Target Audience:
Off-road enthusiasts, novice to experienced riders, mechanics, owners focusing on performance and reliability
Manual Value Proposition:
Provides in-depth, factory-level information crucial for maintaining and repairing the TT-R125, essential for maximizing performance and longevity in off-road conditions.
Manual Focus:
Designed specifically for the demands of off-road riding and racing, emphasizing durability and rider confidence.
Manual Type:
Service Repair Manual / Workshop Manual / Shop Manual
Format:
Digital (likely PDF, though not explicitly stated, this is typical for online sales)
Page Count Estimated:
300-500 (Typical for a comprehensive service manual of this era)
Engine:
Complete overhaul, tuning, diagnosis, internal components, lubrication system, cooling system (air-cooled)
Transmission:
Gearbox inspection, clutch service, shift mechanism, lubrication
Chassis:
Frame inspection, suspension (front forks, rear shock), steering system, swingarm
Brakes:
Front and rear brake system service, hydraulic components, bleeding procedures
Electrical:
Ignition system, lighting, charging system, wiring diagrams, component testing
Fuel System:
Carburetor (Mikuni VM series likely) overhaul, fuel tank, fuel lines
Wheels Tires:
Wheel bearing service, tire inspection, spoke tensioning
Bodywork Trim:
Panel removal and installation, seat, fenders
Routine Maintenance:
Oil changes, filter replacement, spark plug checks, chain adjustment, lubrication points
Troubleshooting:
Diagnostic procedures for common performance issues, electrical faults, starting problems
Repair Overhaul:
Detailed step-by-step instructions for engine rebuilds, transmission disassembly, suspension component replacement
Adjustments:
Carburetor jetting, ignition timing, valve clearance, clutch and brake lever adjustments
Special Tools:
Identification and usage of Yamaha-specific or recommended special tools for complex procedures
Diagnostic Capabilities:
Detailed troubleshooting charts and symptom-based diagnosis
Rebuild Specifications:
Comprehensive torque specifications, clearance measurements, and assembly procedures for all major components
Electrical Diagrams:
High-quality, detailed wiring schematics for all electrical systems
Engine Type:
Four-stroke, SOHC, 2-valve
Bore X Stroke:
54 mm x 54 mm
Cooling System:
Forced Air Cooling
Compression Ratio:
9.5:1 (Typical, consult manual for exact spec)
Horsepower:
Approx. 10-12 HP (Estimate, varies with tuning and conditions)
Torque:
N/A (Specific torque figures require manual consultation)
Carburetor Model:
Mikuni VM20 (Likely)
Fuel Type:
Unleaded gasoline
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 motorcycle oil)
Oil Capacity W Filter Change:
0.8 L (Approximate, verify with manual)
Ignition System:
CDI (Capacitor Discharge Ignition)
Transmission Type:
5-speed constant mesh
Clutch Type:
Wet, multi-plate
Gear Ratios:
Refer to manual for specific gear ratios
Transmission Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 hypoid gear oil)
Transmission Oil Capacity:
0.5 L (Approximate, verify with manual)
Safety Ratings:
N/A (Motorcycle safety ratings not standardized like cars)
Braking System:
Hydraulic disc front, drum rear
Lighting:
Headlight, tail light, brake light
Engine Oil Change Interval:
Every 1,000 km or 6 months (Consult manual for precise recommendation)
Air Filter Cleaning Interval:
Every 500 km or as needed in dusty conditions (Consult manual)
Spark Plug Check Interval:
Every 1,000 km or annually (Consult manual)
Valve Clearance Check Interval:
Every 6,000 km or 2 years (Consult manual for precise recommendation)
Engine Oil Viscosity:
SAE 10W-40
Transmission Oil Viscosity:
SAE 80
Brake Fluid Type:
DOT 3 or DOT 4
Carburetor Jetting:
Can sometimes require re-jetting depending on altitude, temperature, and modifications for optimal performance.
Suspension Tuning:
Stock suspension may be soft for aggressive riding, requiring adjustments or upgrades.
Chain And Sprocket Wear:
Regular cleaning, lubrication, and adjustment are critical to prevent premature wear.
Yamaha Motorsports Legacy:
Yamaha has a long and successful history in motorsports, particularly in off-road racing (Motocross, Enduro), building a reputation for reliability and performance.
Tt-R Series Positioning:
The TT-R series is Yamaha's line of entry-level to mid-displacement trail bikes, designed for accessibility, fun, and durability in various off-road conditions.
Tt-R125 Introduction:
The TT-R125 was introduced to cater to younger riders and smaller-statured adults looking for a capable and user-friendly trail bike.
Production Years:
The TT-R125 was produced from the early 2000s onwards, with the 2003 model being part of its initial generation.
Manufacturing Location:
Likely manufactured in Japan or Asia by Yamaha Motor Company.
