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BMW R850 R850GS 1998 Service Repair Workshop Manual
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Basic Information Identification Make: BMW Model: R850R / R850GS Year: 1998 Codes Engine Code: R850xx (e.g., R850R, R850GS variants) Chassis Code: R259 Introduction Market Position Positioning: The BMW R850R and...
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| Basic Information | |
| Identification | |
| Make: | BMW |
| Model: | R850R / R850GS |
| Year: | 1998 |
| Codes | |
| Engine Code: | R850xx (e.g., R850R, R850GS variants) |
| Chassis Code: | R259 |
| Introduction | |
| Market Position | |
| Positioning: | The BMW R850R and R850GS were positioned as more accessible, user-friendly alternatives to the larger R1100 series, offering the characteristic BMW boxer-twin experience in a lighter, more manageable package, suitable for touring and everyday riding. |
| Competitive Analysis | |
| Competitors: | Competed against other middleweight touring and sport-touring motorcycles from brands like Moto Guzzi, Yamaha, Kawasaki, and Honda. |
| Key Features | |
| Engine Type: | Air-cooled, four-stroke, flat-twin (boxer) engine with two valves per cylinder. |
| Drive System: | Shaft drive, a hallmark of BMW motorcycles. |
| Gs Variant: | The R850GS variant featured longer travel suspension, wire-spoke wheels, and a higher handlebar for improved off-road capability and a more upright riding position. |
| Manual Details | |
| Coverage Areas | |
| Primary Coverage: | Full Service, Repair, Workshop Manual |
| Page Count | |
| Estimated Pages: | Approximately 300-500 pages (typical for comprehensive workshop manuals of this era) |
| Manual Type | |
| Type: | Workshop Manual / Service Manual |
| Language | |
| Language: | English (standard for international manuals) |
| Format | |
| Format: | Likely digital (PDF) or printed book |
| Manual Coverage | |
| Systems Covered | |
| Powertrain: | Engine (all aspects), Transmission (gearbox, clutch), Final Drive (shaft drive, differential) |
| Chassis: | Frame, Suspension (front forks, rear shock absorber), Steering, Brakes (ABS if equipped), Wheels, Tires |
| Electrical: | Ignition System, Lighting, Instrumentation, Battery, Charging System, Starter Motor, EFI System (fuel injection), ABS control unit (if equipped) |
| Bodywork: | Fairings, Body Panels, Seat, Fuel Tank, Handlebars, Footpegs |
| Procedures Included | |
| Maintenance: | Scheduled maintenance, oil changes, filter replacements, valve adjustments, spark plug replacement, brake fluid flush, clutch fluid flush, drive shaft spline lubrication |
| Repair: | Engine overhaul, gearbox rebuild, clutch replacement, suspension component replacement, brake caliper overhaul, electrical component diagnosis and repair, fuel system servicing |
| Diagnostics: | Troubleshooting guides, fault code interpretation (if applicable to EFI), systematic diagnostic procedures |
| Technical Depth | |
| Depth: | Comprehensive. Covers routine maintenance, intermediate repairs, and complete engine/gearbox rebuilds. Includes torque specifications, clearances, and assembly sequences. |
| Manual Specifications | |
| File Format | |
| Digital Format: | PDF (typically searchable and printable) |
| Print Quality | |
| Print Quality: | High-resolution scans for clear diagrams and text |
| Binding Type | |
| Binding Type: | N/A (for digital format) / Spiral-bound or perfect-bound (for printed versions) |
| Paper Type | |
| Paper Type: | N/A (for digital format) / Durable, high-quality paper stock (for printed versions) |
| Engine Specifications | |
| Primary Engine | |
| Type: | Air-cooled, four-stroke, flat-twin (boxer) engine |
| Displacement: | 848 cc |
| Bore X Stroke: | 90.0 mm x 66.0 mm |
| Compression Ratio: | 10.0:1 (typical for this engine family) |
| Performance | |
| Horsepower: | Approximately 70-75 hp @ 7,000 rpm (R850R), slightly less for R850GS due to gearing/tuning |
| Torque: | Approximately 75-77 Nm (55-57 lb-ft) @ 5,000 rpm |
| Fuel System | |
| Induction: | Electronic Fuel Injection (Bosch Motronic 2.2 typically) |
| Fuel Type: | Unleaded gasoline, 95 RON minimum recommended |
| Engine Components | |
| Valve Train: | Overhead camshaft, two valves per cylinder, pushrod actuated |
| Cooling System: | Air cooling |
| Transmission | |
| Standard | |
| Type: | 5-speed manual gearbox |
| Optional | |
| Optional Gearbox: | N/A (5-speed was standard) |
| Features | |
| Clutch Type: | Single dry plate clutch (cable operated) |
| Final Drive: | Shaft drive with single-sided swingarm |
| Dimensions | |
| Exterior | |
| Length: | Refer to specific model variant specifications (R850R vs. R850GS) |
| Width: | Refer to specific model variant specifications |
| Height: | Refer to specific model variant specifications |
| Weights | |
| Dry Weight: | R850R: Approx. 213 kg (470 lbs); R850GS: Approx. 215 kg (474 lbs) |
| Wet Weight: | R850R: Approx. 235 kg (518 lbs); R850GS: Approx. 237 kg (523 lbs) (with fluids) |
| Gross Vehicle Weight Rating: | Typically around 450-460 kg |
| Wheels Tires | |
| Front Tire Size: | R850R: 110/80 ZR 18; R850GS: 90/90-21 |
| Rear Tire Size: | R850R: 140/70 VR 17; R850GS: 130/80-17 |
| Wheel Type: | R850R: Cast alloy; R850GS: Wire-spoke |
| Safety Features | |
| Ratings | |
| Crash Test Ratings: | Motorcycles are not typically rated in the same way as cars; safety focuses on design and rider aids. |
| Active Features | |
| Braking System: | Integral ABS II (optional, but common on R850 models of this era). Front: Dual disc with 2-piston calipers. Rear: Single disc with 1-piston caliper. |
| Suspension: | Telelever front suspension (BMW patented), Monolever rear suspension, providing stability and predictable handling. |
| Passive Features | |
| Frame Construction: | Steel trellis frame offering rigidity and rider protection in a low-speed tip-over. |
| Lighting: | Halogen headlamp, integrated turn signals. |
| Technology Features | |
| Infotainment | |
| Infotainment System: | Primarily analogue instrumentation with basic LCD display for odometer, trip meter, and clock. No integrated infotainment system. |
| Driver Assistance | |
| ABS System: | BMW Integral ABS II was a significant technological feature for its time, providing combined braking actuation and anti-lock functionality. |
| Efi System: | Bosch Motronic electronic fuel injection offered precise fuel delivery and improved performance and emissions compared to carbureted systems. |
| Connectivity | |
| Connectivity: | No Bluetooth or smartphone integration. Basic electrical system for lights, ignition, and instruments. |
| Maintenance | |
| Service Intervals | |
| Oil Change Interval: | Typically every 10,000 km (6,200 miles) or annually, whichever comes first. |
| Valve Adjustment Interval: | Every 20,000 km (12,400 miles) (check manual for specific requirements). |
| Drive Shaft Spline Lube: | Every 10,000 km (6,200 miles) is recommended by many owners, though BMW's official interval may be longer. |
| Fluid Specifications | |
| Engine Oil: | SAE 15W-40 or 20W-50 (API SG or higher). Capacity: Approx. 3.0 liters (3.2 US quarts) with filter change. |
| Transmission Oil: | SAE 80W-90 API GL-5 gear oil. Capacity: Approx. 0.3 liters (0.3 US quarts). |
| Brake Fluid: | DOT 4 brake fluid (for Integral ABS II). |
| Coolant: | N/A (Air-cooled engine) |
| Known Issues | |
| Common Wear Items: | Drive shaft splines (require regular greasing), clutch slave cylinder seals, fuel pump issues, voltage regulator failures. |
| Electrical Gremlins: | Can occur with age, particularly related to corrosion in connectors and wiring harnesses, especially near the battery and ignition components. |
| Suspension Leaks: | Front fork seals and rear shock absorber can develop leaks over time, requiring replacement. |
| Vehicle History | |
| Brand Heritage | |
| Heritage: | BMW Motorrad has a long history dating back to the 1920s, renowned for its boxer engines, shaft drive, and robust touring motorcycles. |
| Model Evolution | |
| Evolution: | The R850 series was an evolution of the R100 series, introducing fuel injection and updated chassis designs. It served as a stepping stone to the highly successful R1100 series. |
| Production | |
| Production Period: | The R850R and R850GS were produced in the late 1990s and early 2000s, preceding the R850R Classic and other model updates. |
| Manufacturing Location: | Berlin, Germany |
| Awards & Recognition | |
| Recognitions | |
| Model Specific Awards: | While specific awards for the 1998 R850R/GS are not widely publicized, the model series benefited from BMW's reputation for build quality, reliability, and engineering excellence in the touring motorcycle segment. |
| Ratings | |
| Owner Satisfaction: | Generally high owner satisfaction due to the characterful engine, comfortable ergonomics (especially for touring), and robust build quality, despite some known maintenance requirements. |