Category:
Sportbike / Naked Bike
Target Audience:
Owners and independent repair shops seeking in-depth maintenance and repair information.
Comparison:
Competes with similar displacement naked bikes and entry-level sportbikes from Japanese manufacturers.
Vehicle Appeal:
Agile handling, accessible performance, and characteristic Yamaha reliability.
Manual Value Proposition:
Enables DIY maintenance and repairs, saving on labor costs and ensuring proper upkeep of the vehicle.
Diagnostic Procedures:
Comprehensive troubleshooting guides, fault code interpretation, diagnostic connector locations.
Mechanical Repairs:
Engine overhaul, transmission disassembly/assembly, suspension and steering component replacement, brake system service.
Electrical Systems:
Wiring diagrams, component testing, charging system diagnostics, ignition system troubleshooting.
Type:
Full Service & Repair Manual
Engine Mechanical:
Cylinder head, valves, camshafts, pistons, connecting rods, crankshaft, lubrication system, cooling system, fuel injection system.
Engine Electrical:
Ignition system, starter motor, alternator, battery, ECU, sensors (crankshaft position, camshaft position, throttle position, oxygen), wiring harness.
Transmission Drivetrain:
Gearbox overhaul, clutch system, drive shafts, differential, final drive.
Brakes:
Brake system diagnostics, front and rear brake caliper service, master cylinder overhaul, brake fluid replacement, ABS system (if applicable).
Suspension Steering:
Front fork assembly, rear shock absorber, steering head bearings, linkage components, wheel bearing service.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel injectors, fuel pressure regulator.
Exhaust System:
Exhaust manifold, catalytic converter, muffler, lambda sensor replacement.
Electrical Components:
Lighting system, horn, indicators, battery charging system, instrumentation.
Maintenance Tasks:
Oil changes, filter replacements, spark plug service, air filter cleaning/replacement, chain adjustment, lubrication points.
Rebuild Procedures:
Complete engine rebuild, transmission overhaul, carburetor/fuel injection cleaning and adjustment, suspension damper rebuilding.
Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon issues, electrical fault finding charts.
Technical Specifications:
Torque values for all fasteners, engine clearances, electrical system voltages, fluid capacities.
Special Tools:
Identification of required special tools for specific repair procedures.
Depth:
Comprehensive from basic maintenance to full engine and transmission rebuilds, including electrical diagnostics.
Detail Level:
Detailed, step-by-step instructions with accompanying diagrams and illustrations.
Engine Type:
Liquid-cooled, four-stroke, DOHC, parallel-twin
Bore X Stroke:
54.0 mm x 54.5 mm
Compression Ratio:
12.0:1
Carburetion:
Mikuni BSR32 x 2 (or similar EFI in some markets/later iterations)
Horsepower:
Approx. 30-32 HP (at crankshaft)
Torque:
Approx. 22-24 Nm (at crankshaft)
Fuel Delivery:
Fuel Injection (if applicable, check specific market variant for carburetion)
Fuel Type:
Unleaded gasoline
Oil Type:
Yamalube 4-stroke motorcycle oil, SAE 10W-40 or 20W-50 (refer to manual for exact specification)
Coolant Type:
Yamaha-recommended antifreeze coolant mixture (50/50 ethylene glycol)
Transmission Type:
Constant mesh, 6-speed
Clutch Type:
Wet, multiple disc
Optional Features:
N/A (standard configuration)
Gear Ratios:
Refer to manual for specific gear ratios (e.g., 1st: 2.833, 2nd: 1.944, 3rd: 1.500, 4th: 1.238, 5th: 1.045, 6th: 0.913)
Transmission Fluid Type:
Yamalube Gear Oil (or equivalent motorcycle-specific gear oil)
Display:
Analog tachometer, digital speedometer, odometer, trip meters, fuel gauge, clock.
ABS:
ABS was generally an optional feature or not available on this specific model year in most markets; verify vehicle specification.
Connectivity Features:
N/A (Basic instrumentation, no modern connectivity features).
Oil Change:
Every 4,000 km or 4 months, whichever comes first (refer to manual for exact interval and conditions).
Air Filter:
Inspect every 4,000 km, clean/replace as needed.
Spark Plugs:
Replace every 12,000 km or as per manual specification (e.g., NGK CR9E or equivalent).
Chain Maintenance:
Lubricate and adjust chain every 1,000 km or after washing/rain.
Engine Oil Capacity:
Approx. 1.8 Liters (without filter change), 2.0 Liters (with filter change).
Coolant Capacity:
Approx. 1.3 Liters.
Common Wear Items:
Clutch wear, chain and sprockets wear, brake pad wear, fork seal leaks, steering head bearing adjustment/replacement.
Electrical Gremlins:
Occasional issues with charging system components (stator, regulator/rectifier) or wiring harness connections due to vibration or age.
Carburetor Issues:
If carbureted, potential for gumming up if fuel is left standing for long periods, requiring cleaning and synchronization.
Manufacturer Reputation:
Yamaha Motor Company is renowned for its high-quality engines, innovative designs, and sporting heritage in motorcycles and other powersports.
Series Introduction:
The BR250 is part of Yamaha's FZR/YZF lineage, adapted into a more upright, naked sportbike configuration, offering a balance of performance and everyday usability.
Production Period:
The BR250 model line generally spanned from the late 1990s through the mid-2000s, with the 2004 model being a refinement of earlier iterations.
Manufacturing Location:
Primarily manufactured in Japan.
