Market Position:
The Yamaha T135 (often known as the 135cc underbone motorcycle) was positioned as a practical, fuel-efficient, and reliable commuter and light sport motorcycle in various Asian markets.
Competitive Analysis:
Competed directly with other 135cc to 150cc underbone motorcycles from brands like Honda (e.g., Wave series, Future series) and Suzuki, emphasizing performance and durability.
Key Features:
Sporty design for an underbone, capable 135cc engine, often featuring disc brakes, comfortable riding posture, and Yamaha's renowned reliability.
Manual Purpose:
To enable users to understand and perform repairs, maintenance, and overhauls on the Yamaha T135, aiming for quality service and optimal vehicle performance.
Value Proposition:
Empowers owners and technicians to perform professional-level repairs and maintenance, saving costs and ensuring longevity of the vehicle.
Applicable Model Years:
2005, 2006, 2007, 2008, 2009, 2010
Manual Type:
Workshop Service Manual
Target Audience:
Professional mechanical technicians and experienced DIY enthusiasts familiar with motorcycle mechanics.
Delivery Method:
Fast and Free Electronic Delivery via Email
Content Emphasis:
Emphasizes special aspects of the product and includes instructions for proprietary components.
Systems Covered:
Engine, Fuel System, Ignition System, Lubrication System, Exhaust System, Electrical System, Chassis, Bodywork, Transmission
Procedures Included:
Routine Maintenance, Troubleshooting, Diagnosis, Repair, Overhaul, Removal and Installation, Assembly and Disassembly, Tune-ups
Technical Depth:
Comprehensive; covers basic maintenance to in-depth engine and transmission rebuilds, including proprietary component instructions.
Technical Areas Covered:
Detailed diagrams, specifications, torque values, troubleshooting charts, electrical schematics, part identification, overhaul procedures for all major components.
Special Tool Requirements:
Identifies and illustrates specific Yamaha special tools required for certain adjustments or repairs, with corresponding part numbers.
Troubleshooting Methodology:
Provides structured diagnostic procedures and flowcharts to identify the root cause of problems.
Bodywork Procedures:
Includes removal, installation, and maintenance of fairings, seat, fuel tank cover, fenders, and other body panels.
Frame Chassis Procedures:
Information on steering bearing maintenance, wheel bearing inspection, and general chassis component checks.
Safety Information Symbols:
Uses 'WARNING,' 'CAUTION,' and 'NOTE' symbols to highlight critical safety and procedural information.
Engine Type:
4-stroke, SOHC, 4-valve
Bore X Stroke:
54 mm x 58.7 mm (typical)
Compression Ratio:
Approx. 10.4:1
Horsepower:
Approx. 11-12 HP @ 8000 RPM (varies by market and tuning)
Torque:
Approx. 10-11 Nm @ 6000 RPM (varies by market and tuning)
Fuel Delivery System:
Carburetor (likely Mikuni BS26 or similar)
Fuel Type:
Unleaded Gasoline
Oil Type:
Yamalube 4 (or equivalent API SG or higher, SAE 20W-40, 10W-30, or 10W-40)
Oil Capacity:
Approx. 0.95 L (without filter change), 1.05 L (with filter change)
Cooling System:
Forced Air Cooling
Ignition System Type:
CDI (Capacitor Discharge Ignition)
Engine Components Covered:
Cylinder, piston, crankshaft, connecting rod, camshaft, valves, timing chain, oil pump, etc.
Performance Tuning Considerations:
While primarily a service manual, it provides baseline specifications that are crucial for understanding potential performance modifications.
Transmission Type:
4-speed Rotary
Clutch Type:
Wet, multiple-disc, centrifugal
Optional Transmission Types:
N/A (typically single configuration)
Transmission Features:
Semi-automatic operation with automatic clutch engagement/disengagement.
Gear Ratios:
Detailed gear ratios for each speed are provided within the manual, essential for performance tuning and diagnosis.
Safety Ratings:
N/A (Motorcycle; specific crash ratings not applicable in the same way as cars)
Active Safety Features:
Front Disc Brake, Rear Drum Brake (or Disc on higher trims), adequate lighting system.
Passive Safety Features:
Frame integrity, rider ergonomics for control, durable bodywork.
Oil Change Interval:
Every 3,000 km or 3 months, whichever comes first (refer to manual for specific recommendations).
Spark Plug Replacement:
Every 6,000 km or 6 months (check and gap periodically).
Air Filter Cleaning:
Every 3,000 km (clean and inspect), replace as needed.
Valve Clearance Check:
Every 6,000 km or 12 months.
Engine Oil Specification:
Yamalube 4 (or API SG, JASO MA, SAE 20W-40, 10W-30, or 10W-40)
Brake Fluid Type:
DOT 3 or DOT 4 (if equipped with disc brakes)
Common Issues:
Potential for carburetor adjustments, normal wear and tear on clutch components, chain and sprocket wear, electrical connection corrosion in humid climates.
Typical Repairs:
Carburetor cleaning/rebuilding, clutch adjustment/replacement, engine decarbonization, chain and sprocket replacement, electrical system maintenance.
Parts Information:
Includes diagrams for part identification and reference, assisting in ordering correct replacement components.
Brake System Maintenance:
Procedures for inspecting, servicing, and replacing brake pads, rotors, calipers, and bleeding the brake system.
Electrical System Maintenance:
Covers battery maintenance, charging system checks (stator, regulator/rectifier), lighting system, and starter motor system.
Suspension Maintenance:
Guidance on fork oil changes, seal inspection, and rear shock absorber servicing or replacement.
Wheel Tire Specifications:
Typically specifies tire sizes (e.g., 70/90-17 front, 80/90-17 rear) and recommended tire pressures, as well as wheel nut torque.
Brand Heritage:
Yamaha Motor Company, established in 1955, has a long and successful history in motorcycle manufacturing, known for innovation, performance, and reliability across various segments.
Model Evolution:
The T135 was a significant model in Yamaha's underbone lineup, building upon previous designs and introducing modern features and a more performance-oriented engine for its class. It has seen numerous updates and regional variations since its introduction.
Production Period:
2005-2010 for the specified manual coverage. Production has continued with updates.
Manufacturing Locations:
Primarily produced in Southeast Asian countries, including Indonesia and Malaysia, for regional markets.
Model Significance:
The T135 represented a significant step in Yamaha's affordable and performance-oriented underbone segment, popular for its balance of power, fuel efficiency, and sporty aesthetics.
