Segment:
        
        
            Entry-level commuter motorcycle, lightweight sport/naked bike.
        
     
    
        
            Target Audience:
        
        
            New riders, urban commuters, cost-conscious motorcycle enthusiasts.
        
     
    
    
        
            Key Competitors:
        
        
            Honda CB125F, Suzuki GSX-S125, Kawasaki Z125.
        
     
    
    
        
            Reliability:
        
        
            Known for Yamaha's robust engineering and durability.
        
     
    
        
            Fuel Efficiency:
        
        
            Excellent fuel economy, making it economical for daily use.
        
     
    
        
            Handling:
        
        
            Lightweight and agile, suitable for navigating city traffic.
        
     
    
        
            Design:
        
        
            Sporty and modern styling for its class.
        
     
    
    
        
            Value Proposition:
        
        
            Essential reference for identifying and sourcing correct OEM Yamaha replacement parts, ensuring proper maintenance and repair.
        
     
 
    
    
    
        
            Primary Coverage:
        
        
            All genuine Yamaha YBR 125 motorcycle parts and assemblies.
        
     
    
        
            Secondary Coverage:
        
        
            Exploded views of major motorcycle systems, part identification numbers, and basic assembly relationships.
        
     
    
    
        
            Estimated Pages:
        
        
            Approximately 200-300 pages (variable by edition/specific model variant).
        
     
    
    
    
    
        
            Language:
        
        
            English (Typical for international markets, may vary by regional edition).
        
     
    
    
        
            Format:
        
        
            Digital (PDF) and potentially Printed.
        
     
 
    
    
    
        
            Engine:
        
        
            Cylinder, cylinder head, piston, crankshaft, camshaft, valves, timing system, lubrication system, cooling system (air-cooled).
        
     
    
        
            Fuel System:
        
        
            Carburetor assembly, fuel tank, fuel lines, fuel filter, throttle control.
        
     
    
        
            Transmission:
        
        
            Clutch assembly, gearbox internals (gears, shafts, selectors), drive chain and sprockets.
        
     
    
        
            Chassis Frame:
        
        
            Main frame, sub-frame, swingarm, rear suspension linkage (if applicable).
        
     
    
        
            Front Suspension:
        
        
            Front forks, triple clamps, steering head bearings, front axle.
        
     
    
        
            Rear Suspension:
        
        
            Shock absorber(s), swingarm pivots, chain adjusters.
        
     
    
        
            Brakes Front:
        
        
            Brake caliper, brake disc, master cylinder, brake lever, brake pads, brake lines.
        
     
    
        
            Brakes Rear:
        
        
            Brake drum or disc (depending on variant), brake shoes or pads, brake pedal, brake linkage.
        
     
    
        
            Wheels Tires:
        
        
            Front and rear wheels (spoked or alloy), wheel hubs, spokes, wheel bearings, tire specifications.
        
     
    
        
            Electrical System:
        
        
            Wiring harness, battery, ignition system components (CDI, coil), lights (headlight, taillight, indicators), horn, starter motor, generator/alternator.
        
     
    
        
            Controls Cables:
        
        
            Throttle cables, clutch cables, brake cables, gear shift linkage, control levers.
        
     
    
        
            Bodywork Fittings:
        
        
            Fuel tank, seat, side covers, fenders, chain guard, mirrors, footpegs, fairings (if applicable).
        
     
    
        
            Exhaust System:
        
        
            Exhaust pipe, muffler, exhaust gaskets.
        
     
    
    
        
            Part Identification:
        
        
            Detailed exploded diagrams clearly labeling each part with its corresponding Yamaha part number.
        
     
    
        
            Assembly Relationships:
        
        
            Visual representation of how individual parts and sub-assemblies fit together.
        
     
    
        
            Component Listing:
        
        
            Comprehensive list of all parts for each system with descriptions and quantities.
        
     
    
        
            Substitutions Notes:
        
        
            Information on interchangeable parts or superseded part numbers.
        
     
    
    
        
            Depth Level:
        
        
            Parts identification and enumeration; does not contain repair or diagnostic procedures.
        
     
 
    
    
    
        
            Type:
        
        
            Four-stroke, SOHC, 2-valve, single-cylinder.
        
     
    
        
            Cooling System:
        
        
            Air-cooled.
        
     
    
        
            Displacement:
        
        
            124 cc (typically).
        
     
    
        
            Bore X Stroke:
        
        
            Approx. 52.0 mm x 47.2 mm (varies by specific sub-model).
        
     
    
    
        
            Horsepower:
        
        
            Approximately 10-11 HP @ 7500-8000 RPM (varies by market and year).
        
     
    
        
            Torque:
        
        
            Approximately 9-10 Nm @ 6000-6500 RPM (varies by market and year).
        
     
    
    
        
            Carburetor:
        
        
            Mikuni VM22 or similar (carbureted models). Some later/specific markets may feature fuel injection (FI).
        
     
    
        
            Fuel Tank Capacity:
        
        
            Approximately 13 Liters.
        
     
    
    
        
            Oil Type:
        
        
            SAE 10W-40 API SG or higher (e.g., Yamalube 4G).
        
     
    
        
            Oil Capacity:
        
        
            Approx. 1.0 L (without filter change), 1.1 L (with filter change).
        
     
    
    
        
            Ignition Type:
        
        
            TCI (Transistor Controlled Ignition) or CDI.
        
     
 
    
    
    
        
            Crash Test Results:
        
        
            Motorcycles of this class typically do not undergo standardized automotive crash testing. Safety relies on rider skill and protective gear.
        
     
    
    
        
            Braking System:
        
        
            Front disc brake, rear drum brake (standard on most models, some variants may have rear disc).
        
     
    
    
        
            Frame Construction:
        
        
            Steel diamond frame for rigidity and rider protection.
        
     
    
        
            Lighting:
        
        
            Halogen headlight, LED taillight and indicators on some newer models.
        
     
    
    
        
            Recommended Gear:
        
        
            Helmet, riding jacket, gloves, sturdy trousers, and boots.
        
     
 
    
    
    
        
            Instrument Cluster:
        
        
            Typically analog speedometer with a digital or analog tachometer, fuel gauge, odometer, and trip meter.
        
     
    
    
        
            ABS:
        
        
            ABS is generally not a standard feature on most YBR 125 models, particularly older or base variants. Some newer or specific market versions might offer it as an option.
        
     
    
    
        
            Smartphone Integration:
        
        
            N/A. No native smartphone integration or advanced electronic rider aids.
        
     
    
    
        
            Headlight Type:
        
        
            Halogen H4 bulb for primary illumination.
        
     
 
    
    
    
        
            Oil Change:
        
        
            Every 3,000 km or 6 months (whichever comes first).
        
     
    
        
            Air Filter Cleaning:
        
        
            Every 3,000 km.
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 10,000 km (or as per manual for specific plug type).
        
     
    
        
            Valve Clearance Check:
        
        
            Every 6,000 km.
        
     
    
        
            Chain Lubrication Adjustment:
        
        
            Every 1,000 km or after washing/rain.
        
     
    
    
        
            Engine Oil:
        
        
            SAE 10W-40 API SG or higher (Yamalube 4G recommended).
        
     
    
        
            Brake Fluid:
        
        
            DOT 3 or DOT 4 (for models with disc brakes).
        
     
    
        
            Coolant:
        
        
            N/A (Air-cooled engine).
        
     
    
    
        
            Carburetor Performance:
        
        
            Can be sensitive to altitude and temperature changes, occasional tuning may be required. Carburetor jetting might need adjustment for aftermarket exhaust or air filter modifications.
        
     
    
        
            Chain Wear:
        
        
            Regular lubrication and adjustment are crucial to prevent premature chain and sprocket wear.
        
     
    
        
            Suspension:
        
        
            Basic suspension components may offer limited adjustability and damping, leading to a firm ride on rough surfaces for some riders.
        
     
    
    
        
            Yamaha Part Numbering:
        
        
            Yamaha uses a 9-digit alphanumeric part numbering system (e.g., 5YP-xxxxxx-xx) which is critical for accurate part sourcing.
        
     
 
    
    
    
        
            Manufacturer:
        
        
            Yamaha Motor Corporation, Japan.
        
     
    
        
            Reputation:
        
        
            Globally recognized for innovation, performance, and reliability across motorcycles, musical instruments, and other powered products.
        
     
    
    
        
            Introduction Year:
        
        
            The YBR 125 series has been in production since the early 2000s, evolving with design updates and emissions standards.
        
     
    
        
            Key Changes:
        
        
            Significant updates often include cosmetic styling, minor engine tuning for emissions, and updates to lighting or braking systems.
        
     
    
        
            Variants:
        
        
            Common variants include the YBR125 (naked), YBR125 Custom (cruiser styling), and YBR125G (with a small fairing).
        
     
    
    
        
            Manufacturing Locations:
        
        
            Primarily manufactured in various Yamaha facilities, including in India and other Asian markets for global distribution.