Target Audience:
Professional technicians and advanced DIY enthusiasts
Value Proposition:
Provides factory-level repair and maintenance information, empowering owners to perform complex tasks
Comparison To Paper:
Functionally identical to paper manuals, offering the advantage of instant access and portability
Availability:
Often more comprehensive than manuals found in retail stores, potentially including factory-specific data
Feature 1:
Step-by-step repair procedures
Feature 2:
Critical specifications and tolerances
Feature 3:
Detailed illustrations and diagrams
Feature 4:
Maintenance schedules and procedures
Feature 5:
Disassembly, assembly, cleaning, and reinstallation guidance
Engine:
Complete engine overhaul, disassembly, assembly, diagnostics, tuning, top-end, bottom-end, cooling system
Transmission:
Clutch, gearbox, shifting mechanisms, internal components, maintenance, repair
Fuel System:
Carburetor (likely Keihin FCR or similar), fuel pump, fuel lines, fuel tank, fuel filter, tuning
Electrical System:
Ignition system, lighting, charging system, battery, starter motor, wiring diagrams, troubleshooting
Suspension:
Front forks (e.g., upside-down), rear shock absorber, linkage, adjustments, seal replacement, oil changes
Brakes:
Front and rear brake systems, hydraulic lines, calipers, master cylinders, brake fluid, pad replacement, bleeding
Chassis And Frame:
Frame inspection, fork guards, swingarm, chain and sprockets, wheel bearings, steering head bearings
Bodywork:
Plastics, seat, fuel tank cover, fenders, graphics, removal and installation
Lubrication System:
Oil change procedures, oil filter replacement, oil specifications, crankcase lubrication
Cooling System:
Radiator, coolant, hoses, water pump, thermostat, bleeding the system
Maintenance:
Routine checks, oil changes, filter replacements, chain lubrication, bolt torquing
Troubleshooting:
Diagnostic flowcharts, symptom-based problem solving, common issues
Repair:
Detailed step-by-step instructions for component repair and replacement
Disassembly And Assembly:
Complete breakdown and reassembly of all major and minor vehicle components
Cleaning And Reinstallation:
Specific procedures for cleaning parts during disassembly and proper reinstallation
Depth:
Factory-level detail, suitable for professional technicians and experienced DIY mechanics
Diagnostics:
In-depth diagnostic procedures, including electrical troubleshooting and mechanical checks
Specifications:
Critical torque values, tolerances, adjustments, and fluid capacities
Illustrations And Diagrams:
Includes clear illustrations, exploded views, and detailed wiring diagrams
Engine Type:
Liquid-cooled, 4-stroke, DOHC, 4-valve
Displacement:
250cc (Specific bore and stroke would be detailed in manual)
Bore X Stroke:
Details provided in manual
Compression Ratio:
Details provided in manual
Horsepower:
Approx. 30-35 HP (Varies slightly by year/tune, specific figures in manual)
Torque:
Details provided in manual
Fuel Delivery:
Carburetor (e.g., Keihin FCR series, specific model in manual)
Fuel Type:
Unleaded gasoline (Octane rating specified in manual)
Oil Type:
Yamalube or equivalent motorcycle-specific 4-stroke oil (Viscosity and API rating in manual)
Coolant Type:
Permanent anti-freeze coolant (Ethylene Glycol based, specific mix ratio in manual)
Length:
Details specific to each model year in manual
Width:
Details specific to each model year in manual
Height:
Details specific to each model year in manual
Dry Weight:
Approx. 235-245 lbs (107-111 kg) (Varies by year, specific figure in manual)
Wet Weight:
Details in manual
Fuel Capacity:
Approx. 2.1 gallons (8.0 L) (Check manual for exact year)
Front Tire Size:
80/100-21 51M (Typical, check manual)
Rear Tire Size:
110/100-18 64M (Typical, check manual)
Wheel Type:
Spoked, Aluminum Rims
Oil Change Interval:
Refer to manual, typically every 1000-1500 miles or annually, whichever comes first. Shorter intervals for hard use.
Air Filter Cleaning:
Regular checks and cleaning, especially in dusty conditions. Details in manual.
Chain Maintenance:
Lubrication and tension adjustment every 300-500 miles. Refer to manual for exact procedure and tension spec.
Spark Plug Replacement:
Refer to manual, typically every 3000-5000 miles or as needed based on condition.
Valve Clearance Check:
Refer to manual, typically every 6000-8000 miles or based on symptoms.
Engine Oil Capacity:
Approx. 1.2-1.3 L (Check manual for exact specification and fill level)
Brake Fluid Type:
DOT 4 recommended (Consult manual for specific Yamaha recommendation)
Coolant Capacity:
Approx. 0.7-0.8 L (Check manual for exact specification)
Common Issues:
Carburetor tuning can be sensitive to altitude/temperature, clutch wear with aggressive use, potential for fork seal leaks if not maintained.