cover steering bearings, suspension linkage bushings, and the belt-driven rear-spring preload adjuster. Fork disassembly notes warn that bottoming the inner tube can damage the taper spindle.

Rear-shock coverage includes removal, inspection, and replacement—not internal rebuilding of the nitrogen-charged damper.

Electrical diagnosis extends to sidestand interlocks, self-canceling turn signals, the water-temperature gauge, and the Catalyzer light and buzzer. The YPVS System circuit diagram and the Catalyzer block diagram support component checks. Cable Routing drawings identify harness, control-cable, and hose placement.

Specification Highlights

Reference tables document engine clearances, wear limits, fluid capacities, and tightening torques, with torque data in Nm and ft-lb and separate electrical test specifications. Exploded assembly drawings pair component layouts with the relevant assembly notes and specifications.

The special-tool section identifies clutch holder YM-91042, flywheel puller YM-01189, and fork-seal driver YM-33963 with adapter YM-01369.

Always follow the factory specifications and safety warnings, particularly for brake hydraulics and the pressurized cooling system.