The TZR 125, produced between 1987 and 1993, represents a significant entry in the sportbike segment, embodying a commitment to performance and engineering. This first-generation model, identified by its 2RH engine code, features a potent two-stroke, liquid-cooled, single-cylinder engine with a displacement of 124.7 cc, delivering approximately 25-30 horsepower. Its design prioritizes agility and a sporty riding experience, incorporating a 6-speed transmission, wet multi-plate clutch, and chain final drive. The TZR 125 is recognized for its advanced technology for its time, including reed valve induction and an autolube system, making it a capable and engaging machine for enthusiasts. This comprehensive workshop service repair manual provides extensive information for the TZR 125, covering all variants from 1987 to 1993. It is meticulously designed to assist both do-it-yourself enthusiasts and experienced mechanics in maintaining and repairing the vehicle. The manual details procedures for engine mechanical and electrical systems, fuel and emission control, suspension, clutch, transmission, brakes, and bodywork, including electrical components. With step-by-step instructions, detailed illustrations, wiring diagrams, and troubleshooting guidance, this high-quality, authoritative resource ensures proper upkeep and operational integrity of your TZR 125. 🏷️ Basic Information Identification Make: Yamaha Model: TZR 125 Generation: 1st Generation (2RH) Production Years: 1987-1993 Codes Engine Codes: 2RH 👋 Introduction Market Position Target Audience: Do-it-yourself enthusiasts and experienced mechanics Value Proposition: Inexpensive way to keep the vehicle working properly; comprehensive repair and service information Competitive Analysis Manual Quality: High-quality, detailed, and authoritative Key Features Instruction Style: Numbered instructions, detailed substeps, cautions and warnings Visual Aid Quality: Detailed illustrations, drawings, and photos Navigation: Numbered table of contents for quick access 📋 Manual Details Coverage Areas Covered Years: 1987, 1988, 1989, 1990, 1991, 1992, 1993 Model Variants: TZR 125 (all variants within the specified years) Page Count Estimated Page Count: Extensive (Specific count not provided, but implied to be comprehensive for all systems) Manual Type Type: Workshop Service Repair Manual (Factory Service Repair Manual) Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Yes (Comprehensive Engine Electrical: Yes (Includes diagnostics and wiring diagrams Emission Control: Yes Fuel System: Yes (Carburetor, fuel lines, etc.) Suspension: Yes (Front forks, rear shock, adjustments) Clutch: Yes (Operation, maintenance, repair) Transmission: Yes (Manual Transaxle System) Driveshaft Axle: Yes Steering: Yes Brakes: Yes (Front and rear systems) Body Interior Exterior: Yes (Bodywork, panels, fairings, interior components) Body Electrical: Yes (Lighting, switches, accessories) Restraint System: Yes (Seat belts, if applicable, or related safety components) Procedures Included Maintenance: Yes (Routine checks, adjustments, fluid changes) Troubleshooting: Yes (Integrated with electrical service procedures) Repair: Yes (Step-by-step instructions for component repair and replacement) Diagnostics: Yes (Especially for electrical systems) Disassembly Reassembly: Yes (Implied by step-by-step instructions and detailed illustrations) Technical Depth Depth: Comprehensive (Suitable for both DIY and experienced mechanics) Documentation Type: Detailed illustrations, diagrams, wiring schematics, specifications 📊 Manual Specifications File Format Format: PDF Viewing Requirements: Adobe PDF Reader Print Quality Printability: Fully Printable (Individual pages) Zoom Capability: Yes (Zoom In/OUT) Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) Delivery Delivery Method: Instant Download Requirements Unzipping Software: WinZip (or equivalent) Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, liquid-cooled, single-cylinder Displacement: 124.7 cc Bore X Stroke: 56.4 mm x 50.0 mm Compression Ratio: 7.0:1 (approximate, may vary by market) Power Output: Approx. 25-30 hp @ 8,500 rpm (Varies by market and specific model year) Torque: Approx. 2.2 kgf-m @ 8,000 rpm (Varies by market) Fuel System Carburetor Type: Mikuni VM28SS (or similar) Fuel Delivery: Carburetor with reed valve induction Fuel Type: Unleaded gasoline Oil Mixing: Autolube (Premix or separate oil injection system) 🔧 Transmission Standard Type: 6-speed constant mesh, sequential Clutch Type: Wet, multi-plate Features Gear Ratios: Detailed ratios available within the manual Final Drive: Chain drive 📐 Dimensions Exterior Length: Approx. 1,990 mm (78.3 in) Width: Approx. 710 mm (28.0 in) Height: Approx. 1,140 mm (44.9 in) Wheelbase: Approx. 1,340 mm (52.8 in) Weights Dry Weight: Approx. 126 kg (278 lbs) Wet Weight: Approx. 138 kg (304 lbs) 🛡️ Safety Features Ratings Safety Standards: Compliant with contemporary motorcycle safety regulations of the era Active Features Brakes Front: Disc brake (Hydraulically actuated) Brakes Rear: Drum brake (Mechanically actuated) Passive Features Lighting: Halogen headlight, taillight, turn signals 💡 Technology Features Infotainment Infotainment System: N/A (Vehicle is from an era without modern infotainment systems) Driver Assistance Driver Assistance Features: N/A (Vehicle is from an era without modern driver assistance systems) Connectivity Connectivity Options: N/A (Vehicle is from an era without modern connectivity) 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual for specific mileage/time intervals Spark Plug Replacement: Refer to manual for specific mileage/time intervals Chain Lubrication Adjustment: Regularly (Refer to manual) Fluid Specifications Engine Oil Type: 2-stroke pre-mix oil (Specific API/JASO classification in manual) Coolant Type: Ethylene...