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Introduction
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Market Position
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Segment:
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Dual-sport / Adventure Touring Motorcycle
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Target Audience:
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Owners seeking to perform their own maintenance and repairs, enthusiasts, and independent workshops specializing in BMW motorcycles.
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Competitive Analysis
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Competitors:
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Honda Africa Twin, Yamaha XT660Z Ténéré, Triumph Tiger 955i, Moto Guzzi Quota.
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Key Features
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Vehicle Appeal:
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Renowned for its robustness, long-distance comfort, off-road capability, and characteristic BMW engineering.
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Manual Value Proposition
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Benefits:
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Empowers owners to maintain their R1150GS to the highest standard, save on labor costs, and gain a deeper understanding of their machine.
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Manual Coverage
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Systems Covered
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Engine:
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Complete engine overhaul, troubleshooting, diagnostics, and component replacement for the BMW R1150GS twin-cylinder Boxer engine.
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Transmission:
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Service and repair procedures for the 5-speed gearbox, clutch assembly, and final drive unit.
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Suspension:
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Detailed instructions for front Telelever and rear Paralever suspension systems, including fork seals, shock absorber replacement, and linkage maintenance.
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Brakes:
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Comprehensive guide to the EVO brake system, including ABS diagnostics, hydraulic component servicing, pad replacement, and fluid bleeding.
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Electrical System:
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Wiring diagrams, troubleshooting for ignition, lighting, charging system (alternator, regulator), starter motor, and electronic control units (ECU).
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Fuel System:
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Servicing of the fuel injection system, fuel pump, injectors, and throttle body adjustment.
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Exhaust System:
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Installation, removal, and maintenance of the exhaust headers and muffler assembly.
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Bodywork And Frame:
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Procedures for body panel removal and installation, fuel tank servicing, seat removal, and frame integrity checks.
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Procedures Included
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Maintenance:
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Regular scheduled maintenance, including oil and filter changes, air filter replacement, spark plug servicing, valve clearance adjustments, and brake fluid replacement.
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Troubleshooting:
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Diagnostic charts and symptom-based troubleshooting for common mechanical and electrical issues.
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Repair:
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Step-by-step repair procedures for all major component assemblies and systems.
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Diagnostics:
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Detailed diagnostic procedures, including electrical testing and common fault code interpretations (where applicable for the era).
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Technical Depth
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Depth:
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Comprehensive. Covers everything from basic maintenance to full engine rebuilds and complex electrical diagnostics.
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Engine Specifications
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Primary Engine
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Engine Type:
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Air/oil-cooled, four-stroke, horizontally-opposed twin-cylinder (Boxer)
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Displacement:
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1130 cc
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Bore X Stroke:
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101 mm x 70.5 mm
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Compression Ratio:
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9.0:1
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Valve Train:
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2 valves per cylinder, pushrod-operated overhead valves (OHV)
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Cooling System:
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Air cooling with supplementary oil cooling
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Performance
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Horsepower:
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85 hp @ 6750 rpm (approximate, model dependent)
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Torque:
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71 lb-ft @ 5250 rpm (approximate, model dependent)
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Fuel System
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Fuel Delivery:
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Bosch Motronic MA 2.4 fuel injection
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Fuel Type:
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Unleaded gasoline, minimum 95 octane (RON+MON)/2
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Ignition
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Ignition System:
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Digital electronic ignition with twin spark plugs per cylinder
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Lubrication
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Oil Capacity:
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Approx. 4.0 liters (with filter change)
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Oil Type:
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SAE 20W-50 or 15W-50 motorcycle specific engine oil meeting BMW specifications (e.g., BMW Longlife-01 or equivalent API SG/JASO MA).
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Maintenance
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Service Intervals
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Oil Change:
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Every 10,000 km or annually, whichever comes first.
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Valve Adjustment:
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Every 20,000 km or as indicated by sound/performance changes.
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Brake Fluid Change:
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Every 2 years.
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Air Filter Replacement:
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Every 20,000 km or as needed based on operating conditions.
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Spark Plug Replacement:
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Every 40,000 km (typically iridium plugs).
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Fluid Specifications
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Brake Fluid:
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DOT 4 or DOT 5.1 brake fluid.
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Transmission Fluid:
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SAE 75W-90 synthetic gear oil.
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Known Issues
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Common Problems:
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Potential for spline wear on the driveshaft and transmission input/output shafts (requires preventative maintenance), clutch slave cylinder leaks, and alternator bearing wear.
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Troubleshooting Focus:
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The manual provides specific guidance on diagnosing and rectifying common issues such as starting problems, electrical gremlins, and drive train noises.
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