🏷️ Basic Information Identification Make: BMW Model: R 1150 GS Year: 1998 Codes Internal Model Code: R21 👋 Introduction Market Position Segment: Adventure Touring Motorcycle Reputation: Renowned for its versatility, durability, and capability for long-distance travel and off-road excursions. Competitive Analysis Competitors Circa 1998: Honda Africa Twin, Yamaha Super Tenere, Triumph Tiger, Suzuki V-Strom (later models). Key Features Engine Configuration: Boxer-twin, air/oil-cooled Drivetrain: Shaft drive Suspension: BMW's signature Telelever front suspension for improved handling and comfort. 📋 Manual Details Coverage Areas Primary Coverage: Repair and Service Secondary Coverage: Maintenance, Troubleshooting, Diagnostics Page Count Estimated Pages: Comprehensive (specific count not provided, but typical for a full service manual is 500+ pages) Manual Type Type: Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Detailed overhaul, component testing, tuning, fuel injection system (BMS-K/D), ignition system, exhaust system. Transmission: Clutch, gearbox operation, maintenance, repair, final drive, driveshaft, lubrication. Chassis: Frame, suspension (Telelever front, Paralever rear), steering, wheels, tires. Electrical System: Wiring diagrams, lighting, battery, alternator, starter, ABS II, instrument cluster, electronic control units (ECUs). Brakes: Hydraulic system, ABS II operation and maintenance, brake pad replacement, rotor inspection, bleeding procedures. Fuel System: Fuel pump, injectors, pressure regulator, fuel filter replacement, tank maintenance. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, valve clearance checks, lubrication points. Troubleshooting: Diagnostic procedures for common and uncommon faults, error code interpretation (where applicable). Repair Procedures: Step-by-step instructions for engine disassembly/reassembly, transmission overhaul, suspension component replacement, electrical component repair. Diagnostic Procedures: Fault finding using visual inspection, measurement tools, and potentially diagnostic equipment (if covered). Technical Depth Depth: Professional technician level, suitable for complete engine rebuilds, advanced electrical diagnostics, and complex component replacements. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Likely text-searchable if properly generated from a digital source. Print Quality Resolution: Dependent on original source, typically clear enough for print reproduction. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Type: Four-stroke Boxer-twin Displacement: 1130 cc Bore X Stroke: 98 mm x 74.5 mm Cooling System: Air/oil-cooled Valve Train: 2 valves per cylinder, Overhead Camshaft (OHC), actuated by pushrods and rockers. Performance Horsepower: Approx. 95 hp @ 7250 rpm Torque: Approx. 98 Nm (72 lb-ft) @ 5500 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), Bosch Motronic BMS-K/D Fuel Type: Unleaded gasoline, minimum 91 RON Lubrication Oil Type: SAE 20W-40 or SAE 15W-50 motorcycle-specific oil Oil Capacity: Approx. 4.0 liters (with filter change) 🔧 Transmission Standard Type: 6-speed manual gearbox Clutch: Single dry plate, diaphragm spring Final Drive: Shaft drive to rear wheel Features Gear Ratios: Refer to manual for specific ratios (typical for adventure bikes). Transmission Oil: SAE 75W-90 GL-5 gear oil Transmission Oil Capacity: Approx. 0.25 liters (gearbox), refer to manual for final drive oil. 📐 Dimensions Exterior Length: Approx. 2230 mm (87.8 in) Width: Approx. 915 mm (36.0 in) (at handlebars) Height: Approx. 1435 mm (56.5 in) (at seat) Wheelbase: Approx. 1487 mm (58.5 in) Weights Dry Weight: Approx. 230 kg (507 lbs) Gross Vehicle Weight Rating: Refer to manual for specific GVWR. Fuel Capacity Fuel Tank Capacity: 25 liters (6.6 US gal) including a 4-liter reserve. 🛡️ Safety Features Ratings Safety Features Rating: N/A for motorcycles in the same manner as cars. Active Features ABS: Optional BMW Motorrad Integral ABS II (anti-lock braking system). Brakes Front: Dual 305mm discs with 4-piston calipers. Brakes Rear: Single 276mm disc with 2-piston caliper. Passive Features Lighting: Halogen headlight, LED taillight, turn signals. Chassis Design: Sturdy frame and suspension designed for stability and control. 💡 Technology Features Infotainment Infotainment System: N/A (Basic instrumentation, focus on function over entertainment). Driver Assistance ABS System: Integral ABS II (optional) - advanced for its time, integrating front and rear brake actuation. Connectivity Diagnostic Ports: Diagnostic connector for electronic troubleshooting (e.g., with BMW diagnostic tools). Instrumentation Instrument Cluster: Analog speedometer and tachometer, LCD display for fuel level, odometer, clock, gear indicator (if equipped), warning lights. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000 km or annually, whichever comes first. Valve Clearance Check: Typically every 20,000 km. Spark Plug Replacement: Refer to manual, often around 20,000-40,000 km depending on plug type. Fluid Specifications Engine Oil Spec: SAE 20W-40 or SAE 15W-50 Motorcycle-specific. Brake Fluid Spec: DOT 4 (High-temperature racing fluid recommended for best performance). Transmission Oil Spec: SAE 75W-90 GL-5 Gear Oil. Known Issues Common Wear Items: Clutch wear, driveshaft splines lubrication, Telelever dust seals, alternator rotor failure (in some years). Electrical Gremlins: Can be prone to minor electrical faults if not properly maintained or modified; manual aids diagnosis. Maintenance Schedule Availability Schedule Detail: Manual provides detailed, mileage-based, and time-based service schedules. 📚 Vehicle History Brand Heritage Manufacturer: Bayerische Motoren Werke AG (BMW) Motorcycle Division History: BMW has a...