Market Position:
The Yamaha XV920 Virago was a cruiser-style motorcycle that entered a burgeoning market segment. It aimed to offer a V-twin experience with Yamaha's reliability and engineering, competing with models from Harley-Davidson and Japanese manufacturers exploring this style.
Competitive Analysis:
Competed directly with models like the Honda Shadow series and Suzuki GS series cruisers. The Virago lineup, particularly the 750 and 920, helped define the metric cruiser segment for Yamaha.
Key Features:
Shaft drive, V-twin engine, cruiser styling, focus on torque and rider comfort.
Systems Covered:
Engine mechanical, fuel system, ignition system, lubrication system, cooling system, exhaust system, transmission, clutch, final drive, braking system, suspension (front and rear), steering system, electrical system (lighting, starting, charging, ignition, indicators, instruments), chassis, bodywork, troubleshooting, specifications.
Procedures Included:
Removal, installation, disassembly, assembly, inspection, adjustment, maintenance, lubrication, troubleshooting, repair, diagnostic procedures, safety precautions, special tool usage.
Technical Depth:
Detailed, comprehensive step-by-step procedures, explanations, and pictorial diagrams for all repair interventions. Includes special notes, important points, service data, precautions, wear limits, and torque specifications.
Engine Type:
Air-cooled, 4-stroke, V-twin
Bore X Stroke:
85.0 mm x 82.0 mm (typical for this era V-twin)
Compression Ratio:
8.5:1 (typical)
Valve Configuration:
2 valves per cylinder, SOHC
Horsepower:
Approx. 55-60 HP (at rear wheel, estimated)
Torque:
Approx. 55-60 lb-ft (at rear wheel, estimated)
Carburetor Type:
Dual Mikuni VM34SS (likely)
Fuel Delivery:
Carbureted
Oil Change Interval:
Refer to manual for specific mileage/time intervals; typically every 3,000-5,000 miles or annually.
Spark Plug Replacement:
Refer to manual for intervals, often around 6,000-10,000 miles.
Valve Adjustment:
Refer to manual; critical for performance and longevity, typically every 10,000-15,000 miles.
Engine Oil Type:
Yamaha recommends SAE 10W-40 or 20W-40 API SG or higher, JASO MA certified motorcycle oil. Always verify with manual.
Engine Oil Capacity:
Approx. 2.7 L (2.9 US qt) with filter change.
Brake Fluid Type:
DOT 3 or DOT 4 (verify with manual)
Final Drive Oil Type:
Yamaha recommends SAE 80W API GL-4 hypoid gear oil.
Known Issues:
Carburetor tuning can be sensitive, especially after sitting. Seal leaks (e.g., rear main seal, transmission seals) can occur with age. Ignition system components can degrade over time. Drive shaft splines require periodic greasing. Carburetor diaphragm wear.
Carburetor Cleaning:
Frequent cleaning and rebuilding may be necessary due to fuel deposits and aging diaphragms.
Electrical Connections:
Corrosion on connectors can lead to intermittent electrical faults.
Spark Plug Gap:
0.6 - 0.7 mm (0.024 - 0.028 in) (Typical, confirm with manual)
Idle Speed:
1000 +/- 100 RPM (typical, confirm with manual)
Valve Clearance Intake:
0.05 - 0.10 mm (0.002 - 0.004 in) (Cold, typical, confirm with manual)
Valve Clearance Exhaust:
0.08 - 0.13 mm (0.003 - 0.005 in) (Cold, typical, confirm with manual)
Brand Heritage:
Yamaha has a long-standing reputation for producing high-quality motorcycles across various genres, from sportbikes to cruisers, known for their engineering prowess and performance.
Model Evolution:
The XV920 Virago was part of Yamaha's initial foray into the cruiser market. It paved the way for subsequent Virago models (like the XV700, XV1000, XV1100) and the evolution of Yamaha's cruiser technology and styling.
Production Years:
1981-1983 (XV920), with successor models continuing for many years.
Manufacturing Location:
Japan
Diagnostic Capability:
Excellent, with dedicated troubleshooting sections covering common problems and their resolutions.
Repair Completeness:
Provides complete procedures for engine, drivetrain, suspension, brakes, and electrical systems, allowing for full overhauls.
Customization Support:
While primarily focused on repair, understanding component functions aids in informed customization.
Diy Suitability:
Highly suitable for DIY mechanics with mechanical aptitude, due to clear instructions and diagrams. Emphasis on using correct tools and safety practices.
Professional Reference:
Valuable resource for professional mechanics needing quick access to specifications, torque values, and procedural details.
Historical Value:
Offers insight into early Japanese V-twin cruiser technology and design.
