Segment:
Entry-level to mid-range sportbike/naked bike segment
Competitors:
Likely competes with similar displacement models from Kawasaki (e.g., Ninja 250), Honda (e.g., CBR250R), Suzuki (e.g., GS500F in some markets).
Target Audience:
Beginner riders, commuters, riders seeking an affordable and practical performance motorcycle.
Design Philosophy:
Balanced performance, reliability, and user-friendliness for everyday riding.
Engine:
Engine assembly, disassembly, inspection, overhaul, lubrication, cooling, fuel, ignition, exhaust systems.
Transmission:
Transmission operation, inspection, maintenance, repair, clutch system.
Chassis:
Frame, suspension (front and rear), steering system, wheels, tires.
Brakes:
Brake system operation, hydraulic system, disc brake components, maintenance, bleeding.
Electrical:
Electrical system overview, battery, charging system, ignition system, lighting, instrumentation, wiring diagrams.
Body:
Body panels, fairings, seat, fuel tank, fenders, minor body repairs.
Maintenance:
Scheduled maintenance, routine inspections, lubrication, filter replacement, fluid changes.
Troubleshooting:
Diagnostic procedures for common and uncommon problems, symptom-based troubleshooting charts.
Repair:
Step-by-step repair instructions for all major components and systems, including detailed disassembly and reassembly.
Rebuilding:
Comprehensive instructions for engine and transmission rebuilds, including component specifications and tolerances.
Refurbishment:
Guidance on restoring components, parts cleaning, and surface preparation.
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission overhauls.
Diagnostic Level:
Advanced diagnostic procedures, including electrical system testing and component identification.
Special Tools:
Identification and usage instructions for specialized tools required for specific repairs.
Configuration:
Parallel-twin, four-stroke, DOHC, 4 valves per cylinder (Typical for this class)
Displacement:
Approximately 249cc (Typical for BR250 models)
Bore X Stroke:
Likely around 54.0 mm x 54.5 mm (Standard for this displacement range)
Cooling System:
Liquid-cooled
Horsepower:
Estimated 30-35 HP @ 10,000-11,000 RPM (Typical for class)
Torque:
Estimated 16-18 lb-ft @ 8,000-9,000 RPM (Typical for class)
Induction:
Fuel Injection (DFI) - likely dual throttle bodies
Fuel Type:
Unleaded gasoline, 87 octane (minimum)
ECU:
Engine Control Unit (ECU) with diagnostic capabilities.
Length:
Approximately 2,000 mm (Specific to model variant)
Width:
Approximately 720 mm (Specific to model variant)
Height:
Approximately 1,050 mm (Specific to model variant)
Dry Weight:
Around 140-150 kg (Specific to model variant)
Wet Weight:
Around 160-170 kg (With fluids)
Payload Capacity:
Typically 150-200 kg for rider and passenger.
Crash Test Results:
N/A (Motorcycles are not typically rated by NHTSA/Euro NCAP)
Braking System:
Front and rear disc brakes. ABS typically not standard on this class/year.
Lighting:
Halogen headlight, LED taillight (common for this era).
Frame Construction:
Steel diamond frame for rigidity and rider support.
Ergonomics:
Designed for upright riding posture, improving rider control and comfort.
Oil Change:
Every 6,000 km (3,700 miles) or 6 months, whichever comes first.
Air Filter:
Inspect every 6,000 km, replace as needed. Clean at 12,000 km.
Spark Plug:
Replace every 12,000 km.
Chain Maintenance:
Lubricate and adjust chain tension every 1,000 km.
Engine Oil:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher.
Engine Oil Capacity:
Approx. 1.7 L (0.45 US gal) without filter change, 1.9 L (0.50 US gal) with filter change.
Coolant:
Yamaha Engine Coolant (or equivalent) 50% ethylene glycol mixture with deionized water.
Brake Fluid:
DOT 4 hydraulic brake fluid.
Common Wear Items:
Clutch plates, chain and sprockets, brake pads, fork seals due to regular use.
Electrical Quirks:
Potential for rectifier/regulator failure (common in some Yamaha models of this era), check stator output.
Engine Performance:
Minor carburetor synchronization issues (if applicable to specific sub-models or older versions) or fuel injector cleaning needs.
Yamaha Legacy:
Yamaha Motor Company is a global leader in motorcycles, known for innovation, performance, and reliability across various segments.
Br250 Lineage:
The BR250 platform has historically been Yamaha's offering in the lightweight sportbike/naked segment, evolving through various iterations focusing on fuel efficiency and approachable performance.
Manufacturing Location:
Likely manufactured in Japan or Southeast Asia by Yamaha.
Production Years:
The BR250 model has been produced across several years, with the 2007 model representing a specific iteration within its lifecycle.
