Target Audience:
Owners, recreational riders, junior racers, and mechanics of the 2008 Yamaha TT-R125E/L/LE.
Value Proposition:
Provides essential technical data and repair procedures to maintain and fix the specific 2008 TT-R125 models, saving money on dealership services.
Manual Purpose:
Empower owners with the knowledge to perform routine maintenance, diagnostics, and repairs themselves.
Included Models:
Specifically covers the TT-R125E (Electric Start), TT-R125L (Kick Start, Larger Wheels), and TT-R125LE (Electric Start, Larger Wheels).
Engine:
Engine assembly, disassembly, inspection, lubrication, cooling, starting and ignition systems, fuel system, exhaust system, carburetor.
Transmission:
Clutch operation and adjustment, transmission gear inspection and replacement, shift mechanism.
Drivetrain:
Drive chain inspection, adjustment, and replacement; rear sprocket and front sprocket maintenance.
Chassis:
Frame inspection and repair, front fork (telescopic suspension) maintenance and overhaul, rear shock absorber inspection and replacement, steering system.
Brakes:
Front and rear brake system maintenance (drum or disc brakes depending on variant), brake fluid replacement, caliper and master cylinder service, brake pad inspection and replacement.
Electrical:
Ignition system troubleshooting, lighting system, battery maintenance, wiring diagrams, charging system.
Fuel System:
Carburetor disassembly, cleaning, adjustment (jetting), fuel tank and petcock maintenance.
Wheels And Tires:
Tire inspection, replacement, wheel bearing maintenance, spoke tension adjustment.
Bodywork:
Seat removal and installation, fender maintenance, fuel tank cover, side covers.
Preventive Maintenance:
Scheduled maintenance checks, lubrication points, filter replacement, bolt torque checks.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting guides.
Repair Procedures:
Step-by-step instructions for component disassembly, repair, and reassembly.
Adjustment Procedures:
Carburetor idle adjustment, clutch lever free play, brake lever free play, chain slack adjustment.
Diagnostic Procedures:
Spark plug analysis, compression testing, ignition timing checks.
Depth:
Complete overhaul and rebuild procedures for all major components. Suitable for experienced DIY mechanics and professional technicians.
Engine Type:
4-stroke, SOHC, 2-valve
Bore X Stroke:
54 mm x 54 mm
Cooling System:
Air-cooled
Horsepower Estimate:
~10-12 HP (estimated, actual figures vary and are not typically published by Yamaha for this class)
Torque Estimate:
~7-8 lb-ft (estimated)
Carburetor Model:
Mikuni VM20
Fuel Type:
Unleaded Gasoline
Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher 4-stroke motorcycle oil)
Oil Capacity:
0.9 L (0.95 US qt) without filter change; 1.0 L (1.06 US qt) with filter change
Ignition System:
CDI (Capacitor Discharge Ignition)
Overall Length:
1845 mm (72.6 in) for TT-R125L/LE; 1790 mm (70.5 in) for TT-R125E
Overall Width:
810 mm (31.9 in)
Overall Height:
1065 mm (41.9 in) for TT-R125L/LE; 1050 mm (41.3 in) for TT-R125E
Seat Height:
805 mm (31.7 in) for TT-R125L/LE; 775 mm (30.5 in) for TT-R125E
Wheelbase:
1270 mm (50.0 in) for TT-R125L/LE; 1250 mm (49.2 in) for TT-R125E
Wet Weight:
93 kg (205 lbs) for TT-R125L/LE; 92 kg (203 lbs) for TT-R125E (approximate, includes all necessary fluids and a full tank of fuel)
Dry Weight:
86 kg (190 lbs) for TT-R125L/LE; 85 kg (187 lbs) for TT-R125E (approximate)
Fuel Capacity:
7.0 L (1.8 US gal)
Safety Features Description:
As an off-road only motorcycle, dedicated safety ratings (like NHTSA or Euro NCAP) are not applicable. Safety relies on rider skill, proper gear, and the mechanical integrity of the machine, all detailed in the service manual.
Braking System:
Front: Drum or Disc (depending on E/L/LE variant); Rear: Drum brake. Manual provides maintenance for optimal performance.
Suspension Design:
Front: Telescopic fork; Rear: Swingarm with Monocross suspension. Manual guides on proper setup and maintenance.
Oil Change:
Recommended every 1,000 km (600 miles) or 6 months, whichever comes first. Consult manual for specific off-road usage recommendations.
Air Filter Cleaning:
Recommended every 10-15 hours of use, or more frequently in dusty conditions. Manual details cleaning and oiling procedures.
Spark Plug Check:
Recommended every 1,000 km (600 miles) or annually. Manual provides inspection and gap setting.
Chain Lubrication Adjustment:
Weekly or every 500 km (300 miles), and adjustment as needed. Manual details slack measurement and adjustment.
Engine Oil Grade:
SAE 10W-30 API SG or higher 4-stroke motorcycle oil (e.g., Yamalube)
Brake Fluid Type:
DOT 3 or DOT 4 (check specific reservoirs, manual will clarify)
Carburetor Clogging:
Common in off-road bikes due to fuel sitting; requires regular cleaning and proper fuel storage. Manual details carburetor cleaning procedure.
Chain Wear:
Normal wear and tear, requires regular adjustment and lubrication. Manual details chain replacement.
Suspension Seals:
Can degrade over time, leading to leaks. Manual covers fork seal replacement.
Electrical Connections:
Corrosion can occur with off-road use. Manual assists in diagnosing and cleaning connections.
Yamaha Motorcycles:
Yamaha Motor Company is renowned for its long history in motorcycling, from its early days with the YA-1 to its dominance in various racing disciplines and development of innovative street and off-road bikes.
Ttr Series:
The TT-R series represents Yamaha's commitment to entry-level and intermediate off-road riding, offering reliable and user-friendly machines. The 125cc class is a staple for youth riders and beginners.
Tt R125 Production Years:
The TT-R125 platform has been in production for many years, with various updates and configurations like the 2008 E, L, and LE models, catering to different rider preferences (electric vs. kick start, wheel sizes).
