Motorcycle Segment:
Supersport / Performance Motorcycle
Intended Use:
Sport riding, track days, and performance road use.
Competitors 1999:
Honda CBR600F, Suzuki GSX-R600, Kawasaki ZX-6R Ninja.
R7 Distinction:
Unique 750cc displacement in a 600cc class segment, derived from endurance racing technology (OW-02).
Engine Architecture:
Inline-four cylinder, liquid-cooled, DOHC, 20 valves.
Frame Type:
Deltabox II aluminum twin-spar frame.
Suspension:
Fully adjustable front forks (e.g., 43mm diameter) and adjustable rear monoshock.
Brakes:
Dual 298mm front discs with radial-mount calipers, 245mm rear disc.
Engine Mechanical:
Complete disassembly, inspection, repair, and reassembly of engine components including cylinders, pistons, crankshaft, camshafts, valves, and related systems.
Engine Management:
Detailed coverage of the fuel injection system (EFI), ignition timing, sensors, actuators, and troubleshooting of electronic control unit (ECU) related issues.
Drivetrain:
In-depth procedures for the transmission, clutch assembly (including diaphragm spring, plates, and housing), and final drive mechanism.
Chassis And Frame:
Information on frame inspection, alignment checks, and repair procedures for the main frame, sub-frame, and swingarm.
Suspension And Steering:
Comprehensive guides for front fork disassembly, servicing, seal replacement, rear shock absorber servicing, and steering head bearing maintenance and adjustment.
Braking System:
Detailed instructions for front and rear brake caliper servicing, master cylinder overhaul, brake pad replacement, fluid bleeding, and inspection of brake lines.
Electrical And Ignition:
Extensive coverage of the entire electrical system, including battery, charging system (stator, regulator/rectifier), starter motor, ignition coil, and all lighting and ancillary circuits with detailed wiring diagrams.
Fuel And Carburetion:
Detailed procedures for fuel pump, fuel filter, fuel injectors, and associated components. (Note: While often fuel-injected, historically some sports bikes had carburetors, but R7 is EFI).
Routine Maintenance:
Oil changes, filter replacements, spark plug checks and replacement, chain adjustment, brake fluid checks, and coolant checks.
Scheduled Maintenance:
Detailed service intervals for all major components and systems as recommended by Yamaha.
Engine Rebuild:
Complete step-by-step instructions for engine disassembly, inspection, measurement of wear, component replacement, and reassembly for a full engine overhaul.
Transmission Overhaul:
Procedures for transmission gear inspection, synchro ring checks, bearing replacement, and gearbox reassembly.
Suspension Fork Rebuild:
Detailed guide to replacing fork seals, dust seals, guide bushings, and changing fork oil, including specific oil levels and types.
Brake System Repair:
Instructions for caliper piston removal/cleaning, seal replacement, master cylinder bleeding procedures, and rotor inspection.
Electrical Troubleshooting:
Systematic diagnostic approaches for electrical faults, using wiring diagrams to trace issues with starter, charging, ignition, and lighting circuits.
Fuel System Diagnosis:
Troubleshooting fuel delivery issues, injector pulse testing, and sensor diagnostic procedures.
Chassis Alignment:
Methods for checking and correcting chassis and frame alignment.
Wheel Bearing Replacement:
Guidance on removing and installing wheel bearings for front and rear wheels.
Body Panel Removal And Installation:
Instructions for removing and refitting fairings, body panels, and associated fasteners.
Depth:
Comprehensive (A-Z) covering all diagnostic and repair procedures, suitable for professional technicians.
Detail Level:
High, with detailed diagnostics and repair procedures.
Diagnostic Tools:
Implied use of standard automotive diagnostic tools and measurement equipment.
Engine Type:
Liquid-cooled, four-stroke, DOHC, 5-valve per cylinder inline-four.
Displacement:
749 cc (cc)
Bore X Stroke:
72.0 mm x 46.0 mm (mm x mm)
Compression Ratio:
11.5:1
Horsepower:
Approx. 106 hp @ 10,000 rpm (Note: Actual figures vary by market and tuning)
Torque:
Approx. 7.7 kg-m (75.5 Nm / 55.7 lb-ft) @ 9,000 rpm (Note: Actual figures vary by market and tuning)
Fuel Delivery:
Electronic Fuel Injection (EFI) with dual injectors per cylinder.
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/2).
Oil Type:
Yamaha Genuine 4-S Scooter Oil or equivalent SAE 10W-40 API SG or higher, JASO MA certified.
Oil Capacity:
3.6 L (3.8 US qt) / 4.0 L (4.2 US qt) with filter change.
Coolant Type:
Yamaha Yamalube Coolant or equivalent ethylene glycol-based coolant with deionized water (50:50 ratio).
Engine Oil Filter Change:
Every 4,000 km (2,500 miles) or 6 months, whichever comes first.
Spark Plug Inspection:
Every 4,000 km (2,500 miles).
Valve Clearance Check:
Every 16,000 km (10,000 miles).
Coolant Replacement:
Every 2 years.
Brake Fluid:
DOT 4 recommended.
Clutch Fluid:
DOT 4 recommended (if hydraulic clutch).
Electrical Connectors:
Some early models might have corrosion issues with electrical connectors if not properly maintained or exposed to harsh conditions.
Cam Chain Tensioner:
While generally robust, the cam chain tensioner is a wear item and can become noisy over time; replacement is a common maintenance item.
Fuel Injection System:
Proper maintenance of fuel injectors and fuel filter is crucial for optimal performance of the EFI system.
