Market Position:
Essential technical resource for owners and mechanics of the Yamaha XS650 motorcycle, a classic parallel-twin motorcycle known for its versatility and enduring appeal.
Value Proposition:
An inexpensive way to keep your vehicle working properly by providing comprehensive, factory-quality service information.
Competitive Analysis:
This manual offers factory-level documentation, providing a crucial advantage over generic repair guides or fragmented online information for owners seeking accurate and complete maintenance and repair procedures for their specific model years.
Information Source:
Official full factory service repair manual, ensuring accuracy and completeness.
Key Features:
Comprehensive coverage, detailed step-by-step instructions, hundreds of photos/illustrations, clear troubleshooting guidance for electrical systems, digital download convenience, complete printability.
Coverage Areas Overview:
Comprehensive service and repair information for the Yamaha XS650 (1978-1981), suitable for both do-it-yourself owners and professional mechanics.
Estimated Page Count:
Hundreds of pages (exact count not specified, but indicated as extensive)
Content Structure:
Organized into chapters with numbered instructions, notes, cautions, warnings, and numbered table of contents for easy navigation.
Manual Type:
Workshop Service Repair Manual
Target Audience:
Do-it-yourself owners and experienced mechanics.
Digital Delivery Method:
Instant download link provided on the checkout page after payment.
Digital Storage Options:
Can be saved to hard drive or burned to CD-ROM.
Systems Covered:
General Information, Fuel System, Cooling System, Engine Top End, Clutch, Engine Lubrication System, Engine Removal/Installation, Crankshaft/Transmission, Wheels/Tires, Final Drive, Brakes, Suspension, Steering, Frame, Electrical System, Appendix.
Electrical System Detail:
Covers troubleshooting and repair of the electrical system, including ignition, charging, lighting, starting, and accessory circuits, with detailed wiring diagrams.
Fuel System Detail:
Covers fuel tank, petcock, fuel lines, and detailed carburetor service, adjustment, and synchronization.
Brakes Detail:
Comprehensive coverage of front and rear brake systems, including hydraulic components, pads, calipers, and master cylinders.
Suspension Detail:
Detailed instructions for front fork service, including oil changes and seal replacement, and rear shock absorber maintenance.
Procedures Included:
Step-by-step repair and service procedures based on complete disassembly, troubleshooting, diagnostics, maintenance, and overhaul for all covered systems.
Engine Rebuild Procedures:
Includes procedures for complete engine disassembly, inspection, repair, and reassembly of all internal engine components, including crankshaft, transmission, clutch, and top-end.
Frame And Suspension Repair:
Detailed instructions for frame inspection, repair, front fork overhaul, rear shock absorber servicing, and alignment.
Troubleshooting Guides:
Integrated troubleshooting sections for common problems across all systems, with specific focus on electrical system diagnostics.
Technical Depth:
In-depth, professional quality, factory-level detail covering everything from basic maintenance to complex repair and troubleshooting.
Diagnostic Capabilities:
Provides diagnostic procedures for identifying common and uncommon faults across all major vehicle systems, aided by detailed descriptions and troubleshooting flowcharts.
Illustrations And Photos:
Includes hundreds of detailed illustrations, drawings, and photos to guide the user through each service and repair procedure, with enlarged inset views for critical parts.
Software Requirements:
Adobe PDF Reader or compatible software.
Operating System Compatibility:
All PC-based Windows operating systems and Mac.
Print Quality:
Printable without restriction, all pages printable.
Binding Type:
Digital Download (printable to user's preferred binding)
Paper Type:
N/A (Digital)
Engine Type:
Parallel-twin, SOHC
Engine Displacement:
653 cc
Bore X Stroke:
75 mm x 74 mm
Horsepower Estimate:
Approximately 50-53 hp @ 6,500 rpm (varies by year/tuning)
Torque Estimate:
Approximately 40-42 lb-ft @ 5,000 rpm (varies by year/tuning)
Carburetion:
Dual Mikuni VM34SS carburetors
Fuel Type:
Unleaded gasoline
Engine Lubrication System
Oil Capacity:
Approximately 2.6 liters (with filter change)
Oil Type Specification:
Yamaha recommends Yamalube 20W-40 or equivalent API SE, SF service classification oil (manual will provide exact specifications).
Cooling Method:
Air-cooled
Valve Adjustment Procedure:
Detailed instructions for valve clearance checking and adjustment.
Piston Ring Replacement:
Procedures for piston and ring removal, inspection, and installation.
Crankshaft Inspection:
Guidance on checking crankshaft runout and bearing condition.
Transmission Gear Inspection:
Procedures for inspecting transmission gears and dog engagement for wear or damage.
Recommended Oil Change Interval:
Typically every 3,000 miles or 6 months, whichever comes first (refer to manual for exact intervals).
Recommended Spark Plug Replacement:
Refer to manual for specific mileage or time intervals; typically 6,000-10,000 miles.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic fluid (manual will specify precise type).
Fork Oil Type And Capacity:
Refer to manual for specific viscosity (e.g., 10W) and volume per fork leg.
Known Issues Common Topics:
Carburetor synchronization, valve adjustments, charging system (stator/rectifier), cam chain tensioner wear, potential oil leaks, fork seal leaks. The manual will provide detailed diagnostic and repair procedures for these and other potential issues.
Front Tire Size:
Typically 3.50-19 (manual will provide exact specifications and pressure recommendations).
Rear Tire Size:
Typically 4.00-18 or 4.25-18 (manual will provide exact specifications and pressure recommendations).
Ignition System:
CDI (Capacitor Discharge Ignition) with dual ignition coils.
Charging System:
Alternator with external voltage regulator (or internal for some models/years).
Battery Type:
12V, typically a YB16CL-B or similar.
Brand Heritage:
Yamaha Motor Company, a global leader in motorcycle manufacturing, known for innovation, performance, and reliability since its inception.
Model Evolution Summary:
The XS650, introduced in the early 1970s, became a significant model for Yamaha, representing a robust parallel-twin engine platform that was adapted for various models and rider preferences. The 1978-1981 period saw refinements and variations within this successful generation.
Production Period:
The XS650 model line was produced for many years, with the 1978-1981 models being part of its established and popular second generation.
