Product Name:
Yamaha Trailway 125 1999-2004 Workshop Service Repair Manual PDF Download
Covered Years:
1999, 2000, 2001, 2002, 2003, 2004
Vehicle Class:
Lightweight, utilitarian scooter/motorcycle designed for urban commuting and light trail use.
Competitors:
Similar displacement scooters and small motorcycles from Honda, Suzuki, and Kymco of the same era.
Design Philosophy:
Focus on reliability, ease of maintenance, and practicality for everyday transportation.
Target Audience:
Commuters, novice riders, and those seeking an economical and low-maintenance mode of transport.
Coverage Summary:
Comprehensive workshop service and repair procedures for the Yamaha Trailway 125 motorcycle, covering all aspects from basic maintenance to in-depth diagnostics and repair.
Estimated Page Count:
Hundreds of pages (specific count not provided, typical for factory manuals)
Manual Type:
Workshop Service Repair Manual
Language:
English (presumed, as is standard for factory manuals of this era and product type)
Engine:
Engine overhaul, top-end, bottom-end, valve clearance adjustment, ignition system, carburetor tuning, cooling system (air-cooled), lubrication.
Transmission:
Clutch operation, gear shifting mechanism, transmission disassembly and reassembly, lubrication.
Chassis:
Frame inspection and repair, front suspension (forks), rear suspension (shock absorber, swingarm), steering system.
Brakes:
Front and rear brake systems (likely drum brakes given the model and era), brake lever, brake cable adjustment, brake pad/shoe replacement.
Electrical:
Wiring diagrams, lighting system, ignition coil, battery, charging system (stator, regulator/rectifier), starter system (if applicable), fuses.
Fuel System:
Fuel tank, fuel lines, fuel filter, carburetor service and adjustment (likely Mikuni VM series), throttle control.
Exhaust System:
Exhaust pipe and muffler inspection, gasket replacement.
Bodywork And Trim:
Seat removal, fender inspection, panel removal and installation.
Maintenance:
Routine inspections, oil changes, filter replacements, spark plug replacement, chain adjustment, lubrication points.
Troubleshooting:
Diagnostic charts for common running issues, electrical faults, and mechanical problems.
Repair:
Step-by-step disassembly and reassembly instructions for all major components, including engine rebuilds, suspension overhauls, and electrical system repairs.
Specifications:
Torque values for fasteners, clearances, fluid capacities, electrical component resistance values.
Depth Of Information:
Factory-level detail suitable for professional mechanics and experienced DIY enthusiasts, including complete engine teardown and rebuild procedures.
Engine Type:
Four-stroke, air-cooled, SOHC (Single Overhead Camshaft), 2-valve
Displacement:
125cc (approximately 124cc)
Bore X Stroke:
Specific dimensions to be found in the manual (e.g., 52.0 mm x 57.9 mm - typical for similar Yamaha engines of the era).
Horsepower:
Estimated 8-10 HP at ~7000-7500 RPM (typical for this class).
Torque:
Estimated 7-9 Nm at ~5000-6000 RPM.
Fuel Delivery:
Carburetor (likely Mikuni VM17 or similar)
Fuel Type:
Unleaded Gasoline (Octane rating as specified in manual, typically 87 or higher)
Ignition Type:
CDI (Capacitor Discharge Ignition)
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 motorcycle specific 4-stroke engine oil).
Oil Capacity:
Approx. 1.0 - 1.2 Liters (refer to manual for exact capacity with filter change).
Transmission Type:
Automatic (likely CVT - Continuously Variable Transmission) or Automatic Clutch with manual shifting.
Gear Ratios:
Variable ratios via CVT (if equipped) or fixed gear ratios (if manual clutch).
Drive Type:
Belt drive or Chain drive (depending on specific model variant, likely chain drive for this type of vehicle).
Transmission Oil Type:
Refer to manual; may be engine oil for wet clutch applications, or specific gear oil for non-integrated transmissions.
Length:
Specific dimensions to be found in manual (typically around 1800-2000 mm).
Width:
Specific dimensions to be found in manual (typically around 700-800 mm).
Height:
Specific dimensions to be found in manual (typically around 1000-1100 mm).
Curb Weight:
Estimated 100-120 kg (dry weight, add fluids for curb weight).
Fuel Capacity:
Approx. 5-7 Liters.
Safety Standards:
Meets all applicable federal safety standards for motorcycles of its time.
Braking System:
Front and rear drum brakes.
Lighting:
Headlight, taillight, brake light, turn signals.
Tires:
Tubed tires; specific sizes to be found in manual (e.g., 80/90-17 front, 90/90-17 rear).
Oil Change Interval:
Every 3,000 km or 6 months, whichever comes first (typical for Yamaha engines of this era).
Air Filter Cleaning:
Inspect and clean every 3,000 km; replace as needed.
Spark Plug Replacement:
Replace every 6,000 km or annually.
Valve Clearance Check:
Check every 12,000 km or 2 years.
Chain Adjustment:
Check and adjust chain slack every 1,000 km.
Brake Fluid Type:
DOT 3 or DOT 4 (if hydraulic brakes are present; likely cable-actuated drum brakes).
Coolant Type:
N/A (Air-cooled engine)
Common Wear Items:
Brake shoes, tires, drive chain and sprockets, air filter, spark plug, carburetor jets (clogging).
Potential Issues:
Carburetor synchronization and cleaning due to ethanol fuels, electrical connections corrosion, suspension seal leaks (if applicable).
Yamaha Motorcycle Division:
Yamaha Motor Corporation has a long and rich history of producing innovative and reliable motorcycles since its inception.
Trailway Series:
The Trailway 125 was part of Yamaha's lineup of accessible and practical motorcycles aimed at a broad range of riders.
Manufacturing Location:
Likely manufactured in Japan or Southeast Asia by Yamaha.
Production Period:
The specific generation covered spans from 1999 to 2004.
