Original Market Segment:
Yamaha's RX-G 135 was positioned as a performance-oriented, sporty lightweight motorcycle, popular in markets like India and Southeast Asia for its distinctive styling and punchy two-stroke performance.
Key Competitors:
Competed against similar displacement two-stroke motorcycles from manufacturers like Suzuki (e.g., Shogun, Samurai), Honda (e.g., CBX/CD series variants), and other regional players.
Distinctive Attributes:
Known for its aggressive styling, powerful 135cc two-stroke engine, and often featuring performance enhancements and a sporty riding posture. The 'G' designation often implied enhanced features or sportier variants.
Manual Value:
Enables owners and mechanics to perform comprehensive maintenance and repairs, saving significant costs compared to dealership servicing. Provides access to factory-level technical data.
Engine Mechanical:
Complete engine disassembly, assembly, inspection, and repair of all internal components (piston, rings, cylinder, crankshaft, connecting rods, bearings, valves, camshafts, timing system).
Engine Management Electrical:
Ignition system diagnosis and repair, CDI unit, spark plug specifications, wiring diagrams, charging system (stator, rectifier/regulator), starting system (starter motor, starter clutch).
Fuel System:
Carburetor (Mikuni VM series likely) disassembly, cleaning, adjustment, jetting specifications, fuel tank, fuel lines, fuel petcock.
Cooling System:
Air cooling system specifics, engine thermal management.
Exhaust System:
Exhaust pipe and silencer inspection, sealing, and potential maintenance.
Transmission Drivetrain:
Clutch operation (likely wet multi-plate), clutch plate replacement, gearbox disassembly, inspection, gear ratio specifications, chain drive maintenance and adjustment.
Chassis Frame:
Frame inspection, steering head bearing maintenance, front fork overhaul (oil changes, seal replacement, spring specifications), rear shock absorber inspection and replacement.
Brakes:
Front and rear brake system diagnosis and repair, brake pad replacement, brake fluid specifications, bleeding procedures, caliper and master cylinder service.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure specifications, wheel balancing, spoke tension adjustment (if applicable).
Electrical System Lighting:
Headlight, taillight, turn signals, brake light, horn, instrument panel illumination, wiring diagrams for all electrical components.
Bodywork Trim:
Fairing removal and installation, seat maintenance, fuel tank removal, fender inspection.
Routine Maintenance:
Oil change procedures, filter replacement, air filter cleaning/replacement, spark plug replacement, chain lubrication and adjustment, brake adjustments, tire pressure checks.
Troubleshooting Diagnostics:
Systematic diagnostic flowcharts for common problems, identification of causes for poor performance, starting issues, electrical faults.
Engine Rebuild:
Step-by-step instructions for complete engine disassembly, overhaul, and reassembly, including torque specifications and clearances.
Transmission Service:
Gearbox disassembly, inspection of gears, shift drum, shift forks, and reassembly procedures.
Suspension Fork Rebuild:
Front fork seal replacement, oil level and type specifications, damping adjustments.
Brake System Overhaul:
Brake caliper servicing, master cylinder rebuilding, brake line bleeding techniques.
Electrical Component Testing:
Testing of ignition coils, CDI unit, stator windings, rectifier/regulator using multimeters.
Carburetor Tuning:
Jetting recommendations, idle speed adjustment, mixture screw settings for optimal performance.
Depth Of Information:
Professional Quality / In-depth Service & Repair. Covers everything from basic maintenance to complete engine and component overhauls. Includes detailed specifications, torque values, and diagnostic procedures.
Engine Type:
Two-stroke, single-cylinder
Displacement:
135 cc (approximate, confirmed by model name)
Bore X Stroke:
Specifics to be found within the manual, typical for this era might be around 56mm x 54mm.
Cooling System:
Air-cooled
Power Output Hp:
Typically in the range of 13-16 HP, dependent on tuning and market regulations.
Torque Nm:
Specifics to be found within the manual, likely around 12-14 Nm.
Compression Ratio:
To be detailed in the manual.
Carburetor Type:
Likely a single Mikuni VM series carburetor (e.g., VM26 or similar).
Fuel Type:
Unleaded gasoline, typically requires oil mixing for two-stroke engines (pre-mix or autolube system).
Autolube System:
Likely features an automatic lubrication system for premixing oil and fuel.
Engine Oil Change:
Typically every 2,000-3,000 km or annually. Specific interval detailed in manual.
Spark Plug Replacement:
Recommended at 3,000-5,000 km, or as per manual's diagnostic indicators.
Chain Maintenance:
Lubrication and adjustment every 500-1000 km, or after riding in wet conditions.
Air Filter Cleaning:
Recommended every 2,000-3,000 km, depending on operating conditions.
Engine Oil Type:
2-stroke engine oil (specific API/JASO rating to be confirmed in manual, e.g., API TC, JASO FD).
Transmission Oil Type:
Motorcycle-specific gear oil (e.g., SAE 80 or 10W-30 API GL-4). Manual will specify exact type and viscosity.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid, depending on system specifications.
Fork Oil Type:
Motorcycle-specific fork oil, viscosity to be confirmed in manual (e.g., SAE 10W).
Common Two Stroke Concerns:
Carbon buildup in combustion chamber, exhaust port clogging, piston ring wear, clutch wear, sticky reed valves, carburetor jetting sensitivity to altitude and temperature.
Electrical Issues:
Corroded wiring connections, failing rectifier/regulator, weak battery charging.