Segment:
Entry-level to intermediate off-road motorcycle, trail bike, youth dirt bike.
Target Audience:
Beginners, younger riders, trail riders seeking a reliable and easy-to-maintain machine.
Key Competitors:
Honda CRF100F/125F, Kawasaki KLX110/140, Suzuki DR-Z125.
Variant Differences:
E (Electric Start), L (Longer seat, higher handlebars, longer suspension travel), LE (Electric Start + L features).
Ease Of Use:
Known for its user-friendly nature, forgiving power delivery, and manageable size.
Engine:
Complete overhaul, diagnosis, tune-up, internal components, cooling system (air-cooled), lubrication system.
Transmission:
Gearbox operation, clutch, shifting mechanisms, internal components, maintenance, troubleshooting.
Fuel System:
Carburetor (Mikuni VM20SS), fuel tank, fuel lines, fuel filter, fuel pump (if applicable), mixture adjustments, cleaning.
Ignition System:
CDI system, spark plug, coil, timing, troubleshooting.
Electrical System:
Wiring diagrams, battery, charging system (alternator), lighting system, switches, fuses, troubleshooting.
Suspension:
Front fork (telescopic), rear shock absorber, adjustments, maintenance, overhaul, specifications.
Brakes:
Front drum brake, rear drum brake (or disc for LE), brake pad replacement, fluid specifications, bleeding, adjustment, troubleshooting.
Chassis And Frame:
Frame inspection, steering system, wheel bearings, swingarm, maintenance, lubrication.
Bodywork And Trim:
Fender removal/installation, seat, fuel tank cover, plastic components, graphics.
Maintenance:
Oil changes, filter replacement, chain adjustment, spark plug cleaning/replacement, air filter cleaning/replacement, brake adjustments, lubrication points.
Troubleshooting:
Diagnostic flowcharts for common issues (starting problems, poor performance, electrical faults, etc.).
Repair:
Engine rebuild, carburetor overhaul, suspension repair, brake system repair, electrical component replacement.
Inspection:
Pre-ride checks, periodic inspections of critical components.
Depth:
Comprehensive, covering everything from routine maintenance to full engine and component overhauls, suitable for dealership-level technicians and advanced DIY enthusiasts.
Digital Quality:
High-resolution scans, fully searchable text, bookmarked chapters for easy navigation.
Print Readability:
Clear text and diagrams optimized for printing.
Physical Binding:
Not applicable (digital format), but if printed, typically spiral-bound for lay-flat usability in a workshop.
Physical Paper:
Not applicable (digital format), but OEM manuals are typically printed on durable, semi-gloss paper.
Type:
4-stroke, SOHC, 2-valve, Air-cooled
Displacement:
124cc (123.7cc)
Bore X Stroke:
54.0 mm x 54.5 mm
Carburetor Model:
Mikuni VM20SS
Horsepower:
Approximately 10-12 HP (estimated, varies by tune and specific model)
Torque:
Not officially published, but estimated around 7-8 lb-ft
Fuel Type:
Unleaded gasoline, minimum 87 octane
Fuel Tank Capacity:
1.6 gallons (6.0 Liters)
Length:
Approximately 71.9 inches (1825 mm) for standard models, longer for L/LE
Width:
Approximately 31.1 inches (790 mm)
Height:
Approximately 41.7 inches (1060 mm) for standard models, taller for L/LE
Wheelbase:
Approximately 48.2 inches (1225 mm)
Ground Clearance:
Approximately 9.1 inches (230 mm) for standard models, higher for L/LE
Dry Weight:
Approximately 205 lbs (93 kg)
Wet Weight:
Not officially published, estimated around 220 lbs (100 kg)
Max Load Capacity:
Not officially published, but designed for riders up to approximately 150 lbs.
Crash Test Results:
Not applicable (motorcycle).
Braking System:
Front drum, Rear drum (or disc for LE) - detailed specs in manual.
Lighting:
Headlight, taillight, stoplight - wiring and bulb specifications in manual.
Frame Construction:
Steel semi-double cradle frame designed for off-road durability.
Handguards:
Standard on most models to protect hands from roost and debris.
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first.
Oil Filter Replacement:
At every engine oil change.
Air Filter Cleaning:
Every 20 hours of operation or monthly; replace if damaged.
Spark Plug Inspection:
Every 1,000 km (600 miles) or 6 months.
Chain Lubrication And Adjustment:
Every 500 km (300 miles) or as needed, especially after riding in wet conditions.
Engine Oil Capacity:
0.90 Liters (0.95 US qt) without filter change, 1.00 Liters (1.05 US qt) with filter change.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Carburetor Cleaning:
Can become clogged with debris or varnish if fuel sits for extended periods, requiring regular cleaning and fuel stabilizer use.
Chain And Sprockets:
Wear can accelerate in dusty or muddy conditions, requiring frequent cleaning and lubrication.
Electrical Connections:
Corrosion on connectors in off-road environments can lead to intermittent electrical issues; inspection and cleaning are recommended.
Manufacturer:
Yamaha Motor Company, a Japanese manufacturer with a long history in motorcycle and powersports production.
Predecessors:
TT-R125 series evolved from Yamaha's long line of off-road motorcycles, building on lessons learned from smaller displacement bikes.
Generations:
The TT-R125 platform has seen minor updates, but the core design has remained consistent for many years.
Manufacturing Location:
Primarily Japan.
Production Years:
The TT-R125 platform has been in production for many years, with the 2007 model being a common and well-supported variant.
