Segment:
Mid-size Japanese sport-touring motorcycle.
Competitors 1980S:
Honda CB750F/C, Suzuki GS750/GSX750, Kawasaki KZ750/GPz750.
Engine Layout:
Inline-four cylinder, DOHC, liquid-cooled.
Drive System:
Shaft drive, offering low maintenance compared to chain drive.
Suspension Type:
Monoshock rear suspension (a significant feature for its time).
Design Philosophy:
A blend of sportbike performance with touring comfort and reliability.
Engine Mechanical:
Engine assembly, disassembly, inspection, repair of cylinders, pistons, crankshaft, camshaft, valves, timing, lubrication system, cooling system.
Fuel System:
Carburetor disassembly, cleaning, adjustment, fuel pump, fuel filter, fuel tank.
Ignition System:
Ignition timing, spark plugs, coils, CDI unit, wiring.
Transmission:
Clutch operation, gearbox inspection, repair, gear shaft, shifting mechanism.
Drivetrain:
Shaft drive system, universal joints, final drive inspection and maintenance.
Suspension:
Front forks (telescopic), rear shock absorber (Monoshock system), swingarm, linkages.
Braking System:
Front and rear brake systems (disc brakes), brake fluid, master cylinder, calipers, hoses, bleeding procedures.
Electrical System:
Battery, charging system (alternator/stator, regulator/rectifier), starting system (starter motor), lighting system, instrumentation, wiring diagrams.
Chassis And Bodywork:
Frame inspection, steering head bearings, wheels, tires, body panel removal and installation, seat, handlebars.
Routine Maintenance:
Oil changes, filter replacement, chain adjustment (if applicable, though shaft drive), spark plug service, air filter cleaning/replacement, brake checks.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Engine Rebuild:
Complete engine overhaul procedures, including piston ring replacement, valve adjustments, gasket replacements.
Carburetor Tuning:
Detailed steps for cleaning, synchronizing, and adjusting carburetors for optimal performance.
Electrical Diagnostics:
Troubleshooting electrical faults using wiring diagrams, multimeter usage, component testing.
Suspension Servicing:
Fork seal replacement, oil changes, shock absorber inspection and replacement.
Brake Maintenance:
Brake pad replacement, caliper servicing, fluid flushing and bleeding.
Depth Of Information:
Comprehensive; covers everything from basic maintenance to full engine and chassis overhauls.
Diagnostic Capability:
Includes detailed troubleshooting charts and procedures.
Diagrams And Illustrations:
Expected to contain exploded views, wiring diagrams, and detailed illustrations for clarity.
Engine Type:
700cc, 4-stroke, Inline-Four Cylinder, DOHC, 16 Valves (4 per cylinder).
Bore X Stroke:
64.0 mm x 52.0 mm (typical for this engine family).
Cooling System:
Liquid-cooled.
Horsepower Estimated:
Approx. 70-80 HP @ 9000 RPM (varied slightly by year/tuning).
Torque Estimated:
Approx. 58-63 Nm @ 7000 RPM.
Carburetion:
Four Mikuni constant velocity (CV) carburetors (e.g., VM26 or similar).
Fuel Tank Capacity:
Approx. 18 Liters (4.8 US Gallons).
Oil Change Interval:
Typically every 5,000 km (3,000 miles) or 6 months, per manual.
Valve Adjustment Interval:
Typically every 10,000 km (6,000 miles) or annually, per manual.
Engine Oil Type:
Yamaha recommends SAE 20W-40 or 10W-30 API SE or SF classification motorcycle oil.
Engine Oil Capacity:
Approx. 3.0 Liters (3.2 US Quarts) with filter change, per manual.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Coolant Type:
Permanent type anti-freeze coolant (ethylene glycol base) mixed with distilled water.
Carburetor Issues:
CV carburetors can become finicky with age, requiring cleaning and synchronization for smooth operation.
Electrical Component Wear:
Regulator/rectifier units and stator windings can be points of failure over time.
Shaft Drive Maintenance:
Requires periodic checks and replenishment of final drive gear oil.
