Segment:
Mid-size naked motorcycle, known for its balance of performance, reliability, and affordability in its era.
Competitors:
Competed against models like the Honda CB650, Yamaha XS650, and Suzuki GS650.
Engine Type:
Smooth and reliable air-cooled, DOHC, inline-four cylinder engine.
Handling:
Praised for its balanced chassis and manageable power delivery, making it approachable for a wide range of riders.
Design:
Iconic 'Universal Japanese Motorcycle' (UJM) styling, a classic naked bike aesthetic.
Engine:
Complete disassembly, assembly, inspection, adjustment, and troubleshooting of the 4-cylinder DOHC engine.
Transmission:
Inspection, adjustment, and repair procedures for the 5-speed gearbox.
Fuel System:
Carburetor inspection, cleaning, adjustment, fuel tank and petcock maintenance.
Electrical System:
Ignition system, charging system (alternator, battery), lighting, starting system, wiring diagrams, and troubleshooting.
Brakes:
Front and rear brake system maintenance, caliper inspection, pad replacement, fluid changes, and adjustments.
Suspension:
Front fork maintenance, seal replacement, oil levels, rear shock absorber inspection and adjustment.
Wheels And Tires:
Wheel bearing inspection, tire pressure, spoke tensioning (if applicable), and rim maintenance.
Frame And Bodywork:
General inspection of the frame, seat removal, handlebar maintenance, and minor body panel adjustments.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, chain adjustment, and lubrication schedules.
Troubleshooting:
Diagnostic guides for common starting, running, and electrical issues.
Disassembly Assembly:
Detailed, step-by-step instructions for removing and reinstalling major components.
Adjustments:
Valve clearance, ignition timing, carburetor synchronization, and brake lever adjustments.
Depth:
Comprehensive workshop-level repair procedures with detailed specifications, diagrams, and torque values.
Engine Type:
Air-cooled, 4-stroke, DOHC, inline-four
Displacement:
652 cc (652 cubic centimeters)
Bore X Stroke:
62.0 mm x 54.0 mm (typical for early models)
Compression Ratio:
Typically around 9.0:1
Horsepower:
Approximately 64-66 hp at 9,000 rpm (varies slightly by year/spec)
Torque:
Approximately 37-39 lb-ft at 7,000 rpm (varies slightly by year/spec)
Carburetion:
Typically Mikuni VM22SS 22mm slide valve carburetors (quad)
Fuel Capacity:
Approximately 3.7 US gallons (14 liters)
Length:
Varies by year, typically around 85 inches (2160 mm)
Width:
Varies by year, typically around 30-32 inches (760-810 mm)
Height:
Varies by year, typically around 45-48 inches (1140-1220 mm)
Dry Weight:
Approximately 414 lbs (188 kg)
Wet Weight:
Approximately 445 lbs (202 kg)
Crash Test Ratings:
Not applicable to vintage motorcycles of this era.
Braking:
Front: Single disc (later models may have dual discs), Rear: Drum brake (later models may have disc).
Lighting:
Headlight, tail light, brake light, turn signals.
Oil Change Interval:
Typically every 2,000-3,000 miles (3,000-5,000 km) or 6 months.
Valve Adjustment Interval:
Typically every 4,000-6,000 miles (6,000-10,000 km).
Engine Oil:
API SE, SF or SG, SAE 10W-40 or 20W-50 (refer to manual for exact year/climate recommendation).
Brake Fluid:
DOT 3 or DOT 4 (check caliper/master cylinder markings).
Carburetor Sync:
Carburetors can drift out of sync, requiring periodic synchronization for smooth running.
Ignition Points:
Mechanical ignition points require cleaning and adjustment for proper timing.
Wiring Harness:
Aging wiring harnesses can develop frayed connections or corrosion, requiring inspection and repair.
Fuel Petcock:
Vacuum-operated petcock diaphragms can degrade, leading to fuel leaks or improper fuel flow.
Kawasaki Motorcycles:
Kawasaki Heavy Industries, Motorcycle Division, is a long-standing Japanese manufacturer known for its performance-oriented motorcycles.
Z650 Lineage:
The Z650 was a pivotal model, introducing a more modern inline-four engine configuration for Kawasaki in the mid-size segment, building upon the success of their Z1 series.
Production Period:
1976-1983
Key Variants:
KZ650-B (standard), KZ650-C (Custom), KZ650-D (SR - spoke wheels), KZ650-E (CSR - Custom Sport Rider), KZ650-F (Standard with disc brake), KZ650-H (CSR with different styling).
