Motorcycle Segment:
Mid-size, parallel-twin motorcycle known for its classic styling and strong parallel-twin engine.
Key Competitors:
Competed against models like the Triumph Bonneville, Kawasaki KZ650, and Honda CB750 (though the XS650 leaned more towards the Bonneville ethos).
Engine Type:
Air-cooled, SOHC, parallel-twin engine with a distinctive 270-degree crankpin arrangement, providing a unique firing order and exhaust note.
Handling:
Generally praised for its balanced chassis and comfortable riding position, making it suitable for touring and everyday use.
Design Philosophy:
Emphasized classic motorcycle aesthetics with modern (for its era) engineering.
Engine:
Complete disassembly, inspection, repair, and reassembly of the XS650 engine, including cylinder head, pistons, crankshaft, transmission components, and lubrication system.
Fuel System:
Carburetor tuning, maintenance, and overhaul (Mikuni VM series); fuel tank, petcock, and fuel lines.
Ignition System:
CDI ignition system components, timing adjustments, spark plug specifications, and troubleshooting.
Electrical System:
Wiring diagrams, charging system (alternator, rectifier/regulator), battery maintenance, lighting, starting system, and fuses.
Drivetrain:
Clutch operation and adjustment, primary drive, final drive chain and sprockets, gearbox inspection and repair.
Brakes:
Front disc brake system (caliper, master cylinder, fluid) and rear drum brake maintenance and adjustment.
Suspension:
Front fork service (oil changes, seal replacement), rear shock absorber inspection and replacement, linkage maintenance.
Steering:
Handlebar removal, steering head bearing adjustment and replacement.
Wheels And Tires:
Wheel bearing maintenance, tire pressure recommendations, and basic wheel truing.
Frame And Bodywork:
Frame inspection, seat, tank, and fender removal/installation.
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, chain lubrication and adjustment, brake bleeding.
Troubleshooting:
Diagnostic flowcharts and symptom-based troubleshooting for common problems across all major systems.
Repair:
Detailed step-by-step instructions for component repair, overhaul, and replacement.
Rebuilds:
Comprehensive instructions for complete engine and gearbox rebuilds.
Depth Level:
Full Workshop Manual - Suitable for professional technicians and experienced DIY mechanics.
Engine Type:
Air-cooled, 4-stroke, SOHC, parallel-twin
Bore X Stroke:
75.0 mm x 74.0 mm
Compression Ratio:
8.4:1 (typical, may vary slightly by year)
Crankshaft Configuration:
270-degree
Horsepower:
Approx. 53 PS (39 kW) @ 6500 rpm (varies by year and tuning)
Torque:
Approx. 5.5 kg-m (54 Nm; 40 lb-ft) @ 5000 rpm (varies by year and tuning)
Carburetor Type:
Dual Mikuni VM34SS (2x 34mm constant velocity carburetors)
Fuel Capacity:
17 Liters (4.5 US gal) - typical for the E model
Oil Capacity:
2.4 Liters (2.5 US qt) with filter change
Length:
Approx. 2200 mm (86.6 in) (varies slightly by model year and configuration)
Width:
Approx. 800 mm (31.5 in) (varies)
Height:
Approx. 1150 mm (45.3 in) (varies)
Dry Weight:
Approx. 190 kg (419 lbs) (varies)
Wet Weight:
Approx. 205 kg (452 lbs) (varies)
Safety Features Era:
Standard for its time; focused on mechanical reliability rather than electronic safety aids.
Brakes:
Front: Single disc brake, Rear: Drum brake. Dual discs became optional or standard on later 'Special' variants or international markets.
Lighting:
Halogen headlamp, taillight, turn signals.
Oil Change Interval:
Every 3,000 - 5,000 km (2,000 - 3,000 miles) or 6 months, whichever comes first. Manual will provide precise intervals.
Valve Adjustment Interval:
Every 6,000 - 10,000 km (4,000 - 6,000 miles). Specific procedure and clearances in manual.
Chain Lubrication Adjustment:
Every 1,000 km (600 miles) or as needed, especially after wet riding. Manual specifies slack adjustment.
Engine Oil Type:
SAE 20W-40 or 20W-50 motorcycle specific oil meeting API SF or SG classification. Manual will confirm exact specification.
Fork Oil Type:
Yamalube Fork Oil (e.g., 10W) or equivalent motorcycle fork oil. Manual will specify viscosity and volume.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (for the front disc brake).
Charging System:
Original rectifiers/regulators can be prone to failure. Upgraded solid-state units are common aftermarket replacements.
Tappet Noise:
Valve train wear can lead to tappet noise if adjustments are neglected. Regular adjustments are crucial.
Carburetor Synchronization:
Carburetors require periodic synchronization for smooth running and optimal performance.
Oil Leaks:
Common areas for leaks include the oil filter housing, tappet covers, and crankcase seals due to age.
Yamaha Motorcycles:
Yamaha Motor Corporation, founded in 1955, has a rich history in motorcycle manufacturing, known for innovation and performance.
Xs650 Lineage:
The XS650 was first introduced in 1970 and was produced for over a decade, evolving through various iterations (e.g., XS650B, XS650C, XS650D, XS650SE). The 'E' model represents a refinement of the earlier models.
Manufacturing Location:
Japan
Popularity:
The XS650 gained a strong following among riders who appreciated its classic British twin styling, accessible performance, and customization potential. It became a popular platform for cafe racers and custom builds.
