The YTM225DRS Tri-Moto, produced from 1983 to 1986, is a robust three-wheeled all-terrain vehicle engineered for utility and recreational off-road use. Building on a strong motorsports heritage, this model offers a blend of performance and reliability characteristic of a commitment to quality. Its design emphasizes practical functionality and durability, making it a capable machine for various terrains and tasks. The YTM225DRS features a 225cc air-cooled engine, a 5-speed transmission with reverse, and a chain drive system, all housed within a sturdy steel frame. This comprehensive workshop service manual provides detailed guidance for the repair and maintenance of the YTM225DRS Tri-Moto. Covering all essential systems including the engine, transmission, fuel, ignition, and electrical systems, it offers step-by-step instructions for overhaul, routine servicing, and troubleshooting. The manual includes critical technical specifications, wiring diagrams, and information on special tools, ensuring that technicians and owners can perform repairs with precision and confidence. Its scope is designed to empower users to maintain their vehicle effectively, mirroring the standards of authorized service departments. 🏷️ Basic Information Identification Make: Yamaha Model: YTM225DRS Tri-Moto Model Years Covered: 1983, 1984, 1985, 1986 Codes Vin Prefix: JY0 👋 Introduction Market Position Target Audience: Technicians, owners, and enthusiasts performing maintenance and repairs Value Proposition: Enables DIY repairs, saving costs compared to dealer service, and builds a reputation for quality service Competitive Analysis Advantage: Provides information and procedures comparable to authorized Yamaha dealer service departments Key Features Completeness: Contains all necessary instructions for any required repair Accuracy: Endeavored to ensure accuracy of information for reliable repairs User Empowerment: Empowers owners to be better informed and perform repairs knowledgeably like a professional 📋 Manual Details Coverage Areas Primary Coverage: Workshop Repair and Service Scope: Comprehensive repair and overhaul of Yamaha YTM225DRS Tri-Moto models Page Count Total Pages: 282 Manual Type Type: Workshop Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete overhaul, tuning, lubrication, exhaust systems Transmission: Complete disassembly and assembly, maintenance Fuel System: Carburetor service, fuel tank, fuel lines, filtration Ignition System: Ignition timing, spark plug service, electrical components Electrical System: Wiring diagrams, battery, lighting, charging system Body: Body panel removal and installation, general bodywork Procedures Included Maintenance: Routine servicing, lubrication, fluid changes, inspections Repair: Detailed step-by-step repair instructions for all major components Overhaul: Engine and transmission complete rebuild procedures Troubleshooting: Diagnostic procedures for common and uncommon issues Removal Installation: Component removal and installation steps Assembly Disassembly: Detailed breakdown and reassembly of assemblies Technical Depth Depth: Covers general automobile practices and emphasizes product-specific aspects for quality service Special Components: Includes instructions for proprietary components and their manufacturers Diagnostic Focus: Provides diagnostic and repair procedures for troubleshooting Precision Requirements: Emphasizes the use of torque wrenches for adherence to specifications Special Tools: Identifies and illustrates recommended or required special tools with Yamaha part numbers 📊 Manual Specifications File Format Format: PDF Delivery: Fast and Free Electronic Delivery via Email Print Quality Printable: Yes Binding Type Binding: Not Applicable (Digital Delivery) Paper Type Paper Type: Not Applicable (Digital Delivery) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, SOHC, 2-valve Displacement: 225 cc (13.7 cubic inches) Bore X Stroke: 68.0 mm x 64.0 mm (2.68 in x 2.52 in) Compression Ratio: 8.5:1 Carburetor Model: Mikuni VM26SS Performance Estimated Horsepower: Approximately 15-18 HP (specific figures may vary by year/tuning) Estimated Torque: Figures not explicitly stated, but expected to be robust for its class Fuel System Fuel Type: Unleaded gasoline Fuel Tank Capacity: Approximately 2.4 gallons (9 liters) Lubrication System Oil Type: Yamalube 4 (or equivalent API SE, SF or SG service classification SAE 20W-40 or 10W-30) Oil Capacity: Approximately 1.0 L (1.1 US qt) without filter change, 1.1 L (1.2 US qt) with filter change 🔧 Transmission Standard Type: 5-speed constant mesh with reverse Features Clutch Type: Wet, multiple-disc Final Drive: Chain drive Fluid Specifications Transmission Oil Type: Yamalube 4 (or equivalent API SE, SF or SG service classification SAE 80 or 75W-90 gear oil) Fluid Capacities Transmission Oil Capacity: Approximately 0.7 L (0.74 US qt) 📐 Dimensions Exterior Overall Length: Approx. 71.1 in (1805 mm) Overall Width: Approx. 37.6 in (955 mm) Overall Height: Approx. 40.2 in (1020 mm) Weights Dry Weight: Approx. 337 lbs (153 kg) Curb Weight: Not specified, but typically higher than dry weight 🛡️ Safety Features Active Features Braking System: Front: Dual leading shoe drum brake; Rear: Drum brake (specific type may vary by year/model variant) Lighting: Headlight, taillight, brake light Passive Features Frame Construction: Robust steel frame designed for off-road use Hand Grips: Designed for secure control 💡 Technology Features Infotainment System Type: Not applicable; this is a 1980s utility vehicle with minimal technology features focused on mechanical operation. Driver Assistance Features: Not applicable; no electronic driver assistance features are present. Connectivity Features: Not applicable; no connectivity features. 🔧 Maintenance Service Intervals Engine...