Target Audience:
Professional technicians and experienced DIY enthusiasts seeking detailed repair and maintenance information
Manual Value Proposition:
Provides same in-depth information as professional technician manuals, enabling comprehensive self-service and restoration
Instructional Clarity:
Numbered steps, bold figure references, detailed illustrations, inset diagrams for clarity
Information Organization:
Numbered table of contents for quick information retrieval, combined electrical diagnostics and wiring diagrams
Delivery:
Instant Download
Primary Coverage:
Full Service, Repair, Maintenance, Rebuild, Refurbishment, Restoration
Estimated Page Count:
Comprehensive (exact count not provided, but implies extensive detail)
Type:
Full Service Repair Manual
Engine:
Complete overhaul, diagnostics, tuning, lubrication, cooling system
Fuel System:
Carburetor(s) disassembly, cleaning, adjustment, fuel tank, fuel lines
Ignition System:
CDI, spark plugs, timing, electrical components
Transmission:
Gearbox disassembly, inspection, lubrication, shifting mechanisms
Drivetrain:
Chain, sprockets, rear wheel hub
Brakes:
Front and rear brake systems, hydraulic lines, master cylinder, calipers, brake pads/shoes
Suspension:
Front forks (oil, seals, springs), rear shock absorber, linkage
Steering:
Handlebars, triple clamps, steering stem bearings
Electrical System:
Wiring diagrams, lighting, battery, charging system, switches, sensors
Bodywork:
Frame, body panels, seat, fenders, graphics
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain lubrication, tire pressure checks
Troubleshooting:
Systematic diagnostics for common and uncommon issues, symptom-based troubleshooting
Repair:
Component-level repair and replacement procedures for all major systems
Rebuilding:
Detailed instructions for rebuilding major components like the engine and transmission
Diagnostics:
Comprehensive diagnostic procedures, including electrical system diagnosis
Depth:
Professional-level detail suitable for technicians and advanced DIY mechanics, covering full rebuilds and complex diagnostics
Compatibility:
All Windows and Mac versions
Printability:
Fully printable, all pages
Binding Description:
Digital (no physical binding)
Paper Description:
Digital (no physical paper)
Reader Requirement:
Adobe PDF Reader
Extraction Requirement:
WinRAR (for unzipping the downloaded file)
Engine Type:
Air-cooled, 4-stroke, SOHC, parallel-twin
Engine Displacement:
233 cc (exact displacement may vary slightly by specific sub-model, typically around 233cc for BR250)
Bore X Stroke:
54.0 mm x 50.6 mm (typical for this engine family)
Compression Ratio:
9.2:1 (typical)
Horsepower:
Approx. 20-23 PS (14.7-16.9 kW) @ 8,000 RPM (estimated, specific dyno figures vary)
Torque:
Approx. 1.8-2.0 kg-m (17.7-19.6 Nm) @ 7,000 RPM (estimated)
Carburetor Type:
Dual Mikuni VM24SS or similar
Fuel Type:
Unleaded gasoline, octane rating of 86 or higher recommended
Oil Type:
Yamalube 4 (or equivalent API SE, SF classification) SAE 10W-30, 10W-40, or 20W-40 motorcycle oil
Oil Capacity:
1.8 L (with oil filter change)
Transmission Type:
5-speed constant mesh
Gear Ratios:
1st: 2.750, 2nd: 1.875, 3rd: 1.381, 4th: 1.125, 5th: 0.917 (typical, subject to variation)
Clutch Type:
Wet, multi-disc
Final Drive:
O-ring sealed chain, 520 pitch
Transmission Oil:
Yamalube SAE 80 API GL-4 or equivalent
Transmission Oil Capacity:
0.55 L
Safety Standards:
Designed to meet relevant safety regulations for motorcycles of its era
Braking System:
Front: Hydraulic disc, Rear: Drum brake
Tires Rear:
120/90-17 64P
Lighting System:
Halogen headlight, taillight, turn signals
Infotainment Features:
N/A (basic motorcycle instrumentation)
Driver Assistance Systems:
N/A
Connectivity Features:
N/A
Dashboard Features:
Speedometer, Odometer, Tachometer, Indicator lights (turn signals, high beam, neutral, oil pressure)
Oil Change Interval:
Every 3,000 km or 6 months (recommendation, consult manual for exact)
Air Filter Cleaning:
Every 1,000 km or as needed based on riding conditions
Spark Plug Inspection:
Every 3,000 km, replace as needed
Chain Lubrication And Adjustment:
Every 500 km or as needed
Fork Oil Type:
Yamaha Suspension Oil (or equivalent SAE 10W)
Fork Oil Quantity:
139 ml per fork leg (typical, check manual)
Common Wear Items:
Carburetor internal wear, fork seal leaks, clutch wear, stator failure (common on older bikes)
Electrical Gremlins:
Wiring harness degradation over time, especially at stress points. Ensure proper grounds.
Carburetor Issues:
Can become clogged with age, requiring thorough cleaning and re-jetting if modifications were made.
Brand Focus:
Yamaha is renowned for its high-performance motorcycles, musical instruments, and marine products, with a strong history in motorsports.
Br250 Lineage:
The BR250 was part of Yamaha's range of versatile dual-sport or 'scrambler' style motorcycles, designed for both on-road and light off-road use. It offered a balance of manageable power and practical features.
Production Period:
1988-1996 (model covered is the 1988 iteration)
Manufacturing Location:
Likely Japan (common for Yamaha motorcycles of this era)
Industry Awards:
N/A (Specific awards not commonly documented for individual model years of this type of motorcycle)
Reliability Reputation:
Yamaha generally has a strong reputation for reliability, especially for their 4-stroke models of this era, provided regular maintenance is performed.
Regulatory Compliance:
Built to comply with manufacturing and emissions standards of its time.
