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Manual Details
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Coverage Areas
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Systems Covered:
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Engine, Transmission, Drivetrain, Fuel System, Ignition System, Cooling System, Exhaust System, Chassis, Suspension, Brakes, Electrical System, Lighting, Instruments, Bodywork, Maintenance, Troubleshooting, Repair Procedures, Specifications.
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Page Count
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Page Count:
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Comprehensive (exact page count not specified, but implied to be extensive for a full service repair manual)
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Manual Type
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Manual Type:
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Full Service Repair Manual
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Language
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Language:
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English
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Format
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Format:
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PDF Download
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Manual Coverage
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Systems Covered
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Engine:
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Detailed disassembly, assembly, inspection, and repair of all engine components including cylinder head, valves, pistons, crankshaft, camshaft, lubrication system, and cooling system. Includes specifications for clearances and tolerances.
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Transmission Drivetrain:
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Covers clutch operation, gearbox disassembly and reassembly, shift mechanism, final drive, and lubrication. Includes gear ratios and component inspections.
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Fuel System:
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Detailed information on carburetor(s) (type and specifications), fuel pump, fuel lines, and fuel tank. Includes jetting specifications, float level adjustment, and troubleshooting.
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Ignition System:
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Covers ignition timing, spark plugs, ignition coil, CDI unit, and related wiring. Includes troubleshooting for ignition failures.
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Brakes:
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Front and rear brake system service, including hydraulic fluid specifications, bleeding procedures, brake pad/shoe replacement, caliper/master cylinder overhaul, and drum brake adjustment.
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Suspension Steering:
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Front fork overhaul (oil type, level, and seals), rear shock absorber service, swingarm and linkage lubrication, steering head bearing adjustment, and wheel bearing service.
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Electrical Lighting:
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Wiring diagrams, component testing (stator, rectifier/regulator, battery, starter motor, lights, horn, turn signals), fuse box layout, and troubleshooting electrical faults.
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Procedures Included
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Maintenance:
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Routine maintenance tasks such as oil changes, filter replacement, spark plug replacement, chain adjustment and lubrication, brake adjustments, and general inspection.
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Troubleshooting:
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Systematic diagnostic procedures for common problems, including starting issues, poor performance, electrical malfunctions, and braking problems. Includes symptom-based troubleshooting guides.
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Repair Rebuild:
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Step-by-step instructions for complete engine and transmission overhauls, suspension component replacement, brake system repairs, and bodywork adjustments.
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Specifications Data:
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Torque specifications for all fasteners, fluid capacities, recommended fluid types, wear limits, electrical resistance values, and diagnostic parameters.
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Technical Depth
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Depth:
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Comprehensive, covering everything from basic rider maintenance to full engine rebuilds and electrical system diagnostics. Suitable for home mechanics and professional technicians.
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Engine Specifications
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Primary Engine
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Type:
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Four-stroke, Air-cooled, DOHC, Parallel-Twin
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Displacement:
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249 cc (Exact displacement may vary by specific market version)
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Bore X Stroke:
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Specifications would be detailed in the manual (e.g., 54.0 mm x 54.5 mm)
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Compression Ratio:
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Specifications would be detailed in the manual (e.g., 9.5:1)
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Performance
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Horsepower:
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Approx. 25-30 HP (Actual figures would be in the manual)
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Torque:
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Approx. 20-23 Nm (Actual figures would be in the manual)
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Fuel System
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Fuel Delivery:
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Carburetor(s) (e.g., Dual Mikuni VM series or similar)
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Fuel Type:
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Unleaded gasoline
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Lubrication System
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Oil Type:
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Yamalube or equivalent motorcycle-specific API SG or higher, JASO MA certified oil (e.g., 10W-40 or 20W-50 depending on climate)
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Cooling System
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Cooling Method:
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Air-cooled
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Dimensions
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Exterior
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Overall Length:
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Specifications would be detailed in the manual (e.g., ~2050 mm)
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Overall Width:
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Specifications would be detailed in the manual (e.g., ~750 mm)
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Overall Height:
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Specifications would be detailed in the manual (e.g., ~1080 mm)
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Wheelbase:
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Specifications would be detailed in the manual (e.g., ~1400 mm)
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Ground Clearance:
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Specifications would be detailed in the manual
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Weights
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Dry Weight:
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Specifications would be detailed in the manual (e.g., ~150-160 kg)
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Wet Weight:
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Specifications would be detailed in the manual (e.g., ~165-175 kg)
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Fuel Tank Capacity:
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Specifications would be detailed in the manual (e.g., ~14 liters including reserve)
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Maintenance
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Service Intervals
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Oil Change Interval:
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Every 3,000 - 5,000 km or 6 months, whichever comes first (refer to manual for exact interval).
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Air Filter Cleaning Replacement:
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Inspect every 3,000 km, clean or replace as needed. Replace every 10,000 - 15,000 km.
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Spark Plug Replacement:
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Replace every 8,000 - 12,000 km or as per manual recommendations. Check gap regularly.
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Chain Lubrication Adjustment:
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Lubricate every 500-1000 km and adjust tension as needed. Check for wear.
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Brake Fluid Flush:
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Flush and replace every 2 years (or as per manual) regardless of mileage.
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Fluid Specifications
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Engine Oil Capacity:
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Specifications would be detailed in the manual (e.g., approx. 1.8 - 2.0 liters with filter change).
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Fork Oil Type Capacity:
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Yamaha Fork Oil G10 or equivalent, specific level detailed in the manual (e.g., 135 mm from top of inner tube with fork compressed and spring removed).
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Brake Fluid Type:
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DOT 3 or DOT 4 (check manual for specific requirement).
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Known Issues
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Common Wear Items:
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Clutch wear, chain and sprockets wear, fork seal leaks, carburetor jetting degradation, starter motor brushes. Regular maintenance is key to longevity.
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Electrical Issues:
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Potential for aging wiring harness connections, rectifier/regulator failure, or battery degradation over time. The manual's troubleshooting section is crucial here.
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Vehicle History
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Brand Heritage
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Yamaha Heritage:
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Yamaha Motor Corporation has a long and distinguished history in motorcycle manufacturing, known for innovation, performance, and reliability across various motorcycle segments, from sportbikes to cruisers and off-road vehicles.
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Model Evolution
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Br250 Lineage:
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The BR250 represents Yamaha's offering in the lightweight to mid-size naked motorcycle category. Models in this displacement class often serve as excellent entry points for new riders or as practical commuter bikes. Specific evolutionary steps for the BR250 are less documented publicly than larger Yamaha models, but it likely evolved from earlier Yamaha parallel-twin designs.
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Production
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Production Years:
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The 1999 model year indicates its production within that era. Yamaha typically produces models for several years with minor updates.
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Manufacturing Location:
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Yamaha motorcycles are produced globally, with significant manufacturing facilities in Japan, Indonesia, and other countries.
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