Motorcycle Class:
Entry-level to intermediate dirt bike / off-road motorcycle.
Target Audience:
Beginner riders, recreational off-road enthusiasts, youth riders graduating to a larger displacement, general maintenance DIYers.
Key Competitors:
Honda CRF100/125F, Kawasaki KLX110/125, Suzuki DR-Z110/125.
Competitive Advantages:
Reliable air-cooled engine, user-friendly power delivery, durable chassis, extensive aftermarket support, simple maintenance.
Vehicle Design Philosophy:
Robust, easy-to-ride, low-maintenance off-road machine.
Manual Value Proposition:
Empowers owners to perform routine maintenance and repairs, saving time and money, and ensuring the longevity of their Yamaha TTR125.
Engine Coverage:
Complete engine overhaul, tune-up, carburetor, ignition system, cooling system (air-cooled), lubrication system.
Transmission Coverage:
Clutch operation, gear shifting mechanism, internal transmission components, lubrication.
Chassis Coverage:
Frame, suspension (front forks, rear shock), steering, wheels, tires, braking system (front and rear).
Electrical Coverage:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting (headlight, taillight, indicators), ignition system components.
Bodywork Coverage:
Body panels, fenders, seat, fuel tank, graphics, general inspection and cleaning.
Estimated Page Count:
200-300 pages (estimated based on typical service manual content for this class of motorcycle)
Manual Type:
Service and Repair Manual
Engine Systems:
Combustion chamber, piston, rings, cylinder, crankshaft, connecting rod, camshaft, valve train, carburetor, exhaust.
Fuel System:
Carburetor model specific tuning, jetting, float level adjustment, fuel filter replacement.
Ignition System:
CDI unit, ignition coil, spark plug specifications and replacement, timing procedures (if applicable).
Cooling System:
Air-cooled engine management and inspection.
Lubrication System:
Oil type, capacity, change intervals, oil filter replacement.
Transmission Systems:
Clutch assembly, primary drive, gearbox components, shifting linkage.
Braking Systems:
Front drum brake, rear drum brake, brake shoe inspection and replacement, brake lever and pedal adjustment.
Suspension Systems:
Front telescopic forks (oil type, level, seal replacement), rear monoshock (adjustment, spring pre-load).
Steering Systems:
Handlebar, steering stem bearings, lubrication, adjustments.
Wheel And Tire Systems:
Wheel bearing inspection and lubrication, spoke tension, tire pressure, tire replacement.
Electrical Systems:
Lighting circuits, charging system, battery maintenance, fuses, switches.
Maintenance Procedures:
Oil changes, filter replacements, spark plug checks/replacement, chain adjustment and lubrication, air filter cleaning/replacement, brake adjustments, tire pressure checks, valve clearance checks.
Repair Procedures:
Engine top-end rebuild (piston, cylinder, head), clutch replacement, carburetor overhaul, fork seal replacement, shock absorber replacement, brake shoe replacement, wheel bearing replacement, electrical component troubleshooting and replacement.
Troubleshooting Guides:
Diagnosing common starting issues, engine performance problems, electrical faults, braking system concerns, suspension behavior.
Diagnostic Procedures:
Checking compression, ignition timing verification (if applicable), carburetor circuit testing.
Assembly Disassembly:
Step-by-step instructions for major component removal and installation (engine, transmission, suspension, wheels).
Diagnostic Capabilities:
Advanced diagnostics for engine performance and electrical systems.
Rebuild Scope:
Complete engine and transmission rebuilds.
Electrical Detail Level:
Detailed wiring diagrams and component testing procedures.
Forensics Detail:
Inspection guidelines for wear and damage on critical components.
Engine Oil Change:
Every 1,000 miles (1600 km) or 6 months, whichever comes first. (Refer to manual for exact OEM specification.)
Spark Plug Check:
Every 600 miles (1000 km) or annual inspection. Replacement as needed.
Air Filter Cleaning:
Every 300 miles (500 km) or as needed in dusty conditions.
Chain Lubrication:
Every 300 miles (500 km) and after washing or riding in wet conditions.
Valve Clearance Check:
Every 3,000 miles (5000 km) or 2 years. (Critical for performance and engine longevity.)
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF, or SG or motorcycle-specific 10W-40.
Engine Oil Capacity:
0.95 L (1.0 US qt)
Fork Oil Type:
Yamaha Fork Oil 10W or equivalent.
Fork Oil Quantity:
176 cc per fork leg (refer to manual for exact specification and level check procedure).
Common Wear Items:
Brake shoes, clutch plates, chain and sprockets, tires, spark plugs, air filter.
Potential Issues:
Carburetor jetting can require adjustment for altitude/temperature changes. Fork seals can leak over time. Chain and sprocket wear requires regular attention.
Brand Focus:
Yamaha's long-standing reputation for producing reliable and performance-oriented motorcycles across various disciplines.
Ttr Series Introduction:
The TTR series has been a cornerstone of Yamaha's off-road lineup for decades, evolving from smaller displacement models to offer a range of options for different rider levels.
Ttr125 Introduction Year:
The TTR125 model line was introduced in the late 1990s/early 2000s, replacing or augmenting previous models like the TT-R125.
Ttr125 Variants:
Available in both standard (kick-start) and LE (electric-start, larger wheels) versions, with minor variations in suspension and brakes over the years.
Manufacturing Location:
Typically manufactured in Japan or other Yamaha global facilities.
Model Production Years:
The TTR125 has been in continuous production for many years, with the 2005 model representing a specific iteration of its development.
