Positioning:
The Yamaha SR500 was a popular motorcycle known for its classic styling, torquey single-cylinder engine, and reliable performance, appealing to riders seeking a simple yet engaging riding experience.
Competitors:
Competed with other large-displacement single-cylinder motorcycles of the era, such as the Royal Enfield Bullet and some British singles, offering a Japanese alternative with modern (for its time) engineering.
Engine Type:
Large-bore, long-stroke single-cylinder engine providing strong low-end torque and a distinctive thumper sound.
Design:
Classic Universal Japanese Motorcycle (UJM) styling with clean lines, wire-spoke wheels, and a comfortable riding posture.
Simplicity:
Relatively simple mechanical design, making it accessible for maintenance and customization.
Engine Overhaul:
Comprehensive disassembly, assembly, inspection, and repair of the 499cc engine.
Fuel System:
Carburetor (Mikuni VM34-1) tuning, cleaning, and overhaul; fuel tank, petcock, and lines.
Ignition System:
CDI ignition system, timing, spark plug selection and gap.
Transmission And Clutch:
Clutch operation, adjustment, and replacement; gearbox inspection and maintenance.
Suspension:
Front telescopic forks (oil change, seal replacement, spring inspection); rear swingarm and shock absorbers (adjustment, replacement).
Brakes:
Front disc brake (caliper service, pad replacement, hydraulic system bleeding); rear drum brake adjustment.
Electrical System:
Wiring diagrams, battery, charging system (alternator, regulator/rectifier), lighting, starter motor, instrumentation.
Exhaust System:
Exhaust pipe and muffler maintenance.
Cooling System:
Air-cooled engine; no liquid cooling system.
Frame And Bodywork:
Frame inspection, swingarm removal, body panel maintenance.
Maintenance:
Regular maintenance, lubrication, inspections, and adjustments.
Troubleshooting:
Diagnostic guides for common starting, running, and performance issues.
Repair:
Step-by-step instructions for component removal, installation, and repair.
Disassembly Assembly:
Detailed procedures for major component disassembly and reassembly.
Specifications:
Service data, tightening torques, wear limits, and adjustment values.
Special Tools:
Identification and usage of special service tools.
Depth:
Comprehensive coverage for both DIY enthusiasts and professional mechanics, from routine maintenance to complete engine rebuilds.
Engine Type:
4-stroke, SOHC, single-cylinder, air-cooled
Displacement:
499 cc (30.4 cubic inches)
Bore X Stroke:
87.0 mm x 84.0 mm
Valve Train:
SOHC, 2 valves per cylinder
Carburetor:
Mikuni VM34-1
Horsepower:
Approx. 30-33 HP (at crank)
Torque:
Approx. 3.8-4.0 kgf-m (27.5-29.0 lb-ft) at 4,500 rpm
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
17.0 L (4.5 US gal)
Features:
Basic instrumentation including speedometer, odometer, and neutral indicator. No advanced infotainment features.
Features:
No electronic rider aids or driver assistance systems; focus on mechanical simplicity and rider control.
Features:
No connectivity features; purely analog motorcycle.
Oil Change Interval:
Refer to manual, typically every 3,000-5,000 km (1,800-3,000 miles) or annually.
Valve Adjustment Interval:
Refer to manual, typically every 6,000-10,000 km (3,700-6,200 miles).
Spark Plug Replacement:
Refer to manual, typically every 10,000-15,000 km (6,200-9,300 miles).
Engine Oil Type:
Yamalube 4 (or equivalent SAE 20W-40, API SE or SF)
Engine Oil Capacity:
2.0 L (2.1 US qt) without filter change; 2.2 L (2.3 US qt) with filter change.
Fork Oil Type:
Yamaha Fork Oil (or equivalent SAE 10W)
Fork Oil Capacity:
Refer to manual (per leg), typically around 150-200 ml.
Common Problems:
Kickstart mechanism wear, stator failures, some carburetor jetting sensitivity, and potential for valve seat recession on older models if not properly maintained.
Maintenance Tips:
Regularly clean and check the air filter, inspect the chain and sprockets, and ensure proper valve clearances are maintained.
Heritage:
Yamaha Motor Corporation has a long history of producing high-quality motorcycles, renowned for their performance, reliability, and innovation.
Evolution:
The SR500 was introduced as a modern interpretation of the classic big-bore thumper, building on Yamaha's experience with single-cylinder engines. It remained in production with minor updates for many years, a testament to its enduring appeal.
Production Period:
1978-1992 (for the first generation, with variations in specific markets).
Manufacturing Location:
Japan
