Segment:
Sport Touring Motorcycle
Target Audience:
Riders seeking a comfortable, reliable, and capable motorcycle for commuting, touring, and general riding.
Key Competitors:
Honda CB750, Kawasaki GTR1000, Suzuki GSX1100G (air-cooled variants).
Engine Layout:
In-line four-cylinder, air-cooled engine.
Drivetrain:
Shaft drive for low maintenance and smooth power delivery.
Suspension Setup:
Monoshock rear suspension for improved handling and adjustability.
Ergonomics:
Comfortable riding position suitable for longer distances.
Engine:
Comprehensive coverage including disassembly, inspection, assembly, tuning, and troubleshooting of the engine.
Fuel System:
Carburetor overhaul and adjustment (likely Mikuni CV type), fuel pump, fuel lines, and tank.
Ignition System:
CDI ignition system components, timing, spark plugs, and troubleshooting.
Transmission:
Clutch operation, gearbox overhaul, gear selection mechanism, and lubrication.
Drivetrain:
Shaft drive system maintenance, universal joints, final drive housing, and lubrication.
Suspension:
Front fork (telescopic) inspection, seal replacement, oil levels, and rear monoshock absorber adjustment and service.
Brakes:
Front and rear brake systems, caliper overhaul, master cylinders, brake fluid, pad replacement, disc inspection, and bleeding procedures.
Electrical System:
Wiring diagrams, battery, charging system (alternator, regulator/rectifier), starter motor, lighting, instruments, and switches.
Cooling System:
Air-cooled engine design, but may cover related components like oil coolers if equipped.
Frame And Bodywork:
Chassis inspection, fairing removal and installation, seat, fuel tank mounting, and related hardware.
Wheels And Tires:
Wheel bearing inspection and replacement, tire fitting and pressure recommendations.
Preventative Maintenance:
Detailed guides for routine servicing, oil changes, filter replacements, and general inspections.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon problems, symptom analysis.
Repair And Overhaul:
Step-by-step instructions for complete disassembly, repair, and reassembly of all major components.
Component Replacement:
Specific guidance on replacing wear items such as brake pads, tires, batteries, and filters.
Adjustments:
Carburetor synchronization, valve clearance adjustment, chain tension (if applicable, though shaft drive), and brake lever free play.
Wiring Diagrams:
Complete electrical schematics for troubleshooting and component identification.
Depth:
Extremely comprehensive, covering everything from basic user maintenance to full engine and gearbox rebuilds.
Diagnostics:
Detailed diagnostic flowcharts and symptom-based troubleshooting guides for electrical and mechanical issues.
Rebuild Specifications:
Includes critical tolerance specifications, torque values, and assembly sequences for all major engine and chassis components.
Engine Type:
Air-cooled, 4-stroke, DOHC, inline-four cylinder
Displacement:
892 cc (892 cubic centimeters)
Bore X Stroke:
73.0 mm x 51.5 mm
Horsepower:
Approximately 80-90 PS (59-66 kW) at 8,000 rpm (varies by market and tuning).
Torque:
Approximately 75-80 Nm (55-59 lb-ft) at 7,000 rpm (varies by market and tuning).
Carburetor Type:
Likely Mikuni BS32 (Butterfly Spigot) 32mm constant velocity carburetors (4 units).
Fuel Capacity:
Approximately 21 Liters (5.5 US gallons).
Oil Capacity:
Approximately 3.4 Liters (3.6 US quarts) with filter change.
Oil Type Specification:
Yamaha recommends SAE 20W-40 or SAE 10W-30 API SE, SF, SG, SH or SJ Service Classification. Check manual for specific viscosity based on temperature.
Infotainment System:
N/A (No integrated infotainment system; typical for motorcycles of this era).
Driver Assistance Features:
N/A (Motorcycle-specific; features like ABS were not standard on most XJ900G models).
Connectivity Features:
N/A
Instrument Panel:
Analog speedometer, tachometer, fuel gauge, coolant temperature gauge (if applicable, likely not for air-cooled), and warning lights.
Oil Change Interval:
Recommended every 4,000-6,000 km (2,500-3,700 miles) or annually, whichever comes first. Consult manual for exact intervals.
Valve Clearance Interval:
Typically every 12,000-16,000 km (7,500-10,000 miles). Manual is essential for exact figures.
Spark Plug Replacement:
Recommended at 12,000-16,000 km (7,500-10,000 miles) or based on wear inspection.
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for specific recommendation).
Final Drive Oil Type:
Hypoid gear oil, SAE 80W-90 API GL-5.
Fork Oil Type:
Yamaha Suspension Oil (or equivalent SAE 10W fork oil is common).
Common Wear Items:
Fork seals, clutch plates (with high mileage), carburetor diaphragm wear, and exhaust system corrosion.
Potential Electrical Issues:
Age-related deterioration of wiring insulation, stator or regulator/rectifier failure can occur on older units.
Carburetor Cleaning And Sync:
Essential for smooth running, especially after storage or if issues arise.
Shaft Drive Maintenance:
Regularly check and change the final drive oil as per the manual's schedule.
Brand History Focus:
Yamaha's long-standing reputation for building reliable and performance-oriented motorcycles.
Xjn Series Context:
The XJ900G is part of Yamaha's long-running XJ series, known for its transverse four-cylinder engines and shaft drive, evolving from earlier models like the XJ650 and XJ750.
Generation Characteristics:
This generation (1995-2001) often featured updated styling, including the 'Diversion' fairing in many markets, enhancing its sport-touring capabilities.
Manufacturing Location:
Japan (primarily)
