Detailed 1983-92 manual for Yamaha RD350 Twins models
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Yamaha Models Covered & Key Technical Specifications
Models: Yamaha RD350LC II, RD350F, RD350F II, RD350N, RD350N II, 31K, 57V, 1WT, 2YK, 3HM1
Sub-models / Variants: RD350 YPVS Twins, F, N
Trade Names: RD350 YPVS, RD350LC II
Build Years: 1983–1992
Technical Data:
- Engine: Water-cooled parallel twin two-stroke, 347 cc
- Bore x Stroke: 64.0 mm x 54.0 mm
- Compression Ratio: 6.0:1
- Idle Speed: 1150–1250 rpm
- Spark Plug Gap: 0.7–0.8 mm
- Ignition: Nippon Denso CDI, 17° BTDC at 1200 rpm
- Transmission: 6-speed, constant mesh
- Oil Pump Stroke: 0.10–0.15 mm (min), 2.05–2.27 mm (max)
Yamaha Manual Features & Content Preview
1983–1992 Yamaha RD350 YPVS Twins Service Manual
- Covers 1983–1992 Yamaha RD350 YPVS Twins, including RD350LC II, RD350F, RD350F II, RD350N, and RD350N II variants
- Official Haynes publication P/N 803, reflecting mid-cycle RD350 technical specifications
- Contains 134 pages of detailed engine, clutch, and gearbox service data, plus ignition and frame sections
- File delivered as a direct download the moment payment clears
- Full-text search finds any part number in seconds
- This 1983–1992 Yamaha RD350 YPVS Twins manual captures the critical YPVS valve and cooling system requirements for the 31K through 3HM1 series engines.
Documentation Walkthrough
The 1983–1992 Yamaha RD350 YPVS Twins service manual provides technical insight into the water-cooled twin-cylinder two-stroke power unit. Chapters explore engine disassembly, clutch assembly renovation, gearbox component inspection, and the Yamaha Autolube pump system. Cooling system chapters describe radiator maintenance, thermostat operation, and water pump overhaul procedures, while frame chapters detail Monocross rear suspension and steering head service.
Technical Scope and Data
Engine identification and assembly data include torque values for cylinder head, barrel, and crankcase fasteners. The 1983–1992 Yamaha RD350 YPVS engine timing is set at 17° BTDC at 1200 rpm as documented in the ignition section. Transmission specs include 6-speed constant mesh ratios and factory workshop documentation for gear selector mechanism alignment. Transmission oil capacity is 1.5 liters using SAE 10W30, with maintenance intervals detailed for the final drive chain and control cables.
Reference only — always consult a certified technician before performing service on this equipment.
An official 134-page Haynes OEM-authorized manual covering the 1983–1992 Yamaha RD350 YPVS Twins, documenting engine, cooling, chassis, fuel, and electrical system specifications for the 31K, 57V, 1WT, 2YK, and 3HM1-series builds.
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