Category:
Youth/Entry-level Off-Road Motorcycle
Target Audience:
Beginner riders, trail riding enthusiasts, motocross training
Competitors:
Honda CRF125F, Kawasaki KLX125, Suzuki DR-Z125
Features:
Reliable air-cooled engine, robust chassis, user-friendly ergonomics, multiple seating height options (LW/LEW variants)
General Coverage:
Comprehensive service and repair for all listed 2007 Yamaha TT-R125 models
Estimated Page Count:
Likely 300-500 pages (typical for factory service manuals)
Type:
Factory Service Repair Workshop Manual
Language:
English (implied by typical factory manuals and product description)
Format:
Digital (PDF implied by 'complete an...')
Engine System:
Engine teardown, assembly, inspection, timing, lubrication, cooling, performance tuning
Fuel System:
Carburetor adjustment and overhaul, fuel tank, fuel lines, petcock
Ignition System:
CDI unit, ignition coil, spark plug, wiring diagrams
Transmission System:
Clutch operation, gearbox inspection, maintenance, and repair
Chassis System:
Frame inspection, suspension (front forks, rear shock), steering system
Braking System:
Front and rear brake system maintenance, caliper service, hydraulic lines
Electrical System:
Wiring diagrams, lighting system, battery maintenance, starter system (if applicable), switches
Exhaust System:
Exhaust pipe and muffler inspection and maintenance
Cooling System:
Air-cooled engine maintenance
Scheduled Maintenance:
Oil changes, filter replacements, spark plug checks, chain adjustment, general inspections
Troubleshooting:
Diagnostic procedures for common problems and malfunctions
Engine Repair:
Top-end rebuilds, bottom-end overhauls, component replacement
Transmission Repair:
Gearbox assembly, clutch adjustments and replacements
Suspension Service:
Fork seal replacement, shock absorber servicing, linkage maintenance
Brake Service:
Brake pad replacement, fluid bleeding, caliper servicing
Electrical Diagnostics:
Fault finding using wiring diagrams, component testing
Wheel And Tire:
Tire pressure checks, wheel bearing maintenance, spoke tensioning
Bodywork And Plastics:
Panel removal and installation, fairing repair (if applicable)
Depth:
Factory-level detail including disassembly, assembly, torque specifications, and diagnostic flowcharts
Type:
Air-cooled, 4-stroke, SOHC, 2-valve
Bore X Stroke:
54 mm x 54.5 mm
Compression Ratio:
9.5:1 (typical for this era/model)
Horsepower:
Approx. 10-11 HP (estimated, actual may vary slightly by variant)
Torque:
Approx. 7-8 lb-ft (estimated)
Carburetor Type:
Mikuni VM20 (typical for this model)
Fuel Type:
Unleaded gasoline, 87 octane minimum
Engine Oil Capacity:
0.90 L (0.95 US qt) without filter change, 0.95 L (1.00 US qt) with filter change
Length:
Approx. 1835 mm (72.2 in) for standard models, 1905 mm (75.0 in) for LW/LEW models
Width:
Approx. 760 mm (29.9 in)
Height:
Approx. 1060 mm (41.7 in) for standard models, 1140 mm (44.9 in) for LW/LEW models
Wheelbase:
Approx. 1270 mm (50.0 in) for standard models, 1335 mm (52.6 in) for LW/LEW models
Ground Clearance:
Approx. 260 mm (10.2 in) for standard models, 305 mm (12.0 in) for LW/LEW models
Dry Weight:
Approx. 85 kg (187 lbs) for standard models, 87 kg (192 lbs) for LW/LEW models
Fuel Tank Capacity:
5.5 L (1.45 US gal)
Front Suspension Travel:
170 mm (6.7 in)
Rear Suspension Travel:
180 mm (7.1 in)
Rear Tire:
3.00-14 4PR (standard), 3.00-16 4PR (LW/LEW)
Wheelbase Lw Lew:
1335 mm (52.6 in)
Seat Height Lw Lew:
Approx. 830 mm (32.7 in)
Safety Ratings:
Not applicable (off-road motorcycle, not subject to automotive safety standards)
Active Safety:
Responsive braking system, stable chassis design
Passive Safety:
Durable frame construction, protective body panels
Oil Change Interval:
Every 1,000 km (600 miles) or 6 months (typical, refer to manual for precise interval)
Spark Plug Inspection:
Every 1,000 km (600 miles)
Air Filter Cleaning:
Every 500 km (300 miles) or more frequently in dusty conditions
Chain Lubrication Adjustment:
Every 300 km (200 miles) or after washing/riding in rain
Engine Oil Spec:
Yamalube 4 (or equivalent) SAE 10W-40 API SE, SF type or API SG classification (or higher)
Common Wear Items:
Clutch wear, chain and sprockets wear, brake pad wear, suspension seals
Carburetor Tuning:
May require periodic cleaning and adjustment for optimal performance, especially after prolonged storage or varying altitudes.
Suspension Seals:
Fork seals can be prone to leaks, particularly with aggressive riding or dirt ingress.
Chain Tension:
Proper chain tension is critical to prevent premature wear of the drive components and drivetrain.
Brand Focus:
Yamaha has a long history of producing reliable and performance-oriented motorcycles, particularly in the off-road segment.
Tt-R Series:
The TT-R line has been a staple for youth and entry-level off-road riding, evolving with improvements in engine technology, suspension, and ergonomics.
Manufacturing Origin:
Japan (typical for Yamaha)
Production Years:
The TT-R125 platform has been in production for many years, with the 2007 model representing a mature iteration.
