Model Variants:
TTR125, TTR125E, TTR125M, TTR125LW
Model Codes:
M (1999), N (2000), P (2001), R (2002), 2004, 2005, 2006
Generation Designation:
First Generation
Generation Years:
1999-2006
Positioning:
Entry-level to intermediate off-road motorcycle, popular for trail riding and recreational use.
Competitors:
Honda CRF150F, Kawasaki KLX140, Suzuki DR-Z125.
Features:
Reliable 125cc four-stroke engine, electric start option (E models), user-friendly power delivery, long-travel suspension, durable construction.
Value Proposition:
Provides authorized dealership-level repair and maintenance information at a fraction of the cost of professional services.
Covered Model Years:
1999, 2000, 2001, 2002, 2004, 2005, 2006
Covered Variants:
TTR125, TTR125E R, TTR125M, TTR125LW M, TTR125LW N, TTR125LW P, TTR125LW R
Individual Manual Page Counts:
2004: 611, 2005: 611, 2006: 617, 2002 (E R): 579, 1999 (M): 443, 2000 (LW M): 469, 2000 (LW N): 509, 2001 (LW P): 510, 2002 (LW R): 511
Type:
Factory Service Manual / Repair Manual
Format:
PDF (Digital Download)
Engine:
Complete engine overhaul, internal components, lubrication, cooling, fuel, ignition, exhaust systems
Transmission:
Clutch, gearbox, shifting mechanisms, maintenance and repair
Chassis:
Frame, suspension (front and rear), steering, wheels, tires, brakes (front and rear)
Electrical:
Wiring diagrams, lighting system, ignition system, charging system, battery, switches, sensors, troubleshooting
Bodywork:
Body panels, plastics, seating, levers, cables, maintenance and cosmetic repair
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug service, air filter cleaning, valve clearance checks
Troubleshooting:
Diagnostic charts, common problem identification, step-by-step fault finding procedures
Repair Procedures:
Detailed disassembly and reassembly instructions for all major components and systems
Component Overhaul:
Complete rebuild instructions for engine, transmission, carburetor, and suspension units
Depth:
Comprehensive, covering basic maintenance to full engine and transmission rebuilds, including electrical diagnostics.
Type:
4-stroke, SOHC, 2-valve
Displacement:
124cc (approximate, slight variations possible across years)
Bore X Stroke:
54.0 x 54.5 mm (typical)
Compression Ratio:
9.5:1 to 10.0:1 (typical, varies by year)
Horsepower:
Approximately 10-12 HP (estimated, not officially published for all years)
Torque:
Approximately 8-9 lb-ft (estimated)
Carburetor:
Mikuni VM20SS or similar (specific model may vary by year and variant)
Fuel Type:
Unleaded gasoline
Oil Type:
Yamaha Genuine Yamalube or equivalent SAE 10W-40 API service SG or higher, JASO MA.
System:
Forced air cooling
Overall Length:
Approximately 1840 mm (72.4 in) for standard models, longer for LW (Long Wheelbase) variants.
Overall Width:
Approximately 810 mm (31.9 in)
Overall Height:
Approximately 1065 mm (41.9 in)
Seat Height:
Approximately 795 mm (31.3 in) for standard, ~830mm for LW
Wheelbase:
Approximately 1260 mm (49.6 in) for standard, ~1290mm for LW
Wet Weight:
Approximately 94 kg (207 lbs) for standard models with all necessary fluids.
Safety Ratings:
N/A (Off-road motorcycle, not subjected to road vehicle safety ratings).
Braking System:
Front: Drum brake, Rear: Drum brake (some later or higher spec models may feature front disc brake - verify specific year/model)
Frame Construction:
Steel diamond frame for durability and rigidity.
Oil Change Interval:
Every 1000 km (600 miles) or 6 months, whichever comes first. Check manual for specific model year recommendations.
Air Filter Cleaning:
Every 500 km (300 miles) or 3 months. Service more frequently under dusty conditions.
Valve Clearance Check:
Every 6000 km (3600 miles) or 12 months.
Engine Oil Capacity:
Approximately 0.95 L (1.0 US qt) without oil filter change, 1.0 L (1.1 US qt) with oil filter change.
Brake Fluid:
DOT 3 or DOT 4 (verify specific drum brake fluid requirements in manual)
Common Wear Items:
Clutch plates, brake shoes, chain and sprockets, spark plug, air filter, carburetor jets due to fuel variations.
Typical Problems:
Carburetor gumming if fuel sits too long, chain wear, occasional electrical connection issues, worn suspension bushings.
Brand Focus:
Yamaha Motor Corporation is renowned for its diverse range of powersports products, including motorcycles, ATVs, and marine engines, known for reliability and performance.
Evolution Overview:
The TTR125 line was introduced to provide a capable and user-friendly off-road machine for younger riders or those seeking a lighter, more manageable trail bike. Key developments included the introduction of electric start (E models) and longer wheelbase (LW) variants for improved stability and taller rider comfort.
Production Period:
1999-2006 for the covered models. Production continued with updates beyond 2006.
Manufacturing Location:
Japan (typical for Yamaha's core models)
