Segment:
Lightweight naked sportbike / streetfighter
Target Audience:
Enthusiasts seeking a simple, performance-oriented, and reliable motorcycle for urban riding and spirited backroad use.
Competitors:
Honda CB500, Kawasaki ER-5, Suzuki GS500, Ducati Monster (earlier models).
Design Philosophy:
Focus on a strong, torquey engine in a lightweight, agile chassis with minimal bodywork for a raw riding experience.
Manual Value Proposition:
Comprehensive factory documentation enabling owners and technicians to perform all necessary maintenance and repairs, extending the lifespan and preserving the performance of the SZR 660.
Engine:
Complete engine disassembly, assembly, inspection, and repair for all internal components (pistons, rings, crankshaft, camshaft, valves, etc.), cooling system, lubrication system, fuel system (carburetor tuning, fuel pump, fuel lines), ignition system, exhaust system, starting system, charging system.
Chassis:
Frame inspection and repair, suspension (front forks, rear shock absorber, linkages), steering system (handlebars, steering stem bearings), wheels, tires, and braking system (front and rear brakes, hydraulic lines, caliper service).
Electrical:
Wiring diagrams, lighting system, instrumentation, battery, starter motor, alternator, ignition coil, fuses, relays, and troubleshooting of electrical faults.
Bodywork:
Fairings, seat, fuel tank, fenders, and general body panel maintenance.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug service, chain maintenance, brake fluid replacement, coolant flush, valve clearance adjustment, carburetor synchronization.
Repair:
Comprehensive step-by-step repair procedures for all major mechanical and electrical components, including engine rebuilds, transmission overhauls, suspension fork servicing, brake caliper rebuilding, and electrical system troubleshooting.
Diagnostics:
Troubleshooting guides for common and uncommon problems, symptom-based diagnostics, and diagnostic procedures for engine performance, electrical systems, and braking issues.
Disassembly Reassembly:
Detailed instructions with hundreds of photos for complete disassembly and reassembly of all major vehicle systems and components.
Depth Of Coverage:
Full factory-level service and repair coverage, suitable for professional technicians and experienced DIY mechanics. Covers everything from basic fluid checks to complete engine and transmission rebuilds.
Torque Specifications:
Includes detailed torque specifications for all critical fasteners and engine components.
Wiring Diagrams:
Comprehensive, high-resolution wiring diagrams illustrating all electrical circuits and component locations.
Special Tools:
Lists and describes any special tools required for specific repair or maintenance procedures.
Troubleshooting Charts:
Includes detailed troubleshooting charts based on symptoms to aid in diagnosing problems efficiently.
Specifications Data:
Provides all necessary measurement specifications, tolerances, and data required for accurate repair and adjustment.
Engine Type:
4-stroke, SOHC, 4-valve, Single-cylinder
Displacement:
659 cc (660cc)
Bore X Stroke:
Undisclosed in provided info, but typically around 95mm x 93.5mm for this engine type
Cooling System:
Liquid-cooled
Compression Ratio:
Likely around 9.5:1 to 10.5:1
Horsepower:
Approx. 48-50 HP (at crank)
Torque:
Approx. 60-65 Nm (at crank)
Carburetor:
Twin Mikuni CV carburetors (likely 30-34mm)
Fuel Capacity:
Approx. 15 liters
Oil Change Interval:
Every 3,000-5,000 km or 6 months (refer to manual for exact specifications)
Valve Clearance Check:
Every 10,000-15,000 km (refer to manual for exact specifications)
Chain Lubrication:
Every 500-1000 km or after washing/rain
Engine Oil Type:
Yamalube 4T 10W-40 or equivalent API SG/SH/SJ, JASO MA (refer to manual for exact grade and capacity)
Coolant Type:
Yamaha's premix coolant or equivalent ethylene glycol-based antifreeze (refer to manual for specific mixture ratio and capacity)
Brake Fluid Type:
DOT 4 (refer to manual for exact specification)
Common Wear Items:
Clutch wear, steering head bearings, wheel bearings, fork seals, exhaust system corrosion, carburetor jetting sensitivity to fuel quality.
Engine Characteristics:
Single-cylinder thump can lead to vibrations at higher RPMs; requires regular chain and sprocket maintenance for optimal power transfer.
Yamaha Legacy:
Yamaha is a renowned Japanese manufacturer with a long history of producing high-performance motorcycles across various segments, from racing superbikes to practical commuters and off-road machines. Known for innovation and reliability.
Szr Lineage:
The SZR 660 was a unique offering, often considered a more accessible and practical interpretation of the sportbike concept, drawing inspiration from Yamaha's performance heritage but tailored for everyday usability. It featured a single-cylinder engine, a departure from multi-cylinder configurations common in its class.
Production Period:
1995-2001 (estimated, with minor changes up to 1998 as stated)
Manufacturing Location:
Likely Japan
