🏷️ Basic Information

Make:

BMW

Model:

R 1150 GS

Model Family:

GS Adventure Series

Chassis Code:

R21

👋 Introduction

Segment:

Dual-sport / Adventure touring motorcycle

Reputation:

Iconic, renowned for long-distance touring, off-road capability, and robustness.

Competitors:

Honda Africa Twin, Triumph Tiger, Yamaha Ténéré, KTM Adventure series.

Engine Layout:

Air/oil-cooled, horizontally opposed twin-cylinder boxer engine.

Suspension Design:

Telelever front suspension and Monolever rear drive for improved handling and ride comfort.

ABS:

Integral ABS II braking system for enhanced safety.

📋 Manual Details

Applicable Years:

1999, 2000, 2001, 2002, 2003, 2004, 2005

Estimated Pages:

Hundreds (exact count not specified, implies comprehensive)

Type:

Workshop Service Repair Manual

Language:

English (assumed based on product description context)

Format:

PDF

📖 Manual Coverage

Engine:

Complete engine disassembly, assembly, tuning, and troubleshooting for the R21 boxer engine.

Fuel System:

Fuel injection system (Bosch Motronic), fuel pump, injectors, throttle body, fuel lines.

Ignition System:

Ignition coils, spark plugs, ECU control, timing.

Transmission:

6-speed gearbox, clutch operation (single dry plate), torque converter (optional on some models), gearbox internal components, lubrication.

Drive Train:

Paralever rear drive, driveshaft, final drive unit (maintenance, lubrication, troubleshooting).

Suspension:

Front Telelever suspension, rear Monolever with adjustable shock absorber (pre-load, rebound damping), fork seals, bearings.

Brakes:

Integral ABS II (Anti-lock Braking System) components, hydraulic system, brake fluid bleeding, caliper overhaul, disc maintenance, master cylinders.

Electrical System:

Wiring diagrams, battery, alternator, starter motor, lighting system (headlights, taillights, indicators), fuse box, relays, diagnostic connectors.

Frame And Bodywork:

Chassis inspection, frame alignment, fairings, seat, fuel tank, body panel removal and installation, luggage system mounting.

Cooling System:

Oil cooler system, oil circulation and filtration.

Exhaust System:

Mufflers, catalytic converter (if equipped), exhaust headers, lambda sensors.

Routine Maintenance:

Oil changes, filter replacements, spark plug checks/replacement, brake fluid flush, tire pressure adjustments, chain lubrication (if applicable, though R1150GS is shaft drive).

Troubleshooting:

Diagnostic procedures for common and uncommon faults, fault code interpretation (if available in manual).

Engine Repair:

Top-end rebuild (cylinder head, valves), bottom-end overhaul (crankshaft, connecting rods), piston and ring replacement.

Transmission Repair:

Gearbox disassembly and reassembly, clutch replacement, bearing checks.

Suspension Servicing:

Fork seal replacement, shock absorber servicing, linkage lubrication.

Brake System Overhaul:

Complete ABS unit bleeding, caliper rebuilding, master cylinder replacement.

Electrical Diagnostics:

Wiring harness inspection, component testing, troubleshooting electrical gremlins.

Bodywork Repair:

Panel alignment, minor damage repair, mounting hardware specifications.

Depth:

Comprehensive from basic maintenance to complete engine and gearbox rebuilds, including detailed diagnostic procedures.

Diagnostic Focus:

Includes procedures for diagnosing issues with fuel injection, ignition, ABS, and electrical systems.

Torque Specifications:

Detailed torque values for all critical fasteners and components.

Clearances And Tolerances:

Specifications for engine component clearances, valve lash, and other critical tolerances.

📊 Manual Specifications

Compatibility:

Viewable on most devices with a PDF reader (computers, tablets, smartphones).

Resolution:

High-resolution, ensuring clarity of diagrams and text.

Binding:

N/A (PDF format)

Paper Quality:

N/A (PDF format)

Text Search:

Likely text-searchable PDF for quick information retrieval.

⚙️ Engine Specifications

Engine Type:

Four-stroke, horizontally opposed twin-cylinder (Boxer)

Displacement:

1130 cc (1130cc)

Bore X Stroke:

95 mm x 79 mm

Compression Ratio:

10.0:1

Valve Train:

2 valves per cylinder, DOHC (Double Overhead Camshafts), pushrod-actuated (incorrect - it's OHC with pushrods for valve actuation, but the primary drive is cam shafts in the block). Correcting to: OHC, pushrod-actuated valves (via rocker arms).

Cooling System:

Air/Oil Cooled

Horsepower:

95 hp (70 kW) at 7,250 rpm

Torque:

98 Nm (72 lb-ft) at 5,500 rpm

Fuel Delivery:

Electronic Fuel Injection (EFI) - Bosch Motronic MA 2.4

Fuel Type:

Unleaded gasoline, minimum 91 octane (RON+MON)/2

Oil Type:

API SG, JASO MA certified synthetic or semi-synthetic motorcycle oil, SAE 20W-50 or 15W-50 recommended.

Oil Capacity:

Approx. 4.0 liters (4.2 US quarts) with filter change

🔧 Transmission

Type:

6-speed manual gearbox

Type:

N/A (though some variants might have had variations, the core is 6-speed manual)

Clutch:

Single dry plate, hydraulically actuated

Final Drive:

Shaft drive via Paralever system

Gearbox Oil:

API GL-5, SAE 75W-90 synthetic gear oil

Gearbox Oil Capacity:

Approx. 1.0 liter (1.1 US quarts)

Final Drive Oil:

API GL-5, SAE 75W-90 synthetic gear oil

Final Drive Oil Capacity:

Approx. 0.25 liters (0.26 US quarts)

📐 Dimensions

Length:

Approx. 2200 mm (86.6 in)

Width:

Approx. 900 mm (35.4 in) over handlebars

Height:

Approx. 1420 mm (55.9 in) to top of windshield

Seat Height:

Approx. 860 mm (33.9 in) (standard seat)

Wheelbase:

Approx. 1488 mm (58.6 in)

Dry Weight:

Approx. 230 kg (507 lbs)

Wet Weight:

Approx. 247 kg (545 lbs) (fully fueled, with oil)

Gross Vehicle Weight Rating:

N/A (motorcycle)

Payload Capacity:

N/A (motorcycle)

Fuel Capacity:

26 liters (6.9 US gallons)

Reserve Fuel Capacity:

Approx. 4 liters (1.05 US gallons)

🛡️ Safety Features

Crash Test Ratings:

N/A (motorcycle specific ratings not typically published like cars)

ABS:

Integral ABS II (BMW's combined brake system)

Brakes Front:

Dual 305 mm discs with 4-piston calipers

Brakes Rear:

Single 276 mm disc with 2-piston caliper

Lighting:

Halogen headlight, multi-reflector taillight, LED indicators.

Frame Construction:

Steel tube frame, robust for touring and off-road use.

💡 Technology Features

Radio:

Optional aftermarket integration, not standard factory fitment.

Navigation:

Provision for GPS mounting, no integrated navigation system.

ABS:

Integral ABS II provides anti-lock braking for enhanced safety.

Traction Control:

No factory-installed traction control on this model.

Bluetooth:

N/A (no factory integration)

Dashboard:

Analog tachometer, digital speedometer, fuel gauge, gear indicator (on some models), warning lights.

🔧 Maintenance

Oil Change Interval:

Every 10,000 km (6,000 miles) or annually, whichever comes first.

Filter Change Interval:

With every oil change (oil filter).

Spark Plug Replacement:

Every 20,000 km (12,000 miles).

Valve Lash Adjustment:

Every 20,000 km (12,000 miles).

Brake Fluid Flush:

Every 2 years or as per manufacturer recommendation (typically 2 years).

Engine Oil:

See engine_specs: Lubrication section for details.

Gearbox Oil:

See transmission section for details.

Final Drive Oil:

See transmission section for details.

Brake Fluid:

DOT 4 (or DOT 5.1 if specified by manual)

Coolant:

N/A (Air/Oil cooled)

Common Problems:

Oil leaks (especially around the final drive and engine seals), clutch slave cylinder issues, fuel pump failures, ABS sensor issues, Telelever joint wear.

Preventative Maintenance:

Regularly check oil levels and for leaks, maintain ABS system, replace worn components promptly.

📚 Vehicle History

Heritage:

BMW Motorrad has a long history of producing durable, technologically advanced motorcycles, particularly known for its boxer engine platform and pioneering adventure bikes.

Lineage:

The R 1150 GS is the successor to the highly successful R 1100 GS and evolved into the R 1200 GS. It built upon the GS concept of a versatile motorcycle capable of both on-road touring and off-road adventuring.

Production Period:

1999-2005

Manufacturing Location:

Berlin, Germany

🏆 Awards & Recognition

Adventure Bike Icon:

Widely regarded as one of the most iconic and capable adventure motorcycles ever produced.

Reliability Perception:

Generally good, though some specific components require attentive maintenance and potential replacement.

Emissions:

Compliant with European emissions standards of its era.