🏷️ Basic Information

Make:

BMW

Model:

R850R

Year:

1999

Model Code:

R850R (Typ 259)

👋 Introduction

Segment:

Standard/Touring Motorcycle

Target Audience:

Owners seeking to perform their own maintenance, repairs, and diagnostics, as well as independent motorcycle workshops.

Competitors:

Comparable models from Honda (e.g., ST1100), Yamaha (e.g., FJ1200), Kawasaki (e.g., GTR1000), and other manufacturers in the sport-touring or standard motorcycle segment.

Value Proposition:

Provides the essential technical information required to maintain and repair the BMW R850R, empowering owners and technicians with accurate, factory-level data.

Manual Utility:

Essential tool for cost-effective maintenance, troubleshooting, and maximizing the lifespan and performance of the motorcycle.

📋 Manual Details

Comprehensive Coverage:

Yes

Specific Systems:

Engine, Transmission, Drivetrain, Chassis, Electrical System, Bodywork, Suspension, Brakes, Fuel System, Exhaust System, Cooling System, Lubrication System, Ignition System, Wheels and Tires, Controls, Instruments, Maintenance, Troubleshooting, Repair, Specifications, Diagrams

Estimated Page Count:

300-500

Type:

Service Repair Workshop Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Mechanical:

Complete engine disassembly, inspection, repair, and reassembly procedures for the boxer twin engine, including cylinder head, valves, pistons, connecting rods, crankshaft, timing chain, and lubrication system.

Fuel System:

Detailed procedures for fuel injection system (Bosch Motronic), fuel pump, fuel injectors, fuel filter, throttle body, and fuel tank maintenance and repair.

Ignition System:

Troubleshooting and repair of the electronic ignition system, spark plugs, ignition coils, and associated sensors.

Cooling System:

Maintenance and repair of the oil cooler system, oil pump, and oil filter replacement.

Transmission And Drivetrain:

Repair and maintenance of the 5-speed gearbox, clutch assembly (single dry plate), driveshaft, and final drive unit (including gear oil specifications).

Brakes:

Front and rear brake system overhaul, including ABS (optional on some models, specific diagnostics may vary), brake fluid replacement, caliper service, master cylinder repair, and brake line maintenance.

Suspension:

Front telescopic fork (including oil change and seal replacement) and rear Paralever single-sided swingarm suspension maintenance and repair, including shock absorber servicing.

Electrical System:

Comprehensive wiring diagrams, troubleshooting guides for lights, starting system, charging system (alternator, voltage regulator), battery maintenance, fuses, relays, instruments, and onboard diagnostics (if applicable).

Bodywork And Chassis:

Procedures for fairing removal and installation, seat, fuel tank, fenders, and general chassis inspection and maintenance.

Routine Maintenance:

Oil and filter changes, spark plug replacement, air filter cleaning/replacement, valve clearance checks, brake fluid flush, final drive oil change, battery check and charging.

Troubleshooting:

Systematic diagnostic procedures for common issues related to engine performance, starting problems, electrical faults, braking anomalies, and suspension issues, often with flowcharts.

Major Repairs:

Complete engine rebuild, transmission overhaul, clutch replacement, fork seal replacement, shock absorber rebuild/replacement, brake caliper and master cylinder overhaul.

Component Replacement:

Detailed instructions for replacing components such as starter motor, alternator, fuel pump, ignition coils, headlights, taillights, and various sensors.

Adjustments:

Carburetor synchronization (if applicable to earlier variants or specific markets), idle speed adjustment, clutch cable adjustment, throttle cable adjustment, headlight aim adjustment.

Diagnostic Capability:

Advanced diagnostics with specific torque values, electrical resistance readings, voltage checks, and component testing procedures.

Rebuild Instructions:

Detailed, step-by-step instructions for complete engine and transmission rebuilds, including critical tolerances and assembly sequences.

Diagrams And Illustrations:

Extensive use of exploded-view diagrams, schematics, and line drawings to clearly illustrate procedures and component locations.

Parts Information:

Identification of key components and their associated part numbers where applicable for reference.

📊 Manual Specifications

File Type:

PDF

Searchability:

Text-searchable PDF for quick information retrieval.

Image Resolution:

High-resolution images and diagrams for clarity.

Readability:

Clear, crisp text and sharp illustrations suitable for printing.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

Air-cooled, four-stroke, boxer-twin engine

Displacement:

848 cc

Bore X Stroke:

90.0 mm x 66.0 mm

Compression Ratio:

10.0:1

Valve Train:

Overhead camshaft (OHC), 2 valves per cylinder, pushrod actuated

Horsepower:

70 hp (51 kW) @ 6750 rpm (approx.)

Torque:

77 Nm (57 lb-ft) @ 4750 rpm (approx.)

Fuel Delivery:

Bosch Motronic electronic fuel injection (EFI)

Fuel Type:

Unleaded gasoline, minimum 95 RON

Oil Capacity:

Approximately 3.5 liters with oil filter change

Oil Type:

API SG or higher, SAE 15W-40 or 20W-50 (depending on ambient temperature)

Ignition Type:

Electronic ignition with dual spark plugs per cylinder

🔧 Transmission

Transmission Type:

5-speed manual gearbox

Clutch Type:

Single dry plate clutch, hydraulically actuated

Drivetrain:

Shaft drive to rear wheel

Final Drive Oil Type:

Hypoid gear oil, API GL-5, SAE 80W-90

📐 Dimensions

Length:

Approx. 2,210 mm (87.0 in)

Width:

Approx. 900 mm (35.4 in) at handlebars

Height:

Approx. 1,380 mm (54.3 in) at seat

Wheelbase:

Approx. 1,430 mm (56.3 in)

Dry Weight:

Approx. 215 kg (474 lbs)

Gross Vehicle Weight:

Approx. 450 kg (992 lbs)

🛡️ Safety Features

Crash Test Information:

N/A for motorcycles, but manual covers ABS systems where equipped.

ABS:

Optional Anti-lock Braking System (ABS) available on some models, with diagnostic procedures covered.

Lighting:

Halogen headlight, multi-reflector design; integrated turn signals.

Frame Type:

Steel tube frame

Brakes:

Dual front disc brakes, single rear disc brake

💡 Technology Features

Infotainment System:

Basic instrumentation with speedometer, tachometer, odometer, trip meter, fuel gauge, and warning lights. No integrated infotainment system.

ABS:

Optional ABS system enhances braking safety.

Connectivity Features:

N/A (no Bluetooth, smartphone integration, etc.)

🔧 Maintenance

Oil Change Interval:

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

Valve Clearance Check:

Every 10,000 km (6,000 miles)

Final Drive Oil Change:

Every 20,000 km (12,000 miles) or every two years

Brake Fluid Flush:

Every two years

Engine Oil Spec:

API SG or higher, SAE 15W-40 or 20W-50

Brake Fluid Spec:

DOT 4

Final Drive Oil Spec:

API GL-5, SAE 80W-90

Common Wear Items:

Clutch wear, driveshaft splines (requiring lubrication), fork seals, and some electrical connector issues can occur with age and mileage.

Engine Reliability:

Generally very reliable, but attention to valve adjustments and proper oil changes is crucial for longevity.

📚 Vehicle History

Heritage Focus:

BMW's long-standing reputation for building robust, reliable, and technically advanced motorcycles, particularly known for their boxer-twin engines and shaft drive.

Predecessor:

Built upon the lineage of the R100RT and R80 models, offering a more accessible and refined experience.

Successor:

Evolved into the R1100R and later R1150R models, with the R850R positioned as a more 'entry-level' boxer.

Production Period:

Mid-to-late 1990s

Manufacturing Location:

Berlin, Germany

🏆 Awards & Recognition

Industry Reputation:

BMW motorcycles are consistently recognized for their build quality, engineering, and touring capabilities. The R850R is praised for its characterful engine and comfortable ride.

Reliability Ratings:

Generally high reliability when properly maintained, often cited in motorcycle forums and owner reviews.