Target Audience:
Owners, DIY enthusiasts, and professional mechanics working on the 2001 Yamaha TT-R125 and TT-R125LW models.
Manual Advantage:
Provides in-depth, manufacturer-specific information essential for accurate and efficient maintenance and repair, surpassing generic online guides.
Features:
Detailed diagrams, step-by-step instructions, troubleshooting tips, and specifications for all major vehicle systems.
Engine System:
Full overhaul, top-end, bottom-end, lubrication, cooling, ignition, fuel delivery, exhaust
Transmission System:
Clutch operation, gear shifting mechanism, internal components, lubrication
Chassis System:
Frame, suspension (front fork, rear shock), steering, wheels, tires, brakes (front and rear)
Electrical System:
Wiring diagrams, lighting, ignition system, battery, charging system, CDI unit
Bodywork And Frame:
Body panel removal and installation, seating, fuel tank, fenders, frame inspection
Maintenance Procedures:
Oil changes, filter replacements, chain adjustment, spark plug service, air filter cleaning/replacement, valve clearance checks, brake bleeding
Repair Procedures:
Engine rebuilds, carburetor overhaul, suspension fork seal replacement, brake pad replacement, wheel bearing service, electrical component diagnosis and replacement
Troubleshooting Guides:
Diagnostic charts for common running issues, electrical faults, and performance problems
Technical Specifications:
Detailed torque values, clearances, fluid capacities, and specifications for all components
Depth Of Coverage:
Comprehensive: From routine maintenance to complete engine and component rebuilds, suitable for both novice and experienced technicians.
Engine Type:
4-stroke, SOHC, Air-cooled
Displacement:
124 cc (7.57 cubic inches)
Bore X Stroke:
54 mm x 54 mm (2.13 in x 2.13 in)
Valve Clearance Intake:
0.08 - 0.12 mm (0.003 - 0.005 in) (Cold)
Valve Clearance Exhaust:
0.12 - 0.17 mm (0.005 - 0.007 in) (Cold)
Horsepower Estimated:
Approx. 10-12 HP (Varied by source and tuning)
Carburetor Type:
Mikuni VM20SS
Fuel Type:
Unleaded gasoline (min. 87 octane recommended)
Fuel Tank Capacity:
1.6 Gallons (6.0 Liters)
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher motorcycle oil)
Oil Capacity:
0.90 Liters (0.95 US qt) without filter change; 0.95 Liters (1.00 US qt) with filter change
Ignition Type:
CDI (Capacitor Discharge Ignition)
Spark Plug Type:
NGK CR9E (or equivalent)
Spark Plug Gap:
0.7 - 0.8 mm (0.028 - 0.031 in)
Overall Length:
74.0 in (1880 mm)
Overall Width:
31.1 in (790 mm)
Overall Height:
44.3 in (1125 mm)
Seat Height:
32.1 in (815 mm)
Wheelbase:
50.2 in (1275 mm)
Dry Weight:
174 lbs (79 kg)
Wet Weight Estimated:
190 lbs (86 kg)
Maximum Load:
Not specified, but typically intended for single rider.
Front Suspension Type:
Telescopic fork
Front Suspension Travel:
6.5 in (165 mm)
Rear Suspension Type:
Swingarm (Monocross suspension)
Rear Suspension Travel:
5.8 in (147 mm)
Front Brake Type:
Drum brake
Rear Brake Type:
Drum brake
Front Tire Size:
2.50-19 4PR
Rear Tire Size:
3.00-16 4PR
Wheelbase Lw Variant:
52.0 in (1320 mm) (for TT-R125LW)
Seat Height Lw Variant:
33.7 in (855 mm) (for TT-R125LW)
Safety Ratings:
N/A (Off-road motorcycle, not subject to road-vehicle safety ratings like NHTSA or Euro NCAP)
Braking System:
Dual drum brakes providing adequate stopping power for intended use.
Frame Construction:
Steel semi-double cradle frame designed for durability and off-road handling.
Lighting:
Headlight and taillight for visibility during operation.
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first. (Consult manual for exact interval based on usage).
Oil Filter Replacement:
Replace with engine oil change (refer to manual for specific part number).
Air Filter Cleaning:
Every 500 km (300 miles) or as needed based on dusty conditions. Clean and re-oil.
Spark Plug Inspection:
Every 1,000 km (600 miles).
Chain Lubrication Adjustment:
Every 300 km (200 miles) or after washing/heavy use. Check for 10-20 mm (0.4-0.8 in) of slack.
Valve Clearance Check:
Every 4,000 km (2,500 miles).
Engine Oil Specification:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher)
Transmission Oil Specification:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4)
Brake Fluid Type:
DOT 3 or DOT 4 (if hydraulic brakes were equipped, but this model has drum brakes. Manual would cover inspection/replacement of brake shoes).
Common Wear Items:
Brake shoes, chain and sprockets, tires, clutch plates (with heavy use), spark plug.
Carburetor Tuning:
May require periodic cleaning and adjustment for optimal performance, especially after sitting idle.
Suspension Seals:
Front fork seals can wear over time, leading to oil leaks. Manual details replacement procedures.
Electrical Connections:
Corrosion or loose connections can occur on off-road vehicles; manual provides wiring diagrams for diagnostics.
Brand Focus:
Yamaha is renowned for its extensive history in motorsports, including motocross and off-road racing, with a strong reputation for performance and reliability.
Tt R Series Context:
The TT-R series represents Yamaha's line of recreational off-road motorcycles, designed for trail riding and beginner to intermediate riders. The 125cc displacement makes it an accessible entry point.
Production Period:
The TT-R125 and its variants (like the LW) were produced for many years, with the 2001 model being an early iteration of this popular platform.
Manufacturing Location:
Typically manufactured in Japan or Southeast Asia by Yamaha Motor Company.
