Manual Coverage
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Systems Covered
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Engine:
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Complete coverage of the V4 engine, including internal components, lubrication, cooling, fuel delivery, and ignition systems.
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Transmission:
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Detailed information on the gearbox, clutch operation, and final drive (shaft drive).
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Brakes:
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Front and rear brake system diagnostics, caliper overhaul, fluid replacement, and component specifications.
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Electrical System:
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Comprehensive wiring diagrams, charging system, ignition system troubleshooting, lighting, and accessory circuits.
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Suspension And Steering:
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Front fork (telescopic) and rear suspension (monoshock or dual shock depending on sub-model) disassembly, assembly, and adjustment procedures. Steering head bearing service.
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Fuel System:
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Carburetor servicing, fuel tank, fuel pump (if applicable), and fuel lines.
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Exhaust System:
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Exhaust pipe and muffler maintenance, component identification.
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Frame And Bodywork:
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Frame inspection, body panel removal and installation, seat, tank, and fairing details.
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Procedures Included
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Routine Maintenance:
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Oil and filter changes, spark plug replacement, air filter cleaning/replacement, drive shaft lubrication, brake fluid flush, coolant check/replacement.
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Troubleshooting:
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Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
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Engine Rebuild:
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Detailed instructions for engine disassembly, inspection of internal components (pistons, rings, valves, crankshaft), and reassembly.
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Transmission Repair:
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Gearbox disassembly, gear inspection, shift drum and fork alignment, and clutch pack service.
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Carburetor Tuning And Rebuild:
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Step-by-step guides for carburetor cleaning, jetting, synchronization, and diaphragm replacement.
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Electrical Diagnostics:
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Testing of stator, regulator/rectifier, starter motor, battery, and troubleshooting of wiring faults using diagrams.
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Suspension Overhaul:
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Fork seal replacement, oil level and viscosity specifications, shock absorber servicing.
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Brake System Maintenance:
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Bleeding procedures, caliper piston service, and master cylinder overhaul.
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Technical Depth
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Diagnostic Capabilities:
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Advanced diagnostic information for electrical and mechanical systems, including specific resistance and voltage readings.
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Repair Level:
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Full workshop-level repair procedures, suitable for professional mechanics and experienced DIY enthusiasts.
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Specification Detail:
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Inclusion of precise torque specifications, clearances, fluid capacities, and resistance values for all major components.
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Engine Specifications
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Primary Engine
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Engine Type:
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Liquid-cooled, four-stroke, DOHC, 4 valves per cylinder, V-four
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Displacement:
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1198 cc (73.1 cu. in.)
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Bore X Stroke:
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76 mm x 66 mm (3.0 in x 2.6 in)
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Compression Ratio:
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10.5:1
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Performance
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Horsepower:
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Approx. 145 hp (108 kW) @ 8,500 rpm (varies by market and tuning)
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Torque:
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Approx. 12.7 kg-m (92 ft-lb) @ 6,500 rpm (varies by market and tuning)
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Fuel System
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Carburetion:
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Four Mikuni BS36 (or similar) constant velocity carburetors
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Fuel Capacity:
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15 Liters (3.96 US gallons)
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Lubrication System
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Oil Type:
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Yamalube 4 (or equivalent SAE 10W-40 API SG or higher, JASO MA)
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Oil Capacity:
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Approx. 4.1 Liters (4.3 US qt) with filter change
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Ignition System
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Ignition Type:
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TCI (Transistor Controlled Ignition)
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Cooling System
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Cooling Medium:
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Water-cooled
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Coolant Type:
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Yamaha Yamacoolant (or equivalent ethylene glycol based antifreeze with corrosion inhibitor), 50/50 mix with distilled water
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Maintenance
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Service Intervals
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Oil And Filter Change:
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Recommended every 4,000-6,000 km (2,500-3,750 miles) or annually, whichever comes first.
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Spark Plug Replacement:
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Recommended every 10,000-12,000 km (6,000-7,500 miles).
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Air Filter Cleaning:
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Recommended every 4,000-8,000 km (2,500-5,000 miles), depending on riding conditions.
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Brake Fluid Replacement:
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Recommended every 2 years or as per manual due to hygroscopic nature.
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Coolant Replacement:
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Recommended every 2 years.
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Shaft Drive Lubrication:
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Recommended every 1,000 km (600 miles) or annually with specified grease.
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Fluid Specifications
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Engine Oil Viscosity:
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SAE 10W-40 API SG or higher, JASO MA
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Brake Fluid Type:
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DOT 4
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Coolant Mixture:
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50% ethylene glycol-based antifreeze with distilled water
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Known Issues
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Starter Clutch Wear:
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Some models can experience wear on the starter clutch mechanism, leading to difficult starting. The manual will detail inspection and replacement procedures.
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Carburetor Sync Drift:
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Carburetors may require periodic synchronization to maintain smooth engine running and optimal performance. Manual covers this procedure.
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Charging System Issues:
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Potential issues with the regulator/rectifier or stator windings. The manual provides diagnostic steps and specifications.
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Fuel Tap Diaphragm:
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The diaphragm within the fuel tap can degrade over time, affecting fuel flow. Manual details its replacement.
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