🏷️ Basic Information Identification Make: Yamaha Model: TZ125 Generation: G1/G Model Year: 1995 Product Name: TZ125 G1/G 1995 Yamaha Service Repair Manual PDF Download Codes Internal Model Code: TZ125G 👋 Introduction Market Position Market Segment: Competition Motorcycle (2-stroke, single-cylinder, 125cc class) Target Audience: Privateer racers, club racers, track day enthusiasts, and mechanics specializing in vintage or small-displacement 2-stroke motorcycles. Competitive Analysis Competitors: Honda RS125, Suzuki RG125, Aprilia RS125 (depending on specific racing class regulations of the era). Key Features Manual Value Proposition: Provides factory-level diagnostic and repair procedures, enabling owners to perform maintenance and repairs themselves, saving on labor costs. Essential for maintaining optimal performance and longevity of the TZ125 racing platform. Content Detail: Step-by-step instructions and repair information for comprehensive maintenance and troubleshooting. 📋 Manual Details Coverage Coverage Areas: General Information, Periodic Maintenance, Tune-up Procedures, Engine, Fuel and Lubrication System, Electrical System, Chassis, Servicing Information Pages Page Count: 243 Type Manual Type: Service Repair Manual Manual Usage: Professional technician level service and repair. Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Systems Covered: Engine mechanicals, cooling system, fuel delivery, lubrication, ignition system, lighting, charging system, frame, suspension (front and rear), brakes (front and rear), wheels and tires, controls, exhaust system, basic electrical diagnostics. Procedures Procedures Included: Routine maintenance checks, oil changes, filter replacements, spark plug servicing, carburetor tuning and cleaning, ignition timing adjustment, suspension setup, brake system inspection and servicing, wheel bearing maintenance, chain adjustment and lubrication, disassembly and reassembly of major components, troubleshooting common electrical and mechanical faults. Depth Technical Depth: Comprehensive. Suitable for professional technicians and experienced DIY mechanics. Covers detailed disassembly, inspection, repair, and reassembly of all major motorcycle systems. Includes diagnostic procedures and specifications for accurate troubleshooting. Systems Covered Electrical System Detail: Wiring diagrams, lighting circuits, ignition coil testing, battery and charging system checks, basic troubleshooting of electrical faults. Chassis And Suspension: Frame inspection, front fork servicing (damping, seals, oil), rear shock absorber inspection and adjustment, wheel and tire maintenance, steering system. Procedures Included Engine Rebuild Scope: Includes detailed instructions for cylinder head removal, piston and connecting rod replacement, crankshaft inspection, crank seal checks, and cylinder honing or replacement. Chassis Adjustment Procedures: Steering head bearing adjustment, swingarm pivot bearing checks, and general chassis alignment checks. Technical Depth Diagnostic Procedures: Covers symptom-based troubleshooting, measurement of key parameters (compression, ignition timing), and component testing for accurate diagnosis. 📊 Manual Specifications File File Format: PDF Print Quality: Printable from Adobe PDF Reader Searchability: PDF format typically allows for text searching of keywords. Compatibility: Compatible with Windows and Mac operating systems. Required Software: Adobe PDF Reader or equivalent. Binding Binding Type: Digital Download (PDF) Paper Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, liquid-cooled, single-cylinder Displacement: 124.8 cc (approximate) Performance Bore X Stroke: 56.0 mm x 50.7 mm (typical for this model series) Compression Ratio: Specific ratio to be found within the manual, critical for tuning. Power Output: Typically in the range of 30-40 HP, highly dependent on tuning and modifications. Torque Curve: The manual provides information relevant to achieving an optimal powerband for racing. Fuel System Carburetor Type: Mikuni VM series (likely 34mm or similar performance variant, as per racing specifications) Fuel Type: High-octane gasoline with appropriate 2-stroke oil pre-mix. Fuel Mixture Ratio: Specific oil-to-fuel ratio specified in the manual, critical for lubrication and engine life. Lubrication Lubrication System: Premix or Autolube (manual will specify for the G1/G variant) 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Optional Gear Ratios: Specific ratios are detailed in the manual, crucial for track tuning. Features Clutch Type: Wet, multi-plate 📐 Dimensions Exterior Overall Length: Refer to manual for precise dimensions specific to the G1/G model. Wheelbase: Refer to manual for precise dimensions. Weights Dry Weight: Typically around 90-100 kg for this class of racing motorcycle. 🛡️ Safety Features Ratings Safety Features Focus: The manual focuses on mechanical and operational safety through proper maintenance and repair procedures, not passive/active safety features in the consumer sense. Active Features Braking System: Hydraulic disc brakes front and rear. Manual will detail servicing for calipers, master cylinders, and lines. Passive Features Frame Construction: Aluminum alloy twin-spar frame for rigidity and light weight. 💡 Technology Features Infotainment Infotainment System: N/A (Pure racing motorcycle with minimal rider amenities). Driver Assistance Driver Assistance Features: N/A (Pure racing motorcycle). Connectivity Connectivity Features: N/A (Pure racing motorcycle). 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual; typically after a set number of race hours or event days. Spark Plug Service: Frequent checks and replacement recommended for optimal performance, especially under racing conditions. Manual will specify types and gaps. Top End Rebuild: Required at regular intervals for 2-stroke racing engines; manual will detail procedure and part replacement criteria. Fluid Specifications Coolant Type: Ethylene glycol based coolant with corrosion inhibitors. Specific mix ratio and capacity...