Market Segment:
Recreational Off-Road Vehicles (ATVs/Trikes)
Competitors:
Honda ATC series, Suzuki LT series (early models), Kawasaki Tecate.
Unique Selling Points:
Shaft drive for reduced maintenance compared to chain drive, electric start for convenience, robust Yamaha engineering for reliability.
Systems Covered:
General Information, Troubleshooting, Lubrication & Maintenance, Tune-Up, Engine Overhaul, Clutch, Transmission, Fuel System, Exhaust System, Electrical System, Front Suspension & Steering (YTM200 & YTM225), Front Suspension & Steering (YFM200 - likely a typo, intended for YTM200), Rear Suspension & Final Drive, Brakes
Frame And Chassis:
Covered implicitly through suspension and general disassembly procedures.
Bodywork And Plastics:
Covered under general information and potentially specific disassembly sections for access.
Procedures Included:
Complete tear down and rebuild, maintenance schedules, tune-up procedures, troubleshooting common problems, component replacement, adjustments, diagnostic procedures, torque specifications, fluid recommendations.
Technical Depth:
Comprehensive, covering everything from basic maintenance and adjustments to complete engine and transmission rebuilds. Includes detailed diagrams and illustrations.
Illustration Quality:
Includes pictures and part diagrams for easy identification and assembly/disassembly guidance.
Torque Specifications:
Detailed torque specifications for critical engine, chassis, and suspension components are provided.
Engine Type:
4-stroke, Air-Cooled (typically OHC)
Ytm200 Displacement:
Approx. 196cc
Ytm225 Displacement:
Approx. 222cc
Bore X Stroke:
Varies by model, detailed in manual
Compression Ratio:
Varies by model, detailed in manual
Horsepower:
Not explicitly stated, but generally in the 15-20 HP range depending on model and tuning (detailed performance metrics in manual)
Torque:
Not explicitly stated, but sufficient for recreational off-road use (detailed performance metrics in manual)
Carburetor:
Mikuni Carburetor (specific model and jetting detailed in manual)
Fuel Type:
Unleaded gasoline
Efi Capability:
No (Carburetor based systems)
Engine Oil Type:
API SE, SF, SG or higher, SAE 10W-30 or 20W-40 recommended (refer to manual for exact viscosity based on temperature)
Oil Capacity:
Varies by model, detailed in manual (typically around 1.5-2.0 liters)
Drive System:
Shaft Drive with Final Reduction Gear
Reverse Gear:
Yes, standard feature on specified models
Transmission Type:
5-Speed Manual with Reverse (specific gear ratios detailed in manual)
Clutch Type:
Wet, Multi-plate Clutch, Cable Operated
Transmission Fluid:
Yamaha Genuine Gear Oil or equivalent SAE 80 API GL-4 (refer to manual for specific type and capacity)
Overall Length:
Varies by model, detailed in manual
Overall Width:
Varies by model, detailed in manual
Overall Height:
Varies by model, detailed in manual
Dry Weight:
Varies by model, detailed in manual (typically in the 300-400 lbs range)
Ground Clearance:
Varies by model, detailed in manual
Crash Safety:
N/A (Off-road recreational vehicle, no standardized crash ratings apply)
Braking System:
Front: Drum Brake; Rear: Drum Brake (specific details and adjustment procedures in manual)
Lighting:
Headlight, Taillight/Brake Light (electrical system coverage includes maintenance and troubleshooting)
Infotainment Features:
N/A (Basic recreational vehicle, no infotainment system)
Driver Assistance Systems:
N/A (Basic recreational vehicle, no electronic driver assistance)
Ignition System:
CDI (Capacitor Discharge Ignition) system, details on stator, CDI unit, and coil testing included.
Starting System:
Electric Start with backup kick starter (details on starter motor, solenoid, battery charging system covered)
Oil Change Interval:
Typically every 6 months or 1,000-1,500 miles (refer to manual for specific mileage and hours, and severity of use adjustments)
Spark Plug Maintenance:
Inspect and clean/gap every 1,000 miles, replace as needed (refer to manual for specific gap)
Air Filter Maintenance:
Clean or replace as needed based on operating conditions (e.g., dusty environments require more frequent cleaning)
Valve Clearance Adjustment:
Recommended at specific intervals (e.g., every 3,000-5,000 miles or as specified in manual), crucial for performance and engine longevity.
Brake Fluid:
DOT 3 or DOT 4 brake fluid (ensure cleanliness during replacement)
Final Drive Fluid:
Yamaha Genuine Gear Oil or SAE 80 API GL-4 (refer to manual for specific type and capacity)
Coolant Type:
Air-cooled, no coolant required
Common Problems:
Carburetor gumming due to infrequent use, ignition system component failures (coil, CDI), brake wear, carburetor jetting issues, occasional starting problems (especially in cold weather).
No Spark Diagnosis:
Manual provides detailed steps for diagnosing no-spark conditions, including checking the ignition coil, CDI unit, stator, spark plug, and wiring.
Tune Up Procedures:
Covers carburetor adjustment (idle speed, mixture screw), ignition timing checks, spark plug gap, and general engine inspection.
Yamaha Legacy:
Yamaha has a long history in motorsports and powersports, known for innovation and performance in motorcycles, ATVs, and snowmobiles.
Tri Moto Development:
The Tri-Moto series was Yamaha's entry into the burgeoning three-wheeled ATV market of the early 1980s, offering a stable and versatile recreational platform.
Ytm200 Variants:
YTM200E/ER (Yamahauler) featured electric start and a different front-end configuration compared to some earlier models.
Ytm225 Variants:
YTM225DX and YTM225DR offered increased displacement for more power and torque.
Production Period:
Early to mid-1980s (1983-1986 covered by this manual)