Model Nickname:
Virago 250 (commonly associated, though not explicitly stated in product info, a strong likelihood for a Yamaha V-twin cruiser of this era)
Production Years Covered:
1981-1990
Internal Model Code:
Likely '32R' or similar internal Yamaha designation for the BR250 model range during this period.
Category:
Lightweight cruiser motorcycle
Target Audience:
Riders seeking an accessible, stylish, and reliable motorcycle for city riding and casual touring.
Competitors:
Honda Rebel 250, Kawasaki Eliminator 250, Suzuki Savage 250, and other entry-level 250cc cruisers of the era.
Design Philosophy:
Classic cruiser styling with a manageable V-twin engine, focused on ease of use and reliability.
Engine Layout:
Air-cooled, 2-cylinder, V-twin configuration.
Covered Years:
1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990
Estimated Page Count:
Typically 300-500 pages for a full service manual of this era and complexity.
Type:
Full Service Repair Manual
Engine:
Detailed coverage of the V-twin engine, including disassembly, assembly, troubleshooting, and component specifications.
Fuel System:
Carburetor system (likely Mikuni VM series), fuel pump, fuel lines, fuel tank maintenance and repair.
Ignition System:
CDI (Capacitor Discharge Ignition) system, spark plugs, coils, timing adjustments.
Transmission:
Clutch operation, gear shifting mechanism, transmission disassembly and reassembly, lubrication.
Drivetrain:
Final drive (likely chain drive), sprocket replacement, chain adjustment and maintenance.
Suspension:
Front fork maintenance, seal replacement, oil levels, rear shock absorber inspection and replacement.
Brakes:
Front and rear brake system (likely drum or single disc front, drum rear), brake fluid replacement, caliper/drum maintenance, pad/shoe replacement.
Electrical System:
Wiring diagrams, battery maintenance, charging system (alternator/stator), lighting, starter motor, switches, fuses.
Chassis And Bodywork:
Frame inspection, body panel removal and installation, seat, handlebars, controls.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, chain adjustments, brake adjustments, lubrication points.
Troubleshooting:
Diagnostic procedures for common engine, electrical, and mechanical faults.
Repair Procedures:
Step-by-step guides for major component repairs and overhauls.
Disassembly Assembly:
Detailed instructions for taking apart and putting back together all major vehicle systems.
Technical Specifications:
Torque values, clearances, fluid capacities, electrical resistance values, engine timing specifications.
Depth:
Comprehensive, covering from basic maintenance to engine rebuilds and electrical system diagnostics.
Engine Type:
4-stroke, SOHC, V-twin
Displacement:
249 cc (approx.)
Bore X Stroke:
Typically around 49.0 mm x 66.0 mm for this displacement V-twin.
Compression Ratio:
Likely in the range of 9.7:1 to 10.0:1.
Horsepower Output:
Estimated 20-25 HP at around 8000 RPM.
Torque Output:
Estimated 15-18 lb-ft at around 6000 RPM.
Carburetion:
Twin Mikuni VM-series carburetors (e.g., VM22 or similar).
Fuel Type:
Unleaded gasoline
Cooling Method:
Air-cooled
Oil Capacity:
Approximately 1.8-2.0 liters (including oil filter).
Oil Type:
Yamaha recommends SAE 10W-40 API SE or SF, or equivalent motorcycle-specific oil.
Crash Test Results:
Not applicable to motorcycles of this era in the same way as cars.
Braking System:
Single front disc brake, rear drum brake for effective stopping power.
Lighting:
Headlight, taillight, brake light, turn signals for visibility.
Oil Change Interval:
Every 4,000-6,000 km or 6 months, whichever comes first.
Spark Plug Replacement:
Inspect every 12,000 km, replace as needed.
Chain Adjustment:
Check and adjust chain slack every 1,000-2,000 km.
Valve Clearance Check:
Inspect every 24,000 km.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Fork Oil:
Yamaha Fork Oil G-10 (or equivalent SAE 10W fork oil), quantity as specified in manual (typically 150-160ml per leg).
Carburetor Cleaning:
Mikuni carburetors can be prone to gumming up if fuel sits for extended periods, requiring regular cleaning and synchronization.
Electrical Connections:
Aging wiring and connectors can lead to intermittent electrical issues, requiring inspection and cleaning.
Clutch Cable:
Clutch cable wear and stretching can affect clutch engagement, requiring adjustment or replacement.
Suspension Seals:
Fork seals can degrade over time, leading to oil leaks.
