Motorcycle Segment:
Dual-sport / Off-road trailbike
Key Competitors:
Honda CRF230F, Kawasaki KLX250S, Suzuki DR-Z250
Vehicle Attributes:
Reliable air-cooled engine, user-friendly power delivery, capable off-road suspension, street-legal.
Dealer Equivalency:
Provides the same information and procedures used by authorized Yamaha dealerships for all repair and maintenance tasks.
Engine Service:
Complete overhaul, top-end, bottom-end, lubrication, cooling system, carburetion, exhaust.
Transmission Drivetrain:
Clutch operation, gear shifting mechanisms, final drive (chain and sprockets), gearbox disassembly and assembly.
Chassis Suspension:
Front fork (disassembly, sealing, fluid replacement), rear shock absorber (adjustment, overhaul), swingarm, linkages, bearings.
Braking System:
Front and rear brake caliper service, master cylinder overhaul, brake line replacement, bleeding procedures, pad and rotor specifications.
Electrical System:
Wiring diagrams, ignition system components (CDI, spark plug), lighting circuits, battery maintenance, charging system (stator, regulator/rectifier), starter motor.
Fuel System:
Carburetor disassembly, cleaning, jetting, float level adjustment, fuel tank inspection, fuel petcock service.
Frame Bodywork:
Frame inspection, plastics removal and installation, seat, fuel tank mounting, fenders.
Routine Maintenance:
Oil changes, filter replacements, chain adjustments, spark plug replacement, air filter cleaning/replacement, valve clearance checks and adjustments.
Troubleshooting Diagnostics:
Step-by-step diagnostic procedures for common performance issues, electrical faults, and mechanical problems.
Rebuilds Overhauls:
Detailed instructions for engine, carburetor, suspension, and brake system rebuilds.
Assembly Disassembly:
Comprehensive disassembly and reassembly procedures for all major components and sub-assemblies.
Depth Level:
Factory-level diagnostic and repair procedures, suitable for professional mechanics and experienced DIY enthusiasts.
Engine Type:
Four-stroke, SOHC, air-cooled
Displacement:
249 cc (15.2 cu. in.)
Bore X Stroke:
73.0 mm x 59.5 mm (2.87 in. x 2.34 in.)
Estimated Horsepower:
Approximately 20-22 HP (at crank, dependent on tuning)
Estimated Torque:
Approximately 15-17 lb-ft (at crank, dependent on tuning)
Carburetor Type:
Mikuni BSR33, 33mm, flat-slide, CV type
Fuel Capacity:
2.6 gal (9.8 L)
Ignition System:
Digital CDI
Oil Type Specification:
Yamalube 4 or equivalent SAE 10W-40 API SE, SF, or SG
Cooling Method:
Air-cooled
Transmission Type:
Constant-mesh, 6-speed
Clutch Type:
Wet, multi-plate
Gear Ratios:
1st: 2.571, 2nd: 1.813, 3rd: 1.350, 4th: 1.130, 5th: 0.960, 6th: 0.850
Final Drive:
Sealed O-ring chain, 520 pitch
Transmission Oil Type:
Yamalube 4 or equivalent SAE 10W-40 API SE, SF, or SG
Dashboard Features:
Analog speedometer, odometer, tripmeter, neutral indicator, high-beam indicator, turn signal indicators.
ABS Availability:
Not equipped with ABS.
Connectivity Features:
N/A (Basic motorcycle electronics)
Engine Oil Change Interval:
Every 1,000 miles (1,600 km) or 6 months, whichever comes first.
Oil Filter Replacement Interval:
Every 1,000 miles (1,600 km) or 6 months.
Air Filter Cleaning Interval:
Every 600 miles (1,000 km) or as needed in dusty conditions.
Valve Clearance Check Interval:
Every 3,000 miles (5,000 km) or 12 months.
Chain Lubrication Adjustment:
Every 300 miles (500 km) or after washing/wet riding.
Engine Oil Capacity:
1.60 L (1.70 US qt) without filter change; 1.80 L (1.90 US qt) with filter change.
Fork Oil Type:
Yamaha Fork Oil G10 or equivalent (e.g., Showa SS-8 or Bel-Ray SAE 5W)
Fork Oil Level:
118 mm (4.65 in)
Common Wear Items:
Clutch plates, wheel bearings, steering head bearings, fork seals, chain and sprockets.
Potential Performance Quirks:
Carburetor jetting may need adjustment for altitude or modifications. Stock exhaust can be restrictive.
Motorcycle Focus:
Yamaha has a long and successful history in off-road and dual-sport motorcycles, known for performance and reliability.
Tt R Series Lineage:
The TT-R series represents Yamaha's commitment to accessible and capable trail riding, building upon previous TT and TTR models.
Initial Production Year:
1998
Model Life Cycle:
The TT-R250 was produced for many years with updates, making it a consistent player in its segment.
Motorcycle Journal Awards:
While specific awards for the 2004 model may not be widely documented, the TT-R250 has consistently received praise in motorcycle reviews for its reliability and suitability as a trail-riding platform.
User Satisfaction Ratings:
Generally high user satisfaction reported for its intended use as a durable and easy-to-maintain trail bike.
