This manual provides comprehensive information for the 1997 BMW R850GS and R850R motorcycles. These models, built upon esteemed boxer-twin heritage, offer a distinctive blend of touring capability and engineering reliability. Powered by an 848 cc air/oil-cooled, four-stroke flat-twin engine, they typically deliver around 70-75 HP and 75 Nm of torque, featuring fuel injection and a 5-speed manual transmission with shaft drive. The R850 series was designed as an accessible yet capable platform, known for its robust construction and enduring performance, making it a favored choice for riders seeking dependable adventure and road touring. This factory service repair manual is an authoritative English-language resource designed to guide owners, enthusiasts, and professional technicians through all aspects of maintaining and repairing the R850GS and R850R. It covers extensive details on engine systems, drivetrain, chassis components, and electrical systems, including in-depth procedures for scheduled maintenance, troubleshooting, diagnostics, and complete engine rebuilding. With hundreds of pages of detailed instructions, diagrams, and factory-level knowledge, this manual empowers users to perform their own servicing, reduce labor costs, and make informed decisions to ensure the longevity and optimal performance of their motorcycle. 🏷️ Basic Information Identification Make: BMW Model: R850GS / R850R Year: 1997 Codes Chassis Code: R259 👋 Introduction Market Position Target Audience: BMW R850GS/R850R owners, DIY enthusiasts, independent mechanics Competitive Analysis Authenticity: Actual Genuine Factory Repair Manuals (Not 3rd party) Key Features Benefits: Enables self-servicing, reduces labor costs, provides factory-level knowledge, aids in informed repair decisions Usability: Easy to use, search function, print selected pages, no advanced computer skills required Information Source: Authoritative source of information for maintaining and repairing the BMW R850GS/R850R, mirroring factory technician knowledge. Cost Savings: Potential to save $50 - $60 per hour on shop labor costs by enabling DIY servicing. 📋 Manual Details Coverage Areas Vehicles Covered: BMW R850GS, BMW R850R Page Count Estimated Pages: Hundreds (exact count not specified, but described as comprehensive) Content Density: Hundreds of pages, indicative of detailed, in-depth coverage for all aspects of the motorcycle. Manual Type Type: Factory Service Repair Manual Authenticity Claim: Genuine Factory Service Manual (implies official BMW documentation) Language Language: English Format File Format: PDF (Downloadable) Compatibility: Compatible with PC (Windows OS) and Mac. Can be burned to CD-ROM. 📖 Manual Coverage Systems Covered Engine: Top End, Lubrication System, Fuel System, Cooling System, Engine Management Systems Drivetrain: Clutch, Crankshaft, Transmission, Final Drive Chassis: Wheels, Tires, Brakes, Suspension, Steering, Frame Electrical: Electrical System, Wiring Diagrams Fuel System Detail: Fuel tank removal/installation, fuel pump testing, injector servicing, fuel pressure regulation, throttle body diagnostics. Electrical System Detail: Complete wiring diagrams, starter system, ignition system, charging system, lighting system, fault finding procedures for all electrical components. Frame And Bodywork: Frame inspection and repair, body panel removal and installation, fairings, seating, fuel tank mounting. Procedures Included Maintenance: Scheduled Maintenance, General Information, Common Fixes, Pre-escalation Tips Repair: Step-by-step repair procedures, Engine Fault Diagnosis, Part Testing, Troubleshooting Guide, Engine Rebuild, Refurbishment, Restoration Diagnostics: Engine fault symptom diagnosis, Electrical system diagnosis, Advanced troubleshooting Engine Rebuilding: Detailed procedures for engine disassembly, inspection, component replacement, and reassembly, including torque specifications and clearances. Tuning: Mention of 'tuning' suggests basic adjustments and performance optimization guidance. Suspension Servicing: Front fork disassembly, seal replacement, oil level and quantity, rear shock absorber inspection and adjustment (if applicable). Technical Depth Depth: Comprehensive (covers fundamentals to advanced repair, including factory technician knowledge) Diagnostic Tools: Information that implies the use of specific diagnostic techniques and potentially factory tools for advanced troubleshooting. Troubleshooting Guide: Advanced troubleshooting guide included, designed to help diagnose and correct complex problems. 📊 Manual Specifications File Format Resolution Quality: High Resolution Print Quality Printability: Fully Printable (individual pages, chapters, or entire manual) Binding Type Binding: Not Applicable (Digital PDF Download) Paper Type Paper Quality: Not Applicable (Digital PDF Download) ⚙️ Engine Specifications Primary Engine Type: Air/oil-cooled, four-stroke flat-twin (Boxer) engine Displacement: 848 cc (specified by model name R850) Bore Stroke Est: Approx. 90.0 mm x 66.0 mm (typical for R850 Boxer) Valve Train: Overhead camshaft (OHC) per cylinder, actuated by pushrods and rocker arms. Performance Horsepower Est: Approximately 70-75 HP (specific figures may vary slightly by model variant, but R850 generally around this mark) Torque Est: Approximately 75 Nm (specific figures may vary slightly by model variant) Fuel System Induction: Fuel Injection (Bosch Motronic variant typical for this era) 🔧 Transmission Standard Type: 5-speed manual gearbox Optional Optional Transmission: None indicated for this model year Features Drive: Shaft Drive (single-sided swingarm typical for BMW Boxer models) Clutch Type: Single-plate dry clutch (typical for BMW Boxer models of this era) 📐 Dimensions Exterior Wheelbase Est: Approx. 1430 mm (typical for R series motorcycles of this era) Weights Dry Weight Est: Approx. 190-210 kg (varies between GS and R variants) Gross Vehicle Weight Rating Est: Refer to specific model variant specifications in the manual; generally around 400kg. 🛡️ Safety...