Market Segment:
Entry-level off-road/trail motorcycle, popular for recreational riding and youth riders.
Target Audience:
Trail riders, beginners, youth riders, and those seeking an accessible and reliable off-road machine.
Key Competitors:
Honda CRF150F, Kawasaki KLX140, Suzuki DR-Z125.
Competitive Advantage:
Yamaha's reputation for reliability, ease of use, and capable off-road performance in its class.
Key Features:
Lightweight, user-friendly controls, durable 4-stroke engine, adjustable suspension (on LW models), electric start option (on some later variants, though likely kick-start only for 2002).
Coverage Years:
Primarily 2002, with notes for similar years
Specific Models Covered:
TTR125, TTR-125, TT-R125, TT-R125LW
Page Count:
Not specified, but described as 'COMPLETE' and 'SERVICE REPAIR WORKSHOP'
Manual Type:
Service Repair Workshop Manual
Manual Purpose:
To guide technicians and owners through maintenance, troubleshooting, diagnostics, and repair procedures for the specified Yamaha TTR125 models.
Language:
English (implied by typical manual distribution)
Format:
Digital (likely PDF, typical for online sales of workshop manuals)
Engine Mechanical:
Engine disassembly, assembly, inspection, repair procedures, valve clearance adjustment, piston and cylinder inspection, crankshaft and connecting rod checks, lubrication system.
Fuel System:
Carburetor disassembly, cleaning, adjustment, fuel tank and lines inspection and maintenance.
Ignition System:
CDI system, ignition timing, spark plug specifications and replacement.
Transmission Drivetrain:
Clutch operation and adjustment, transmission disassembly and assembly, gear inspection, final drive sprocket and chain maintenance.
Suspension System:
Front fork disassembly, inspection, oil replacement, rear shock absorber inspection and replacement, linkage maintenance.
Brake System:
Front and rear brake operation, caliper inspection and service, brake pad replacement, brake fluid replacement and bleeding, drum brake maintenance (if applicable to specific model variant).
Electrical System:
Wiring diagrams, battery maintenance, lighting system (headlight, taillight, turn signals), starter system (if electric start equipped), charging system (stator, rectifier/regulator).
Cooling System:
Air-cooling system (no liquid cooling components).
Exhaust System:
Exhaust pipe and muffler inspection, maintenance, and replacement.
Frame Bodywork:
Frame inspection, front fender, rear fender, seat, fuel tank removal and installation, handlebar and control lever adjustments.
Wheels Tires:
Wheel bearing inspection and service, tire replacement, spoke tension checks.
Routine Maintenance:
Oil changes, filter replacements, chain lubrication and adjustment, tire pressure checks, bolt torque checks.
Troubleshooting:
Diagnostic guides for common problems, symptom-based troubleshooting charts.
Repair Procedures:
Step-by-step instructions for component removal, disassembly, cleaning, inspection, repair, reassembly, and installation.
Diagnostic Tests:
Tests for electrical components, ignition system, and fuel system.
Depth Of Coverage:
Comprehensive, covering from basic maintenance to complete engine and component overhauls.
Diagnostic Information:
Detailed fault finding and troubleshooting sections.
Specifications Data:
Includes torque specifications, clearances, fluid capacities, and performance data.
File Format:
PDF (Portable Document Format) - common for digital manuals
Searchability:
Likely text-searchable, allowing for quick location of specific topics.
Print Quality:
High-resolution, suitable for clear printing of diagrams and text.
Binding Type:
N/A (Digital format)
Paper Type:
N/A (Digital format)
Manual Completeness:
Advertised as 'COMPLETE SERVICE REPAIR MANUAL', indicating comprehensive coverage for all aspects of maintenance and repair.
Engine Code:
4ES (TTR125), 4XL (TTR125LW)
Bore X Stroke:
54 mm x 54 mm
Compression Ratio:
9.5:1 (typical for this era/model)
Valve Train:
SOHC, 2 valves per cylinder
Horsepower:
Approximately 10-12 HP (estimated, varies slightly by tuning and source)
Torque:
Approximately 7-8 lb-ft (estimated)
Ignition System Type:
CDI (Capacitor Discharge Ignition)
Carburetor:
Mikuni VM20SS (or similar 20mm carburetor)
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
2.0 L (approx.)
Overall Length:
1830 mm (TTR125) / 1905 mm (TTR125LW)
Overall Width:
780 mm (TTR125) / 800 mm (TTR125LW)
Overall Height:
1060 mm (TTR125) / 1115 mm (TTR125LW)
Seat Height:
790 mm (TTR125) / 830 mm (TTR125LW)
Wheelbase:
1275 mm (TTR125) / 1295 mm (TTR125LW)
Ground Clearance:
265 mm (TTR125) / 295 mm (TTR125LW)
Wet Weight:
Approx. 87 kg (TTR125) / 90 kg (TTR125LW)
Dry Weight:
Approx. 81 kg (TTR125) / 84 kg (TTR125LW)
Engine Oil Change Interval:
Every 1000 km or 6 months (typical, consult manual for exact specification)
Clutch Cable Adjustment:
As needed, check for free play at levers
Chain Lubrication Adjustment:
Every 300-500 km, check tension regularly
Air Filter Cleaning:
Every 1000 km or as conditions dictate (more frequently in dusty environments)
Valve Clearance Check:
Every 4000 km or annually
Engine Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher) 4-stroke motorcycle oil
Engine Oil Capacity:
0.90 L (without oil filter change) / 1.00 L (with oil filter change) - typical, consult manual
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid
Fork Oil Type:
Yamaha Fork Oil G10 (or equivalent SAE 10W suspension oil)
Common Issues:
Carburetor jetting can sometimes be lean from the factory, requiring adjustment for optimal performance. Chain and sprocket wear is typical for an off-road machine. Fork seals can leak over time due to off-road use. Kick-start mechanism can become stiff if not lubricated properly.
Brand Heritage:
Yamaha Motor Company is a globally recognized manufacturer of motorcycles, musical instruments, and powersports vehicles, known for innovation and quality.
Model Evolution:
The TTR125 series was introduced to fill the need for an accessible, user-friendly, and capable small-displacement off-road motorcycle. It has seen various iterations, including standard and long-wheelbase (LW) versions, and later added electric start and disc brakes to more models.
Production Period:
2000 - Present (with various updates)
Manufacturing Location:
Japan (primarily)
