Market Position:
The Yamaha T135 (Sniper/Jupiter MX/Spark 135/Exciter/135LC) is a highly popular underbone motorcycle, known for its performance, reliability, and fuel efficiency in Southeast Asian markets. This manual is essential for owners and technicians who service these widely distributed models.
Competitors:
Competes with other 130-135cc underbone motorcycles from brands like Honda (e.g., Supra X 125, Wave 125), Suzuki (e.g., Raider J 115), and Kawasaki (e.g., Modenas Kriss 120).
Key Features:
Focuses on a robust single-cylinder engine, sporty design, and practical commuting capabilities.
Systems Covered:
General Information, Specifications, Periodic Checks and Adjustments, Engine, Cooling System, Carburetor, Chassis, Electrical System, Troubleshooting
Page Count:
Estimated 200-300 pages (typical for this class of service manual)
Manual Type:
Service Repair Manual
Format:
Digital (likely PDF)
Engine System:
Comprehensive coverage including disassembly, assembly, inspection, and repair of all engine components (cylinder head, piston, crankshaft, connecting rod, camshaft, valves, timing chain, etc.)
Cooling System:
Details on radiator, coolant flow, thermostat operation, and related components.
Fuel System:
In-depth coverage of the carburetor system, including tuning, cleaning, jetting, and troubleshooting.
Chassis System:
Information on frame, suspension (front forks, rear shock absorber), steering system, wheels, tires, and brakes.
Electrical System:
Wiring diagrams, ignition system, lighting, starting system, charging system, battery maintenance, and electronic component testing.
Maintenance Procedures:
Scheduled maintenance, oil changes, filter replacements, spark plug replacement, chain adjustment, brake adjustments, valve clearance checks.
Repair Procedures:
Step-by-step instructions for engine overhaul, transmission repair, suspension component replacement, electrical component repair, and bodywork adjustments.
Troubleshooting Procedures:
Systematic approach to diagnosing and resolving common performance issues, starting problems, electrical faults, and mechanical noise.
Technical Depth:
Comprehensive from basic owner maintenance to advanced engine rebuilds and electrical diagnostics. Suitable for both DIY enthusiasts and professional mechanics.
Engine Type:
4-stroke, SOHC, 4-valve
Bore X Stroke:
54.0 x 58.7 mm
Compression Ratio:
Approximately 9.0:1 to 9.5:1 (model dependent)
Horsepower Approx:
Around 10-12 HP (9.7 kW) @ 7500-8000 RPM
Torque Approx:
Around 10-11 Nm @ 6000-6500 RPM
Fuel Delivery:
Carburetor (e.g., Mikuni VM20-type or similar)
Fuel Type:
Unleaded Gasoline
Oil Type:
API SG or higher, SAE 10W-40 motorcycle oil recommended (specific grade may vary, check manual)
Ignition System:
CDI (Capacitor Discharge Ignition)
Transmission Type:
4-speed or 5-speed Rotary or Constant Mesh (model dependent), automatic clutch
Optional Transmissions:
N/A (typically a single standard transmission type per model variant)
Clutch Type:
Wet, multi-plate, automatic
Transmission Oil Type:
Refer to engine oil specifications (often shared or specific gear oil)
Safety Ratings:
N/A (Motorcycles are typically not rated by crash test organizations in the same way cars are, but structural integrity and braking performance are key.)
Braking System Front:
Disc Brake (Hydraulic)
Braking System Rear:
Disc Brake (Hydraulic) or Drum Brake (model dependent)
Lighting:
Halogen Headlight, LED or Incandescent Tail/Brake Lights, Turn Signals
Frame Construction:
Steel Backbone Frame
Suspension Design:
Telescopic Front Forks, Swingarm Rear Suspension with Monoshock (typically)
Infotainment System:
Basic analog or digital instrumentation cluster (speedometer, odometer, fuel gauge, gear indicator on some variants). No advanced infotainment systems.
Driver Assistance Features:
N/A (Focus is on core mechanical and electrical systems for operation).
Connectivity Features:
N/A
Engine Oil Change:
Every 3,000-4,000 km or 6 months, whichever comes first (refer to manual for exact interval and condition).
Spark Plug Replacement:
Every 10,000-12,000 km (check condition more frequently).
Air Filter Cleaning:
Every 4,000-6,000 km (clean and re-oil if necessary).
Valve Clearance Check:
Every 8,000-10,000 km.
Engine Oil Capacity:
Approx. 0.95 - 1.0 Liters (without oil filter change), 1.1 Liters (with oil filter change) - always verify in manual.
Brake Fluid Type:
DOT 3 or DOT 4 (check reservoir cap or manual).
Common Issues:
Valve clearance adjustment required as engine ages, occasional carburetor cleaning/adjustment for performance consistency, chain wear, general wear and tear on suspension components due to usage.
Brand Heritage:
Yamaha Motor Company, established in 1955, is renowned for its high-performance motorcycles, musical instruments, and other motorized products. It has a long history of innovation and success in motorsports.
Model Lineage:
The T135 platform has been a cornerstone of Yamaha's underbone segment, evolving from earlier models and continually updated to meet market demands for performance and efficiency. It represents Yamaha's expertise in small-displacement, high-revving engines.
Production Location:
Primarily manufactured in Southeast Asian countries, including Indonesia and Thailand, to serve those markets.
Initial Release Year:
The T135 platform was introduced in the early 2000s, with significant updates and variations appearing by 2005.
