Model Variant:
TTR125 (Standard), TTR125E (Electric Start), TTR125L (Long Wheelbase), TTR125LE (Long Wheelbase Electric Start)
Common Model Designations:
TTR 125, TTR-125, TTR125
Generation:
First Generation (pre-2014 models)
Vin Code Digit:
9th digit typically indicates model year (e.g., 1=2001, 2=2002, ..., A=2010, B=2011, C=2012, D=2013)
Category:
Entry-level to intermediate off-road (trail/play bike)
Target Audience:
Beginner riders, youth riders, recreational trail riders
Key Competitors:
Honda CRF100F/CRF125F, Kawasaki KLX110/KLX125, Suzuki DR-Z125
Durability:
Known for its robust construction and reliability, making it a popular choice for learning and general trail riding.
Simplicity:
Air-cooled engine and straightforward design contribute to ease of maintenance.
Versatility:
Suitable for various off-road terrains and rider skill levels.
Electric Start Option:
Availability of electric start (TTR125E/LE) enhances usability for beginners.
Covered Years:
2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
Covered Models:
TTR125, TTR125E, TTR125L, TTR125LE
Estimated Pages:
400-600 (typical for comprehensive repair manuals)
Type:
Complete Repair Manual / Service Manual
Engine Mechanical:
Complete engine overhaul, cylinder head, piston, crankshaft, connecting rod, valve timing, lubrication system
Fuel System:
Carburetor (Mikuni VM26), fuel tank, fuel lines, petcock, fuel filter
Ignition System:
CDI ignition system, spark plug, ignition coil, stator, flywheel
Exhaust System:
Exhaust pipe, muffler, heat shields
Transmission Drivetrain:
Clutch operation, gear shift mechanism, primary drive, final drive (chain and sprockets)
Cooling System:
Air-cooled engine (no liquid cooling system)
Suspension:
Front telescopic forks (with adjustment options on some models), rear monoshock suspension, linkage components
Brakes:
Front disc brake system (caliper, master cylinder, brake lines, pads), rear drum brake system (brake shoes, drum, linkage)
Wheels Tires:
Wheel bearing maintenance, spoke tension, tire pressure, tire replacement
Electrical System:
Wiring diagrams, battery maintenance (if applicable), lighting system (headlight, taillight, brake light), kill switch, starter system (for E models)
Chassis Frame:
Frame inspection, steering system, triple clamps, footpegs, handlebars
Bodywork:
Plastic body panels (fenders, shrouds), seat assembly, fuel tank cover
Routine Maintenance:
Oil changes, air filter cleaning/replacement, spark plug inspection/replacement, chain adjustment and lubrication, brake adjustment, clutch adjustment, valve clearance check
Troubleshooting:
Diagnostic charts for common problems (starting issues, performance issues, electrical faults)
Engine Repair:
Top-end rebuild (piston, rings), bottom-end rebuild (crankshaft, bearings), valve adjustments, carburetor tuning and rebuilding
Transmission Repair:
Clutch assembly service, gear shifting mechanism inspection and repair
Suspension Service:
Fork seal replacement, fork oil change, rear shock absorber inspection, linkage bearing service
Brake Service:
Brake pad replacement, brake caliper service, master cylinder rebuild, drum brake adjustment and service
Electrical Diagnostics:
Wiring harness inspection, troubleshooting electrical faults using wiring diagrams, starter motor testing (E models)
Chassis Service:
Steering bearing service, wheel bearing replacement
Depth:
Comprehensive (from basic maintenance to full engine and chassis rebuilds)
Detail Level:
Detailed step-by-step instructions with diagrams and torque specifications
Diagnostic Support:
Includes troubleshooting guides for common issues
Engine Type:
Four-stroke, SOHC, Air-cooled
Bore X Stroke:
54.0 mm x 54.5 mm
Compression Ratio:
9.5:1 (typical, may vary slightly by year)
Carburetor:
Mikuni VM26, single
Ignition:
CDI (Capacitor Discharge Ignition)
Starting System:
Kick start (standard), Electric start (E/LE models)
Horsepower Estimated:
~10-11 HP (at flywheel, estimated)
Torque Estimated:
~7-8 lb-ft (at flywheel, estimated)
Fuel Tank Capacity:
Approx. 1.6 US gallons (6.0 L)
Recommended Fuel:
Unleaded gasoline (Octane rating typically 87 or higher)
Overall Length:
Approx. 74.2 in (1885 mm) for standard, 77.6 in (1970 mm) for L/LE
Overall Width:
Approx. 31.7 in (805 mm)
Overall Height:
Approx. 43.3 in (1100 mm)
Seat Height:
Approx. 31.5 in (800 mm) for standard, 32.7 in (830 mm) for L/LE
Ground Clearance:
Approx. 11.2 in (285 mm)
Wheelbase:
Approx. 49.4 in (1255 mm) for standard, 50.8 in (1290 mm) for L/LE
Dry Weight:
Approx. 187 lbs (85 kg) for standard, 192 lbs (87 kg) for E/LE
Wet Weight:
Not officially published, but significantly higher than dry weight.
Cargo Capacity:
N/A (Motorcycle)
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first (refer to manual for exact interval).
Oil Filter Replacement:
Typically replaced at every oil change or as per manual recommendation.
Air Filter Cleaning:
Clean every 500 km (300 miles) or more frequently in dusty conditions.
Spark Plug Inspection:
Inspect every 1,000 km (600 miles), replace as needed.
Valve Clearance Check:
Check every 6,000 km (3,700 miles) or 3 years.
Chain Lubrication:
Lubricate chain every 500 km (300 miles) or after riding in wet conditions.
Chain Tension Adjustment:
Adjust chain slack every 1,000 km (600 miles).
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF, SG, SH, SJ or higher, SE, SF, SG or SH, SJ, SL, SM, SN classification.
Engine Oil Capacity:
1.00 L (1.06 US qt) without filter change, 1.10 L (1.16 US qt) with filter change.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Carburetor Tuning:
Mikuni VM26 can sometimes require precise tuning for optimal performance across different elevations and conditions.
Clutch Slippage:
Can occur with heavy use or if clutch plates are worn. Regular adjustment and proper oil are key.
Suspension Wear:
Like many off-road bikes, suspension components (seals, bushings) may require periodic service and replacement.
Chain And Sprocket Wear:
Regular maintenance is crucial to prevent premature wear of the drive chain and sprockets.
Manufacturer:
Yamaha Motor Corporation, Japan
Yamaha Offroad Legacy:
Yamaha has a long and successful history in off-road motorsports, known for innovation and durability.
Introduction Year:
The TTR125 series was introduced in 2000 for the 2001 model year.
Design Philosophy:
Designed as a successor to the popular TT-R125, focusing on user-friendliness, reliability, and accessibility for a broad range of riders.
Key Updates Pre 2014:
Minor updates likely occurred during this period, but the core design remained consistent. Electric start was a significant addition.
Production Period Covered:
2001-2013 (as per manual)
Manufacturing Location:
Likely manufactured in Japan or Yamaha's global production facilities.
