Category:
Dual-sport motorcycle, trail bike
Target Audience:
Enthusiasts and owners seeking to maintain, repair, and understand their Yamaha TTR 250
Comparison:
Competes with other 250cc dual-sport and off-road motorcycles from manufacturers like Honda, Kawasaki, and Suzuki in its era.
Vehicle Type:
Off-road focused dual-sport motorcycle with capabilities for trail riding and light street use.
Engine Mechanical:
Complete disassembly, inspection, repair, and reassembly of engine components
Fuel System:
Carburetor overhaul, fuel tank, fuel lines, and fuel pump (if applicable)
Ignition System:
CDI, spark plug, ignition coil, and wiring
Transmission Drivetrain:
Gearbox, clutch, chain drive, and related components
Suspension:
Front forks (including oil changes, seal replacement, and spring adjustments), rear shock absorber, and linkage
Brakes:
Front and rear brake systems, including hydraulic lines, master cylinders, calipers, brake pads, and bleeding procedures
Electrical System:
Wiring diagrams, lighting system, battery, charging system (stator, regulator/rectifier), starter motor, and switches
Chassis Frame:
Frame inspection, steering head bearings, and swingarm
Cooling System:
Radiator, coolant hoses, and fan (if equipped)
Exhaust System:
Muffler, header pipe, and heat shields
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure recommendations
Troubleshooting:
Diagnostic flowcharts and common issue resolution
Periodic Maintenance:
Scheduled maintenance tasks and intervals
Estimated Pages:
Approximately 300-400 pages (estimated for comprehensive coverage)
Type:
Factory Service Manual (FSM) / Repair Manual
All Systems:
Covers all major mechanical, electrical, and chassis systems of the Yamaha TTR 250 (1999 model)
Repair Procedures:
Detailed step-by-step repair instructions for all components
Maintenance Procedures:
Routine maintenance tasks, adjustments, and replacements
Troubleshooting Procedures:
Diagnosis of common problems and fault finding
Diagnostic Procedures:
Procedures for identifying and rectifying issues within various systems
Depth:
Comprehensive, suitable for professional technicians and experienced DIY mechanics, covering everything from basic maintenance to complete engine rebuilds
Engine Type:
Four-stroke, SOHC, 2-valve
Bore X Stroke:
73.0 mm x 59.6 mm
Cooling System:
Air-cooled
Horsepower:
Approximately 22-25 hp (estimated)
Torque:
Approximately 15-17 lb-ft (estimated)
Carburetor Type:
Mikuni VM28SS (or similar Keihin, depending on market)
Fuel Capacity:
Approx. 2.6 gallons (9.8 L)
Length:
Approx. 83.1 in (2110 mm)
Width:
Approx. 32.3 in (820 mm)
Height:
Approx. 48.2 in (1225 mm)
Wheelbase:
Approx. 56.1 in (1425 mm)
Ground Clearance:
Approx. 12.2 in (310 mm)
Dry Weight:
Approx. 271 lbs (123 kg)
Wet Weight:
Approx. 291 lbs (132 kg) (estimated, with fluids)
Seat Height:
Approx. 35.2 in (895 mm)
Safety Standards:
Designed to meet relevant off-road vehicle safety standards, as applicable by region
Braking System:
Hydraulic disc brakes front and rear for effective stopping power
Suspension Stability:
Robust suspension system designed for stability over varied terrain
Frame Construction:
Durable steel frame for rider protection and structural integrity
Oil Change Interval:
Every 3,000 km or 6 months (refer to manual for specific conditions)
Air Filter Cleaning:
As needed, depending on riding conditions (more frequently in dusty environments)
Spark Plug Replacement:
Refer to manual; typically every 10,000-15,000 km
Valve Clearance Check:
Refer to manual; typically every 6,000-12,000 km
Engine Oil:
Yamalube 4 (or equivalent API SG, SAE 10W-40 or 20W-40), Capacity: Approx. 1.4 L (without filter), 1.6 L (with filter)
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid
Coolant:
Mixture of antifreeze and distilled water (50/50 ratio)
Common Wear Items:
Clutch plates, brake pads, chain and sprockets, fork seals, and wheel bearings are common wear items requiring periodic replacement.
Carburetor Maintenance:
Carburetor can require cleaning and adjustment due to fuel residue or wear.
Electrical Connections:
Corrosion on electrical connectors, particularly in off-road environments, can lead to intermittent issues.
Heritage:
Yamaha's long-standing reputation for producing reliable and capable off-road motorcycles.
Model Lineage:
The TTR series is known for its robust, air-cooled engines, offering a blend of trail performance and ease of maintenance.
Specific Generation:
The 1999 model falls into a generation of TTR 250s that were praised for their versatility and user-friendly nature compared to more race-oriented bikes.
Production Period:
The TTR 250 was produced for many years, with the 1999 model being a significant iteration.
