Positioning:
Entry-level to intermediate off-road/trail motorcycle, popular for youth and recreational riders
Competitors:
Honda CRF125F, Kawasaki KLX125, Suzuki DR-Z125
Features:
Reliable 4-stroke engine, ease of use, durability, electric start (E and LWE models), disc front brake (LWE model)
Engine:
Complete overhaul, diagnostics, tuning, lubrication, cooling system
Transmission:
Gearbox disassembly, inspection, repair, clutch system
Fuel System:
Carburetor service, fuel lines, fuel tank maintenance
Electrical System:
Ignition system, lighting, charging system, wiring diagrams, battery service
Chassis:
Frame, suspension (front fork, rear shock), steering system
Brakes:
Front disc brake, rear drum brake service, hydraulic components
Wheels And Tires:
Wheel bearing service, tire replacement, spoke tensioning
Bodywork:
Plastic body panels, seat, fenders, handlebars
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustment, spark plug service
Troubleshooting:
Diagnostic charts, common problems and solutions
Repair:
Step-by-step disassembly and reassembly instructions for all major components
Technical Data:
Torque specifications, clearances, timing settings, electrical resistance values
Depth:
Comprehensive, covering from basic maintenance to full engine rebuilds and component overhauls
Engine Type:
124 cc, single-cylinder, forward-inclined, 4-stroke, air-cooled, SOHC
Bore X Stroke:
54 mm x 54.5 mm (typical)
Compression Ratio:
9.5:1 (typical)
Valvetrain:
SOHC, 2 valves
Horsepower:
Approx. 10-12 HP (varies by model year and tuning)
Torque:
Approx. 7-8 lb-ft (varies by model year and tuning)
Carburetor:
Mikuni VM20 (typical for most variants)
Fuel Type:
Unleaded gasoline (minimum 87 octane)
Oil Capacity:
0.8 L (approx.) - Requires periodic checks and top-ups
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 motorcycle oil)
Length:
Approx. 1730 mm (68.1 in)
Width:
Approx. 795 mm (31.3 in)
Height:
Approx. 1065 mm (41.9 in)
Wheelbase:
Approx. 1200 mm (47.2 in)
Ground Clearance:
Approx. 295 mm (11.6 in)
Wet Weight:
Approx. 93 kg (205 lbs) for TT-R125LWE
Seat Height:
Approx. 805 mm (31.7 in) for TT-R125LWE
Safety Ratings:
N/A (Off-road motorcycle, not subject to typical automotive crash ratings)
Braking System:
Front: Disc brake (LWE model), Rear: Drum brake
Suspension Front:
Telescopic fork, 31 mm (6.6 in) travel
Suspension Rear:
Swingarm, Monocross suspension (7.5 in travel for LWE)
Lighting:
Halogen headlight, taillight, brake light
Oil Change Interval:
Every 3,000 km (1,860 miles) or 6 months (refer to manual for specific oil type)
Air Filter Cleaning:
Every 1,000 km (620 miles) or more frequently in dusty conditions
Spark Plug Check:
Every 3,000 km (1,860 miles)
Valve Clearance Check:
Every 6,000 km (3,720 miles) or 12 months
Engine Oil Specification:
SAE 10W-40 API SG or higher (Yamalube 4 recommended)
Brake Fluid Specification:
DOT 3 or DOT 4
Common Issues:
Carburetor jetting sensitivity to altitude/temperature, chain wear, general maintenance needs for off-road use (e.g., air filter cleaning)
Maintenance Focus:
Regular cleaning, lubrication of chain and pivots, air filter maintenance are crucial for longevity.
Brand History:
Yamaha Motor Company, a leading Japanese manufacturer known for innovation and quality in motorcycles, marine products, and other motorized vehicles.
Model Lineage:
The TTR series is Yamaha's line of trail bikes, known for their reliability and ease of use. The 125cc models have been a staple for younger riders transitioning into off-road riding.
Production Years:
First introduced in the early 2000s, with continuous updates and model variations (E, LWE) through the 2000s and into the 2010s.
