Segment:
Competition Enduro Motorcycle
Target Audience:
Off-road enthusiasts, enduro riders, motocross riders seeking a versatile and competitive machine.
Key Competitors:
KTM EXC series, Honda CRF-X series, Kawasaki KLX-R series, Suzuki RM-Z models (depending on specific focus).
Engine Performance:
High-revving, potent 4-stroke engine optimized for off-road performance.
Suspension Capability:
Advanced, long-travel suspension systems designed for rough terrain and jumps.
Handling Agility:
Lightweight chassis and balanced design for exceptional maneuverability and control.
Durability Reliability:
Yamaha's reputation for robust engineering and reliable components.
Engine Mechanical:
Engine disassembly, assembly, inspection, tuning, carburetor/fuel injection system, cooling system, lubrication system.
Engine Electrical:
Ignition system, starting system, charging system, CDI unit, sensors, wiring diagrams.
Transmission Drivetrain:
Clutch, gearbox, final drive (chain and sprockets), internal transmission components, shift mechanism.
Chassis Suspension:
Front forks (including oil changes, seal replacement, internal adjustments), rear shock absorber, swingarm, linkage, steering system.
Brakes:
Front and rear brake systems, hydraulic lines, calipers, master cylinders, brake pads, brake fluid replacement, bleeding.
Wheels Tires:
Wheel bearing inspection and replacement, tire mounting and balancing, spoke tensioning, rim inspection.
Fuel System:
Fuel tank, fuel pump (if applicable), fuel filter, fuel lines, fuel injection system components (injectors, throttle body).
Exhaust System:
Exhaust pipes, muffler, heat shields, exhaust gasket replacement.
Electrical System:
Lighting, horn, battery, fuses, relays, wiring harness inspection and repair, diagnostic codes.
Bodywork Frame:
Fairings, fenders, seat, fuel tank cover, frame inspection and repair (if applicable to minor damage).
Routine Maintenance:
Oil changes, filter replacements, chain lubrication and adjustment, air filter cleaning/replacement, spark plug checks, valve clearance adjustments.
Troubleshooting:
Diagnostic flowcharts, common problems and their solutions, error code interpretation.
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement, electrical system diagnosis and repair.
Disassembly Assembly:
Step-by-step instructions for removing and installing all major components and sub-assemblies.
Specifications Data:
Torque specifications, clearances, fluid capacities, electrical resistance values, performance data.
Wiring Diagrams:
Detailed electrical schematics for all systems.
Depth:
Comprehensive, covering from basic maintenance to complete engine and chassis rebuilds.
Digital Format:
PDF (Portable Document Format)
Image Resolution:
High resolution (suitable for printing diagrams and illustrations).
Binding:
Not applicable for downloadable digital manual, but ideally spiral-bound for workshop use.
Paper Quality:
Not applicable for downloadable digital manual, but original manuals often printed on durable, coated paper.
Text Search:
Searchable text within PDF for quick information retrieval.
Engine Type:
4-Stroke, DOHC, liquid-cooled, 4-valve, single-cylinder
Displacement:
249cc (actual displacement may vary slightly based on internal modifications, but 250cc class is accurate)
Bore X Stroke:
77.0 mm x 53.6 mm (Typical for this generation)
Compression Ratio:
12.5:1 (Typical for this generation)
Horsepower:
Estimated 35-40 HP (at crankshaft, varies by specific year and tuning)
Torque:
Estimated 20-22 lb-ft (at crankshaft, varies by specific year and tuning)
Fuel Delivery:
Fuel Injection (Mikuni DFI or Keihin FCR with TPS, depending on specific year within the range)
Throttle Body Size:
Typically 42mm
Ignition:
Digital CDI with electronic advance
Starting System:
Electric Start
Oil Change Interval:
Refer to manual, typically every 10-15 hours of off-road riding or as recommended.
Air Filter Cleaning:
Frequent cleaning/replacement recommended, often after every few rides or based on dusty conditions.
Valve Clearance Check:
Refer to manual, typically every 100-150 hours of riding.
Engine Oil Type:
Yamalube (or equivalent high-quality 4-stroke motorcycle oil), SAE 10W-40, API SG or higher, JASO MA certified.
Engine Oil Capacity:
Approx. 1.0 Liter (without filter change) / 1.1 Liter (with filter change) - Refer to manual for exact figure.
Coolant Type:
High-quality, permanent type antifreeze coolant (Ethylene Glycol based) with distilled water. Mixture ratio 50:50.
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Common Wear Items:
Clutch plates, brake pads, chain and sprockets, wheel bearings, fork seals due to strenuous off-road use.
Potential Performance Tuning Considerations:
Users may explore ECU remapping or aftermarket exhaust systems for increased performance, which requires careful tuning and may affect reliability if not done correctly.
