Market Segment:
Lightweight off-road recreational motorcycle, entry-level motocross/trail bike.
Target Audience:
Beginner to intermediate riders, youth riders, casual trail riders.
Competitors:
Honda CRF100F/XR100, Kawasaki KLX110/125, Suzuki DR-Z110/125.
Engine Configuration:
Compact, air-cooled, four-stroke engine.
Suspension:
Long-travel suspension for off-road capability, particularly with LW and LWE variants featuring larger wheels and revised suspension.
Reliability:
Yamaha's reputation for durable and reliable four-stroke engines.
Ease Of Use:
Designed for manageable power delivery and ease of operation for newer riders.
Engine:
Complete overhaul, disassembly, assembly, inspection, tuning, lubrication.
Fuel System:
Carburetor disassembly, cleaning, adjustment, troubleshooting; fuel tank, petcock, fuel lines.
Ignition System:
CDI unit, spark plug, ignition timing, troubleshooting.
Transmission:
Clutch operation, gear shifting mechanism, inspection, adjustment, lubrication.
Chassis:
Frame inspection, front fork assembly (including seals and oil), rear shock absorber, swingarm, bearings.
Braking System:
Front and rear brake mechanisms, hydraulic lines, brake pads, levers, adjustment.
Electrical System:
Wiring diagrams, lighting system (headlight, taillight, brake light), battery, charging system (stator, regulator/rectifier), horn, switches.
Wheels And Tires:
Tire inspection and replacement, wheel balancing, spoke tensioning, rim maintenance.
Exhaust System:
Muffler and pipe inspection, gasket replacement, sealing.
Cooling System:
Air-cooled engine, emphasis on heat dissipation and fin cleaning.
Bodywork:
Fairings, fenders, seat, fuel tank, handlebar, grips, controls, decals.
Maintenance:
Routine checks, lubrication points, filter replacement, spark plug changes, valve clearance adjustments.
Troubleshooting:
Diagnostic flowcharts for common starting issues, performance problems, electrical faults.
Repair:
Step-by-step instructions for component removal, installation, and rebuilding of major assemblies.
Diagnostics:
Procedures for identifying and rectifying malfunctions in all vehicle systems.
Specifications:
Torque values, clearances, fluid capacities, electrical resistance values.
Special Tools:
Identification of required Yamaha specialty tools for specific procedures.
Depth:
Comprehensive coverage from basic rider maintenance to complete engine rebuilds and electrical system diagnostics.
Audience:
Suitable for professional technicians, experienced DIY mechanics, and serious enthusiasts.
Oil Change:
Every 1000 km (600 miles) or annually. Manual specifies exact intervals and checks.
Air Filter Cleaning:
Every 500 km (300 miles) or as needed based on riding conditions. Crucial for engine longevity.
Valve Clearance Check:
Every 5000 km (3000 miles). Precise measurements and adjustments are detailed.
Spark Plug Replacement:
As needed, but recommended at intervals outlined in the manual (e.g., 3000-5000 km).
Engine Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher, JASO MA certified) motorcycle oil.
Engine Oil Capacity:
1.00 L (1.06 US qt) without filter change; 1.10 L (1.16 US qt) with filter change. Consult manual for exact capacity.
Fork Oil Type:
Yamaha Fork Oil G10 (or equivalent SAE 10W fork oil). Specific capacity per leg detailed.
Carburetor Cleaning:
Tendency for carburetors to get clogged if fuel sits for extended periods; regular cleaning and fuel stabilizer recommended.
Clutch Wear:
Clutch plates can wear with aggressive riding, requiring adjustment or replacement. Manual details adjustment procedures.
Suspension Seals:
Fork seal leaks are common in off-road use; manual provides fork seal replacement instructions.
Chain And Sprockets:
Regular lubrication and adjustment are critical for drivetrain longevity. Manual covers chain slack and sprocket wear checks.
Heritage:
Yamaha's long history of producing reliable and performance-oriented off-road motorcycles, building on the legacy of the YZ and TT-R lines.
Evolution:
The TT-R125 was introduced as a successor and improvement over smaller displacement Yamaha trail bikes, offering more power and better suspension. The LW and LWE models introduced larger wheels and longer travel suspension for enhanced off-road capability and adjustability.
Production Years:
First generation models span from 2000 to present (with various updates).
Manufacturing Location:
Primarily manufactured in Japan.
