Model Year Range:
1999, 2000, 2001, 2002, 2003, 2004, 2005
Generation Identifier:
2nd Generation (4-valve SOHC)
Chassis Code:
Often referred to by engine type or specific sub-model, but generally associated with the 4-valve, air-cooled, single-cylinder design prevalent in this era.
Category:
Dual-Sport Motorcycle
Target User:
Off-road enthusiasts, trail riders, general recreational riders seeking robust maintenance capabilities.
Competitors:
Honda XR series, Kawasaki KLR series, Suzuki DR series of similar displacement and era.
Distinctive Features:
Renowned for its reliable air-cooled engine, robust chassis, and versatility for both trail riding and mild street use.
Manual Advantage:
Provides professional-level repair and maintenance guidance, empowering owners to perform extensive work, thus saving on dealership service costs.
Primary Coverage:
Full Service Repair and Maintenance
Secondary Coverage:
Diagnostics, Troubleshooting, Electrical Systems, Component Rebuilds
Estimated Page Count:
Detailed manuals of this nature for motorcycles of this complexity typically range from 300 to 600+ pages, depending on the level of detail for each section.
Type:
Full Service Repair Manual
Engine:
Engine disassembly, assembly, inspection, repair, top-end components (cylinder head, valves, camshaft), bottom-end components (crankshaft, connecting rod, piston), lubrication system, cooling system (if applicable), fuel system (carburetor).
Transmission:
Clutch operation and adjustment, gearbox disassembly, assembly, inspection, gear selection mechanism, shift drum, transmission bearings.
Chassis:
Frame inspection and repair, suspension (front forks, rear shock absorber), swingarm, bearings, steering system, brakes (front and rear hydraulic systems, calipers, master cylinders, pads, rotors), wheels, tires.
Electrical:
Ignition system, charging system (stator, rectifier/regulator), starting system (starter motor, solenoid), lighting system (headlight, taillight, turn signals), wiring diagrams, component testing, fault diagnosis.
Fuel System:
Carburetor disassembly, cleaning, adjustment, jetting, fuel tank, fuel lines, petcock.
Exhaust System:
Exhaust pipe inspection, muffler, heat shields, gasket replacement.
Maintenance:
Routine checks, oil changes, filter replacement, chain adjustment, brake adjustments, valve clearance checks and adjustment, spark plug replacement.
Repair:
Detailed step-by-step instructions for component removal, installation, and overhaul for all major systems.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and uncommon problems, including electrical troubleshooting with wiring diagrams.
Rebuilds:
Complete engine and transmission rebuild procedures, including component specifications for wear limits and tolerances.
Diagnostics:
Procedures for diagnosing electrical faults, engine performance issues, and mechanical problems.
Depth Level:
Comprehensive (Professional Technician Level)
Detail Level:
Includes detailed sub-steps, notes, cautions, and warnings for critical information.
Illustrations:
Abundant detailed illustrations, drawings, and photos, with enlarged inset views for specific parts.
Engine Type:
4-Stroke, Air-Cooled, DOHC, 4-Valve
Displacement:
249 cc (Cubic Centimeters)
Bore X Stroke:
Specifications vary slightly by specific model year but are typically around 73.0 mm x 59.5 mm.
Compression Ratio:
Around 10.5:1 (specifics may vary by sub-model).
Horsepower:
Typically in the range of 20-25 HP, depending on tuning and specific year.
Torque:
Estimated torque figures would be in the range of 18-20 Nm (Newton-meters).
Carburetor Type:
Single Mikuni carburetor (e.g., VM28 or similar).
Fuel Type:
Unleaded Gasoline
Infotainment System:
N/A (This is a performance-oriented dual-sport motorcycle, not equipped with infotainment features).
Assistance Features:
N/A (No electronic driver assistance systems like ABS or traction control are featured on this model).
Connectivity Options:
N/A (No connectivity features available).
Dashboard Features:
Analog speedometer, tachometer, odometer, trip meter, and indicator lights for neutral, high beam, and turn signals.
Oil Change Interval:
Typically every 2,000 - 3,000 km (1,200 - 1,800 miles) or as specified in the manual for optimal engine life.
Valve Clearance Interval:
Recommended every 6,000 - 8,000 km (3,700 - 5,000 miles), or annually, as valve seats can wear.
Chain Maintenance:
Regular cleaning and lubrication (every 500-1000 km or after off-road use), tension adjustment as needed.
Engine Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher) - specific viscosity may vary by climate.
Engine Oil Capacity:
Approximately 1.6 liters (1.7 US qt) with filter change, 1.4 liters (1.5 US qt) without filter change. Exact capacity should be confirmed in the manual.
Brake Fluid Type:
DOT 4 Hydraulic Brake Fluid.
Coolant Type:
N/A (Air-cooled engine).
Common Wear Items:
Clutch plates, brake pads, fork seals, carburetor diaphragms, wheel bearings, swingarm bearings, chain and sprockets.
Potential Problems:
Carburetor gumming from fuel degradation if left sitting, potential for wear in the transmission if not properly maintained, kickstart mechanism wear.
Key Practices:
Regular cleaning after off-road use to prevent corrosion and mud buildup, proper chain tensioning, timely fluid changes.
Brand Legacy:
Yamaha has a long and successful history in motorcycle manufacturing, known for performance, innovation, and durability across various disciplines.
Ttr Lineage:
The TTR series represents Yamaha's commitment to off-road performance, with the TTR 250 evolving from earlier models to offer a balance of power, handling, and reliability.
Production Period:
The TTR 250 was produced for several years, with this manual specifically covering the 1999-2005 models, which represent a significant iteration of the platform.