Vehicle Segment:
Dual-sport motorcycle
Target Audience:
Off-road enthusiasts, trail riders, adventure seekers, dual-sport commuters.
Key Competitors:
Honda CRF250L, Kawasaki KLX250S, Suzuki DR-Z250, KTM EXC series (though typically higher-spec).
Vehicle Purpose:
Versatile motorcycle capable of handling both on-road and off-road terrain.
Manual Benefit:
Empowers owners to perform maintenance, repairs, and troubleshooting confidently, reducing reliance on dealerships.
Manual Value Proposition:
Essential resource for maximizing performance, longevity, and resale value of the TT-R250.
Manual Type:
Service Manual / Repair Manual & Owner's Manual
Covered Years:
1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Format:
Digital (Likely PDF)
Service Manual Estimated Pages:
Approx. 300-400+
Owner Manual Estimated Pages:
Approx. 50-100+
Engine Mechanical:
Top-end (cylinder, piston, valves), bottom-end (crankshaft, connecting rod, bearings), lubrication, cooling system.
Fuel System:
Carburetor (cleaning, adjustment, overhaul), fuel tank, fuel lines, fuel filter.
Ignition System:
CDI unit, ignition coil, spark plug, wiring.
Transmission Drivetrain:
Clutch operation and adjustment, gearbox internals, shifting mechanism, final drive (chain, sprockets).
Suspension:
Front forks (disassembly, seal replacement, oil level/viscosity), rear shock absorber (rebuild, adjustments).
Brakes:
Front and rear brake systems (hydraulic lines, master cylinders, calipers, brake pads, disc inspection), bleeding procedures.
Electrical System:
Wiring diagrams, lighting (headlight, taillight, indicators), battery, charging system (stator, regulator/rectifier), starter motor, switches.
Chassis Frame:
Frame inspection, steering head bearings, wheel bearings, swingarm bushings.
Bodywork:
Panel removal/installation, seat, fenders, fuel tank mounting.
Scheduled Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks, air filter cleaning/replacement, valve clearance checks/adjustment.
Troubleshooting:
Diagnostic flowcharts, common problems and their causes, solutions for starting issues, running problems, electrical faults.
Repair Procedures:
Step-by-step instructions for component removal, disassembly, inspection, repair, and reassembly.
Overhaul Instructions:
Detailed procedures for engine and transmission disassembly/reassembly.
Technical Specifications:
Torque values, clearances, fluid capacities, electrical resistance values, performance data.
Depth Level:
Comprehensive (suitable for DIY mechanics and professional technicians).
Diagnostic Capabilities:
Advanced diagnostic procedures, electrical testing methods, troubleshooting guides.
Rebuild Information:
Detailed instructions for complete engine, transmission, and suspension rebuilds.
Searchability:
Likely text-searchable PDF for quick information retrieval.
Image Quality:
High-resolution diagrams and photographs for clarity.
Printing Suitability:
Designed for clear printing of diagrams and text.
Physical Manual Binding:
Not applicable for digital format, but quality implies suitable for binding if printed.
Physical Manual Paper:
Not applicable for digital format, but quality implies suitable for durable paper if printed.
Engine Type:
4-stroke, SOHC, 4-valve
Engine Displacement:
249 cc
Bore X Stroke:
73.0 mm x 59.5 mm
Compression Ratio:
11.6:1
Cooling System:
Liquid-cooled
Horsepower:
Approx. 20-25 HP (model specific variations)
Torque:
Approx. 15-18 lb-ft (model specific variations)
Carburetor Type:
Mikuni BSR33, Constant Velocity (CV)
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40, API SG or higher, JASO MA)
Safety Ratings:
Not applicable (motorcycle, typically not rated by NHTSA/Euro NCAP)
Braking System:
Front: Disc brake; Rear: Disc brake. Anti-lock Braking System (ABS) not available.
Lighting:
Halogen headlight, LED taillight/brake light, incandescent turn signals.
Frame Construction:
Steel semi-double cradle frame for stability and impact resistance.
Ergonomics:
Designed for comfortable rider control and visibility in varied terrain.
Engine Oil Change:
Every 3,000 km (1,800 miles) or 6 months, whichever comes first.
Oil Filter Replacement:
Every 6,000 km (3,600 miles) or 12 months.
Air Filter Cleaning:
Every 1,000 km (600 miles) or 3 months, or more frequently in dusty conditions.
Valve Clearance Check:
Every 6,000 km (3,600 miles) or 12 months.
Spark Plug Inspection:
Every 3,000 km (1,800 miles) or 6 months.
Chain Lubrication Adjustment:
Every 500 km (300 miles) or after riding in wet conditions.
Engine Oil Specification:
Yamalube 4 (or equivalent SAE 10W-40, API SG or higher, JASO MA).
Fork Oil Type:
Yamaha Fork Oil (or equivalent 10W viscosity) - specify capacity per fork leg.
Common Wear Items:
Clutch plates, chain and sprockets, wheel bearings, steering head bearings, fork seals.
Carburetor Tuning:
Carburetor can sometimes require fine-tuning or cleaning due to its age and potential for deposits, especially if fuel quality varies.
Electrical Connections:
Corrosion on electrical connectors can be an issue, especially in humid or salty environments, affecting lighting and ignition.
Suspension Maintenance:
Regular fork seal and oil maintenance is crucial for optimal performance and preventing leaks.
Manufacturer History:
Yamaha Motor Company, a Japanese manufacturer with a long history in motorcycles, audio, and marine products.
Tt R Series Lineage:
Part of Yamaha's popular TT-R line of off-road motorcycles, known for reliability and trail-worthiness.
Tt R250 Introduction:
Introduced to offer a more accessible, trail-focused 250cc dual-sport option.
Production Years:
1993-2006 (major iterations, with this manual covering 1999-2006 variants)
Manufacturing Location:
Japan
