🏷️ Basic Information

Make:

BMW

Manual Product Name:

BMW K1100RT R1100RS R850-1100GS R850-1100R Repair Manual

Manual Product Description:

Workshop Service Manual Repair Manual Download for BMW K1100RT, R1100RS, R850-1100GS, R850-1100R. Used by dealership technicians for maintenance, service, diagnosis, and repair. Highly detailed.

Vehicle Platform Codes Implied:

K-Series (K1100RT), R-Series (R1100RS, R850GS, R1100GS, R850R, R1100R)

👋 Introduction

Segment:

High-performance, luxury touring and sport-touring motorcycles.

Target Audience:

Owners seeking to perform their own maintenance and repairs, independent workshops, and BMW enthusiasts.

Rival Manufacturers:

Honda (e.g., ST1100), Yamaha (e.g., FJ1200), Kawasaki (e.g., GTR1000).

Bmw Engineering Philosophy:

Emphasis on rider comfort, advanced technology for its era, robust build quality, and boxer twin (R-series) or inline-four (K-series) engine configurations.

Manual Value Proposition:

Provides dealership-level technical information, empowering owners to maintain and repair their complex BMW motorcycles effectively, saving costs and ensuring longevity.

📋 Manual Details

Engine Coverage:

Complete engine overhaul, diagnosis, tuning, and component repair for all specified models.

Transmission Coverage:

Manual and potentially automatic (if applicable for any model variant) transmission service, repair, and troubleshooting.

Chassis Coverage:

Frame, suspension (front and rear), steering, wheels, and related components.

Electrical System Coverage:

Wiring diagrams, ignition system, lighting, battery, charging system, instrumentation, and electronic control units (ECUs).

Fuel System Coverage:

Fuel injection systems (Bosch Motronic variations likely), fuel pump, injectors, sensors, and emissions control.

Brake System Coverage:

Hydraulic systems, ABS (if equipped), brake calipers, master cylinders, and discs.

Bodywork And Fairings Coverage:

Disassembly, installation, and repair of fairings, body panels, and trim.

Troubleshooting Guides:

Comprehensive diagnostic procedures for common and uncommon issues.

Maintenance Schedules:

Recommended service intervals for all major components and systems.

Estimated Page Count:

Likely 500+ pages, typical for comprehensive workshop manuals covering multiple models.

Type:

Workshop Service Manual / Repair Manual

Language:

English (standard for this type of manual, though localized versions exist).

Format:

Downloadable (PDF likely)

📖 Manual Coverage

Engine Management:

Detailed information on the Bosch Motronic engine management system, including sensor diagnostics, actuator testing, and ECU fault codes.

Suspension System:

Adjustments, seal replacement, fluid changes for telescopic forks (e.g., Telelever on R-series) and rear shock absorbers.

Anti Lock Braking System:

Diagnosis and bleeding procedures for BMW's ABS systems (e.g., ABS II, ABS III).

Ignition System:

Spark plug specifications, ignition coil testing, timing adjustments (if applicable).

Fuel Delivery System:

Fuel pressure testing, injector resistance checks, fuel filter replacement.

Exhaust System:

Catalytic converter information, lambda sensor (O2 sensor) function.

Clutch Mechanism:

Hydraulic clutch operation, slave and master cylinder service, clutch disc replacement.

Cooling System:

Radiator service, fan operation, coolant type and capacity, thermostat replacement (for K-series).

Lubrication System:

Oil change intervals, oil filter part numbers, oil capacities, gearbox oil specifications.

Instrumentation And Indicators:

Diagnosis of dashboard lights, speedometer, tachometer, and warning indicators.

Routine Maintenance:

Oil changes, filter replacements, chain/drive shaft lubrication, brake fluid checks, tire pressure adjustments.

Engine Overhaul:

Piston ring replacement, valve lapping, camshaft inspection, head gasket replacement, bearing checks.

Transmission Rebuild:

Gear selection mechanism, clutch pack servicing, output shaft seal replacement.

Electrical Diagnostics:

Wiring harness inspection, multimeter usage for voltage, resistance, and continuity tests.

Fuel System Cleaning And Testing:

Injector cleaning, fuel pressure regulator testing.

Brake System Bleeding:

Standard bleeding procedures and specific procedures for ABS-equipped models.

Suspension Fork Rebuild:

Fork seal replacement, spring replacement, damping adjustment.

Bodywork Repair And Replacement:

Mounting point repair, fairing crack repair, decal application.

Torque Specifications:

Detailed torque values for all critical fasteners.

Depth:

Comprehensive, suitable for professional technicians and experienced DIY mechanics. Covers everything from basic checks to full engine and transmission rebuilds.

Diagnostic Capability:

Detailed troubleshooting charts, symptom-to-cause analysis, and diagnostic flowcharts.

Special Tools:

Identification and usage instructions for BMW-specific tools required for certain procedures.

📊 Manual Specifications

Format Details:

Likely a searchable PDF document, allowing for quick text-based retrieval of information.

Quality:

High-resolution scans or original digital files, ensuring clarity of text and diagrams.

Type For Download:

N/A (Downloadable format)

Type For Download:

N/A (Downloadable format)

⚙️ Engine Specifications

K1100Rt Engine:

1093cc, liquid-cooled, inline-four cylinder, DOHC, fuel-injected.

R1100 Engines:

1085cc (R1100RS, R1100GS, R1100R), air/oil-cooled, horizontally-opposed (boxer) twin-cylinder, SOHC, fuel-injected.

R850 Engines:

848cc (R850GS, R850R), air/oil-cooled, horizontally-opposed (boxer) twin-cylinder, SOHC, fuel-injected.

K1100Rt Horsepower:

Approximately 95-100 hp (depending on market and specific tuning).

R1100 Series Horsepower:

Approximately 90-95 hp (R1100RS/GS/R).

R850 Series Horsepower:

Approximately 70-80 hp (R850GS/R).

Injection System:

Bosch Motronic (various iterations like 2.1, 2.2, 2.4 for K1100 and 2.2, 2.4 for R1100 series), electronic fuel injection.

Fuel Type:

Unleaded gasoline (premium recommended).

K1100Rt Layout:

Inline 4-cylinder, transverse.

R Series Layout:

Boxer 2-cylinder, longitudinal.

🔧 Transmission

K1100Rt Transmission:

5-speed manual transmission.

R Series Transmission:

5-speed manual transmission with shaft drive.

Optional Transmission:

Some models may have had optional ABS integrated with the transmission control, but not an automatic transmission.

Drive System:

Shaft drive (final drive) on all listed R-series models. K1100RT also uses shaft drive.

Clutch Type:

Hydraulically operated single dry plate clutch (most R-series) or wet multi-plate clutch (K-series).

📐 Dimensions

K1100Rt Style:

Full-faired touring motorcycle.

R1100Gs Style:

Adventure/Dual-sport motorcycle.

R1100Rs Style:

Sport-touring motorcycle with adjustable fairing.

R850 1100R Style:

Naked or semi-faired standard motorcycle.

K1100Rt Wet Weight:

Approx. 270-280 kg (heavily equipped).

R1100Gs Wet Weight:

Approx. 230-250 kg.

R1100Rs Wet Weight:

Approx. 240-260 kg.

🛡️ Safety Features

Safety Standards:

Manufactured to meet European motorcycle safety standards of the era; specific crash test ratings for motorcycles are uncommon in the same way as cars, but build quality and component integrity are paramount.

ABS System:

Optional BMW Motorrad ABS (Anti-lock Braking System) available on many of these models, providing enhanced braking control, especially in adverse conditions.

Linked Braking:

Some models may feature linked braking systems, where applying one control affects both brakes to some degree.

Chassis Design:

Robust frame construction for stability and rider safety.

Lighting System:

Effective headlight and taillight systems for visibility.

💡 Technology Features

Infotainment Features:

Primarily focused on function over entertainment. Instrumentation typically includes analog speedometer/tachometer, digital odometer, trip meters, clock, and warning lights. Some higher-spec models might have provisions for radios or heated grips, but integrated infotainment as understood today was not a feature.

ABS:

BMW's pioneering ABS systems (ABS II and early ABS III) are significant technological features for rider safety.

Connectivity Features:

No modern connectivity features like Bluetooth or smartphone integration. Diagnostic ports for early diagnostic tools exist.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000 km (6,000 miles) or annually. Consult manual for exact interval.

Valve Clearance Check:

Typically every 20,000 km (12,000 miles). Shims are used for adjustment.

Spark Plug Replacement:

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

Engine Oil Spec:

API SG/SH or higher, SAE 20W-50 or 15W-40 recommended. Specific BMW recommendations may vary slightly. Consult manual.

Transmission Oil Spec:

SAE 75W-90 API GL-5 gear oil for gearbox and final drive (common for shaft drive).

Brake Fluid Spec:

DOT 4 hydraulic fluid.

Coolant Spec K1100Rt:

Ethylene glycol based coolant (e.g., BMW's own coolant or a compatible equivalent), mixed 50/50 with distilled water.

Common Wear Items:

Fuel pump relays (K-series), ABS pump solenoids, clutch slave cylinders, main wiring harness connector pins (corrosion), exhaust header pipe corrosion, some fuel injector O-rings.

Engine Management Quirks:

Hesitation or rough running due to aged fuel pressure regulators, dirty injectors, or faulty throttle position sensors (TPS) on Motronic systems.

Suspension Common Points:

Leaking fork seals, worn pivot bearings on Telelever systems, shock absorber degradation over time.

📚 Vehicle History

Bmw Motorcycle History:

BMW has a long and storied history in motorcycle manufacturing, dating back to the early 20th century, known for innovation, quality, and performance, particularly with their boxer twin engines and later the K-series inline-fours.

K1100Rt Evolution:

Successor to the K100RT, featuring a more powerful 1100cc engine and improved aerodynamics for touring comfort.

R1100 Series Evolution:

Represents a significant technological leap from earlier R-series boxers, introducing the Telelever front suspension, BMW's Motronic fuel injection, and increased power and displacement. The R1100GS became a benchmark in the adventure touring segment.

Production Years K1100Rt:

Approximately 1990-1996.

Production Years R1100Rs:

Approximately 1992-2001.

Production Years R1100Gs:

Approximately 1993-1999.

Production Years R850 1100R:

R850R: approx. 1994-2006; R1100R: approx. 1994-2001.

🏆 Awards & Recognition

Model Reputation:

The R1100GS, in particular, received acclaim for its versatility and go-anywhere capability, solidifying BMW's dominance in the adventure touring market. The K1100RT was praised for its comfort and performance as a sport-tourer.