Model Segment:
Supersport Motorcycle (Homologation Special)
Original Intent:
Developed to homologate Yamaha's YZR-M1 MotoGP racing motorcycle for World Superbike Championship (WSBK) competition. Known for its exotic nature and high performance.
Key Competitors Era:
Ducati 916, Honda RC45, Suzuki GSX-R750, Kawasaki ZX-7R, Aprilia RSV Mille.
Engine Architecture:
Inline 4-cylinder, DOHC, 20 valves (5 valves per cylinder), liquid-cooled.
Chassis Design:
Deltabox II frame, advanced suspension components (e.g., fully adjustable front forks, linkage-type rear suspension).
Historical Significance:
Represents a peak in Yamaha's homologation special era, showcasing cutting-edge technology and race-derived engineering.
Engine Systems:
Engine disassembly, assembly, inspection, lubrication, cooling system, fuel system (carburetion/injection depending on specific model variant), ignition system, starting system, exhaust system.
Transmission Drivetrain:
Clutch operation and adjustment, gearbox disassembly and assembly, shift mechanism, final drive (chain and sprockets).
Chassis Suspension:
Frame inspection, front fork (suspension, damping, adjustment, seals, oil), rear shock absorber, swingarm, steering system.
Braking System:
Front and rear brake systems (calipers, master cylinders, brake lines, discs, pads), hydraulic system bleeding, troubleshooting.
Electrical System:
Wiring diagrams, battery, charging system (stator, rectifier/regulator), lighting system, ignition switch, starter motor, indicators, horn, sensors, ECU.
Fuel System:
Carburetor models: detailed disassembly, cleaning, jetting, synchronization. Fuel Injection models: Fuel pump, injectors, sensors, ECU control parameters (if applicable).
Bodywork Cosmetics:
Fairing removal and installation, seat, fuel tank, body panel repairs and specifications.
Maintenance:
Scheduled maintenance (oil changes, filter replacements, chain adjustment, spark plug checks), fluid level checks, lubrication points.
Troubleshooting:
System-specific diagnostic charts, common problems and solutions, electrical fault finding.
Repair Rebuild:
Complete engine overhaul, gearbox rebuild, suspension servicing, brake system overhauls, electrical component replacement.
Component Installation:
Detailed instructions for component removal and installation, torque specifications for all fasteners.
Diagnostic Capability:
Advanced diagnostics with detailed explanations of system functions and potential failure points.
Rebuild Scope:
Comprehensive rebuild procedures for major components including engine internals, gearbox, and suspension.
Electrical Detail:
Detailed wiring diagrams with component identification and wire color codes.
Engine Type:
Inline 4-cylinder, 4-stroke
Bore X Stroke:
72.0 mm x 46.0 mm
Valvetrain:
DOHC, 5 valves per cylinder (20 valves total)
Compression Ratio:
11.5:1 (approximate, can vary by specific model revision)
Horsepower:
Approx. 106 hp @ 11,000 rpm (at the crank, varies by market regulations)
Torque:
Approx. 7.5 kg-m (73.5 Nm) @ 9,000 rpm (at the crank)
Fuel Delivery:
Carbureted (Initially: Four 38mm Mikuni CV or flat-slide carbs, depending on market). Later models or variants may feature fuel injection.
Fuel Type:
Unleaded gasoline, minimum 95 RON (Octane rating may vary by region)
Ignition System:
Digital CDI (Capacitor Discharge Ignition)
Transmission Type:
6-speed constant mesh
Clutch Type:
Wet, multi-disc, cable-actuated
Gear Ratios:
Specific gear ratios are detailed in the manual and vary slightly by model year. Example: 1st: 2.500, 2nd: 1.875, 3rd: 1.500, 4th: 1.273, 5th: 1.143, 6th: 1.037 (Illustrative, check manual for precise values).
Length:
Approx. 2,040 mm (80.3 in)
Width:
Approx. 710 mm (28.0 in)
Height:
Approx. 1,120 mm (44.1 in)
Wheelbase:
Approx. 1,405 mm (55.3 in)
Dry Weight:
Approx. 189 kg (416.7 lbs)
Wet Weight:
Approx. 210 kg (463 lbs) (with all fluids and full tank)
Fuel Tank Capacity:
Approx. 18 Liters (4.75 US gal)
Instrument Cluster:
Analog tachometer, digital speedometer, fuel gauge, odometer, trip meters, clock, and various indicator lights. Focus is on essential performance data.
ABS:
Not standard on original homologation models. Later iterations or aftermarket upgrades may include ABS.
Traction Control:
Not standard on original homologation models.
Bluetooth Usb:
N/A (Designed pre-dating modern connectivity features).
Oil Change Interval:
Every 3,000 - 5,000 km (1,800 - 3,000 miles) or 6 months, whichever comes first (Refer to manual for specific intervals based on usage).
Chain Maintenance:
Lubricate and adjust chain every 800 - 1,000 km (500 - 600 miles) and check for wear. Adjust tension to specification (typically 20-30mm slack).
Spark Plug Check:
Check and replace as needed, typically around 10,000 - 15,000 km (6,000 - 9,000 miles).
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified motorcycle oil. (Always confirm with manual).
Coolant Type:
Ethylene glycol-based, anti-freeze/anti-boil mixture. Yamaha recommends Yamalube Coolant or equivalent (50/50 mix with distilled water).
Brake Fluid Type:
DOT 4 (or DOT 5.1 for higher performance/temperature applications, check manual).
Fork Oil Type:
Specific viscosity grade (e.g., SAE 10W) and quantity detailed in manual. Yamaha fork oil is recommended.
Carburetor Issues:
Carburetor synchronization can drift, requiring periodic adjustment. Issues with fuel quality can lead to jet clogging.
Electrical Connections:
Corrosion or loose connections in wiring harness, especially at high-mileage examples, can cause intermittent electrical faults.
Suspension Seals:
Front fork seal leaks can occur over time, requiring replacement.
Clutch Slippage:
Aggressive riding can lead to clutch wear and slippage, necessitating clutch plate replacement.
Yamaha Motorsports:
Yamaha has a rich and successful history in motorcycle racing, particularly in Grand Prix (MotoGP) and World Superbike (WSBK) championships, contributing to the development of their production models.
Yzf R7 Origin:
The YZF-R7 (0W02) was specifically built to homologate Yamaha's entry into the WSBK championship. It was essentially a road-legal version of their factory race bike.
Production Run:
Limited production run, particularly for the original 749cc homologation special, making it a collector's item.
Manufacturing Location:
Japan
