Segment:
Entry-level, lightweight commuter motorcycle, popular for its reliability and fuel efficiency.
Competitors:
Competes with other 125cc commuter motorcycles from brands like Honda (CBF125), Suzuki (GS125), and Kawasaki (KLR250 - though larger, targets similar utility buyers).
Value Proposition:
Offers an inexpensive way to maintain and repair the Yamaha YBR125/YBR125ED, ensuring longevity and optimal performance.
Instructional Style:
Step-by-step instructions, numbered instructions, and highlighted figure numbers for easy comprehension.
Main Coverage:
Complete service and repair for Yamaha YBR125 and YBR125ED models from 2005-2010.
Specific Systems:
General Information, Engine Mechanical, Engine Electrical, Emission Control, Fuel System, Suspension, Clutch, Manual Transaxle, Driveshaft and Axle, Steering, Brakes, Body Interior/Exterior, Body Electrical, Restraint System.
Estimated Page Count:
Estimated to be comprehensive; actual count not specified but implied to be extensive given detailed coverage.
Type:
Workshop Service Repair Manual (Factory Service Manual equivalent).
Delivery Method:
Instant Download
Engine Mechanical:
Detailed coverage of engine disassembly, assembly, inspection, and repair procedures for all internal components.
Engine Electrical:
Comprehensive diagnostics and repair for ignition system, charging system, starting system, and electrical component troubleshooting.
Fuel System:
Coverage of fuel injection (if applicable to specific models within the range) or carburetion system, fuel pump, and related components.
Suspension System:
Repair and maintenance of front forks, rear shock absorber, and associated linkages.
Brake System:
Service and repair of front and rear braking systems, including hydraulic components and pad replacement.
Body Electrical:
Detailed wiring diagrams and troubleshooting for lighting, instruments, switches, and other electrical accessories.
Maintenance:
Routine maintenance tasks such as oil changes, filter replacements, chain adjustment, and spark plug checks.
Troubleshooting:
Step-by-step diagnostic procedures for identifying and resolving common and uncommon faults across all vehicle systems.
Repair:
Detailed instructions for component replacement, overhaul, and repair of all major vehicle systems.
Diagnostics:
Combined troubleshooting and electrical service procedures with detailed wiring diagrams for effective fault finding.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine rebuilds and complex electrical diagnostics.
Target Audience:
Suitable for DIY enthusiasts and experienced professional mechanics.
Accessibility:
Searchable text within PDF is highly probable for efficient information retrieval.
Printability:
Fully Printable pages for workshop convenience.
Image Quality:
Detailed illustrations, diagrams, and photos designed for clear visual guidance.
Binding:
Digital (PDF) - No physical binding.
Paper:
Not applicable to digital format.
Reader:
Adobe PDF Reader required.
Compression:
WinZip or equivalent required for file extraction (if applicable).
Operating Systems:
Compatible with all versions of Windows and Mac.
Engine Type:
4-stroke, SOHC, 2-valve, air-cooled, single-cylinder (typical for YBR125 series).
Displacement:
Approximately 124cc (exact figure may vary slightly by year/market, but this is standard for the YBR125).
Bore X Stroke:
Typically around 54.0 mm x 54.5 mm (refer to manual for exact specifications).
Compression Ratio:
Generally around 10.0:1 (refer to manual for exact specifications).
Horsepower:
Around 10-12 HP at 7500-8000 RPM (exact figures may vary by market and year, refer to manual).
Torque:
Around 9-10 Nm at 6500-7000 RPM (exact figures may vary by market and year, refer to manual).
Fuel Delivery:
Likely uses a Carburetor (e.g., Mikuni BS26 or similar) for this generation, though some later YBR models introduced fuel injection. Manual will specify.
Fuel Type:
Unleaded gasoline.
Fuel Tank Capacity:
Typically around 13 liters (refer to manual for precise capacity).
Type:
5-speed constant mesh, returning system.
Type:
Not applicable, this model is consistently manual transmission.
Clutch Type:
Wet, multiple-disc clutch.
Overall Length:
Approx. 2005 mm (refer to manual for exact dimensions).
Overall Width:
Approx. 705 mm (refer to manual for exact dimensions).
Overall Height:
Approx. 1075 mm (refer to manual for exact dimensions).
Wet Weight:
Approx. 123 kg (refer to manual for exact weight).
Dry Weight:
Approx. 110 kg (refer to manual for exact weight).
Front Tire Size:
Typically 2.75-18 42P (refer to manual for exact specifications).
Rear Tire Size:
Typically 100/80-18 M/C 59P (refer to manual for exact specifications).
Crash Safety:
Not rated by agencies like NHTSA or IIHS as it is a motorcycle. Safety is dependent on rider skill and adherence to traffic laws.
Braking:
Front disc brake, rear drum brake (typical for this model range, check manual for specific variations).
Lighting:
Headlight, taillight, brake lights, turn signals.
Instrument Cluster:
Analog speedometer, odometer, fuel gauge, and indicator lights. Some models might feature a digital clock or trip meter.
ABS:
Anti-lock Braking System (ABS) is typically not a standard feature on the YBR125 models of this era, but the manual will detail the standard braking system.
Charging Port:
No integrated USB or charging ports typically found on models of this vintage. Aftermarket options may exist.
Oil Change:
Typically every 3,000 - 4,000 km or 6 months (refer to manual for precise interval and specific oil type).
Air Filter Cleaning:
Recommended every 4,000 - 6,000 km or annually (refer to manual).
Spark Plug Replacement:
Typically every 8,000 - 10,000 km (refer to manual for specific plug type and gap).
Chain Lubrication Adjustment:
Recommended every 1,000 km or after riding in wet conditions, and adjust as needed (refer to manual for specific slack).
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 20W-40 API Service SE, SF, SG or higher (refer to manual for precise viscosity and API rating).
Engine Oil Capacity:
Approx. 1.2 L without filter change, 1.4 L with filter change (refer to manual for exact capacity).
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for specific recommendation).
Common Wear Items:
Clutch plates, brake pads, chain and sprockets, tires, spark plugs, and air filters are typical wear items requiring periodic replacement.
Electrical Gremlins:
Intermittent issues with switches or wiring connections can occur, addressable with the manual's wiring diagrams.
Carburetor Tuning:
Carburetors may require periodic cleaning and adjustment for optimal performance, especially with varying fuel quality.
Yamaha Legacy:
Yamaha Motor Corporation is a world-renowned manufacturer of motorcycles, marine products, and other powered equipment, known for innovation and quality since its founding in 1955.
Ybr Series:
The YBR125 series is part of Yamaha's popular line of lightweight motorcycles designed for commuting and general utility. It has seen consistent updates to meet emissions standards and improve performance over its production run.
Manufacturing Origin:
Typically manufactured in various Yamaha global facilities, often including India and other Asian markets for this segment.