1983-1987 Yamaha YTM200K Tri-Moto Service Manual (P/N YU-08037 YM-33278)
Yamaha Models Covered & Key Technical Specifications
Models: YTM200K
Model Years: 1983–1987
Serial Numbers: 21V-000101 and up
Technical Data:
- Engine: 4-stroke, gasoline, SOHC, single-cylinder
- Engine displacement: 196 cm3
- Compression ratio: 8.5:1
- Compression pressure: 883 kPa (9 kg/cm2, 128 psi)
- Fuel system: VM22/MIKUNI carburetor
- Fuel tank capacity: 9.0 L (2.0 Imp gal, 2.4 US gal)
- Transmission: 5-speed, constant mesh, left-foot operation
- Final drive: Chain drive
- Front suspension: Telescopic fork
- Front wheel travel: 100 mm (4.0 in)
- Tire size: 22x11-8 (tubeless)
Yamaha Manual Features & Content Preview
- Covers the 1983–1987 Yamaha YTM200K Tri-Moto three-wheelers, detailing engine, chassis, and electrical system specifications.
- Original OEM publication, form number 21V.
- Features 47 exploded-view diagrams and 39 detailed technical specification tables for streamlined engine and chassis maintenance.
- This 126-page reference is the factory-authorized resource for the YTM200K Tri-Moto, documenting all critical clearances and tolerances for the 21V-series build.
Component and Engine Overhaul Breakdown
Working on vintage three-wheelers requires accurate baseline data to ensure reliability and rider protection. Always follow standard workshop safety practices and wear appropriate gear when handling heavy components or hazardous fluids. This manual documents the entire vehicle, beginning with identification marks, special tool requirements, and periodic maintenance schedules tailored to different environmental conditions. It outlines critical inspection procedures for the engine. You will find top-end component wear limits, precise valve clearance settings, and decompression system adjustments. Chassis coverage breaks down the steering head assembly, front fork maintenance, and drive chain tensioning. It also defines brake system inspection criteria alongside wheel bearing assessments.
Technical Data and Specifications
Having the exact numbers on hand speeds up any rebuild. Detailed tables provide essential reference values, including standard and wear-limit dimensions for the piston, cylinder, crankshaft, and valve train. The documentation also maps out the electrical framework. It includes complete wiring diagrams for the CDI ignition system and lighting circuits, featuring color codes and testing procedures for the magneto, coils, and switches.
Key reference values included in the documentation:
- Intake valve clearance is specified at 0.05–0.09 mm.
- Fuel tank capacity is documented at 9.0 liters.
- Engine oil capacity requires 1.8 liters for a dry fill, or 1.5 liters during periodic changes.
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