Segment:
Entry-level to intermediate off-road/trail motorcycle. Popular for recreational riding, trail exploration, and as a stepping stone to larger dirt bikes.
Competitors:
Honda CRF100F/CRF150F, Kawasaki KLX110/KLX140, Suzuki DR-Z110/DR-Z125.
Durability:
Known for its robust and reliable engine, making it a popular choice for riders who prioritize longevity and ease of maintenance.
Accessibility:
User-friendly design, with electric start available on LE models, contributing to its appeal among younger riders or those new to off-road riding.
No Expiry:
This manual offers perpetual access, ensuring support throughout the ownership of the motorcycle without subscription limitations.
Instant Download:
Immediate access to critical repair and maintenance information allows for quick problem-solving and proactive servicing.
Coverage:
Complete factory service and repair workshop manual covering all aspects of maintenance, troubleshooting, and repair for the specified Yamaha TTR125 models.
Estimated Page Count:
300-500 pages (estimated based on typical factory service manual scope for this class of vehicle)
Type:
Factory Service Manual / Workshop Manual / Repair Manual
Format:
Digital Download (PDF/Compatible format for computer, tablet, smartphone)
Engine:
Complete engine disassembly, assembly, inspection, and repair. Includes cylinder head, piston, crankshaft, camshaft, valve train, lubrication system, cooling system (if applicable, though typically air-cooled for this model).
Fuel System:
Carburetor overhaul, adjustment, and troubleshooting; fuel tank, fuel lines, petcock maintenance.
Ignition System:
CDI unit, spark plug, ignition coil, timing inspection and adjustment.
Transmission Drivetrain:
Clutch operation and adjustment, gear shifting mechanism, internal transmission components, chain and sprockets maintenance and replacement.
Chassis Suspension:
Front fork (telescopic) disassembly, inspection, fluid replacement, seal replacement; rear shock absorber inspection and replacement; swingarm and linkage maintenance.
Brakes:
Front and rear brake system maintenance, including caliper overhaul, master cylinder service, brake pad replacement, brake fluid bleeding, and cable adjustment.
Electrical System:
Wiring diagrams, lighting system, charging system (stator, rectifier/regulator), battery maintenance, starter system (if applicable), troubleshooting of electrical faults.
Wheels Tires:
Wheel bearing maintenance, spoke tension adjustment, tire selection and installation, wheel balancing.
Frame Bodywork:
Frame inspection, handlebar replacement, seat removal, fender and plastic component removal/installation.
Routine Maintenance:
Oil changes, filter replacements, chain lubrication and adjustment, spark plug inspection, air filter cleaning/replacement, brake adjustments, clutch adjustments, general inspection and lubrication.
Troubleshooting:
Step-by-step diagnostic procedures for common problems, including starting issues, engine performance problems, electrical faults, and braking concerns.
Repair Overhaul:
Detailed instructions for component disassembly, cleaning, inspection for wear or damage, repair procedures, and reassembly of all major vehicle systems.
Special Tools:
Identification of special tools required for specific maintenance and repair tasks, with descriptions or illustrations where necessary.
Torque Specifications:
Crucial torque values for all fasteners during assembly and disassembly to ensure proper component seating and prevent damage.
Depth:
Comprehensive, ranging from basic owner-level maintenance checks to full engine and transmission rebuilds. Suitable for both amateur mechanics and professional technicians.
Engine Type:
Four-stroke, SOHC, air-cooled
Displacement:
124 cc (Cubic Centimeters)
Bore X Stroke:
54 mm x 54 mm (typical for this engine family)
Compression Ratio:
Approximately 9.5:1 (typical)
Horsepower Output:
Approx. 10-12 HP (at the crankshaft, varies slightly by sub-model and tuning)
Torque Output:
Approx. 7-8 lb-ft (at the crankshaft, varies slightly)
Carburetor Type:
Mikuni VM Series (e.g., VM20) or similar Keihin carburetors
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended)
Oil Type:
Yamalube 4 (or equivalent API SG or higher, SAE 10W-40 recommended)
Oil Capacity:
Approx. 1.0-1.2 Liters (depending on filter change)
Overall Length:
Approx. 1840 mm (72.4 in)
Overall Width:
Approx. 805 mm (31.7 in)
Overall Height:
Approx. 1080 mm (42.5 in)
Seat Height:
Approx. 810 mm (31.9 in) for L model, 785 mm (30.9 in) for E/LE models
Ground Clearance:
Approx. 270 mm (10.6 in)
Wet Weight:
Approx. 93 kg (205 lbs) for electric start models, slightly less for kickstart only.
Fuel Tank Capacity:
Approx. 6.0 Liters (1.6 gal)
Engine Oil Change:
Every 1000 km (600 miles) or 6 months, whichever comes first. Refer to manual for detailed schedule based on usage (e.g., severe vs. normal).
Air Filter Cleaning:
Every 1000 km (600 miles) or more frequently in dusty conditions.
Spark Plug Inspection:
Every 3000 km (1800 miles).
Valve Clearance Check:
Every 6000 km (3600 miles).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Fork Oil Type:
Yamaha Fork Oil 10W (or equivalent suspension fluid).
Fork Oil Quantity:
Typically 255 ml per fork leg for standard models (refer to manual for exact quantity).
Carburetor Clogging:
Common on carbureted engines, especially with infrequent use or poor fuel quality. Regular cleaning and proper storage are recommended.
Chain Wear:
Routine lubrication and adjustment are critical to prevent premature chain and sprocket wear.
Fork Seal Leaks:
Front fork seals can degrade over time, leading to oil leaks. Regular inspection and potential replacement are part of maintenance.
