Segment:
Entry-level supersport/sportbike segment.
Target Audience:
New riders, commuters, and those seeking a stylish, sporty motorcycle with manageable power and running costs.
Competitors:
Honda CBR125R, KTM RC 125, Aprilia RS4 125, Suzuki GSX-R125 (later models).
Design Philosophy:
Inspired by Yamaha's larger R-series sportbikes, offering aggressive styling and sporty ergonomics.
Engine Type:
Liquid-cooled, four-stroke, single-cylinder, SOHC, 4-valve engine with fuel injection.
Engine:
Complete engine disassembly, assembly, troubleshooting, specifications, and tuning for the RE06 engine.
Fuel System:
Fuel injection system (throttle body, injectors, ECU, sensors), fuel pump, fuel lines, and evaporative emission control system.
Ignition System:
Ignition coil, spark plug, CDI unit, and related wiring.
Cooling System:
Radiator, coolant hoses, water pump, thermostat, and fan operation.
Exhaust System:
Exhaust manifold, catalytic converter (if applicable for the region), muffler, and lambda sensor (oxygen sensor).
Transmission:
Clutch operation and adjustment, gearbox disassembly and assembly, gear shift mechanism, and lubrication.
Chassis:
Frame inspection and repair, front forks (suspension, seals, oil), rear shock absorber, swingarm, and steering system.
Brakes:
Front and rear brake system diagnostics, caliper service, master cylinder overhaul, brake line replacement, and bleeding procedures.
Wheels And Tires:
Wheel bearing inspection and replacement, tire fitting and balancing, and recommended tire pressures.
Electrical System:
Wiring diagrams, battery maintenance, starter motor, alternator, lighting system, instrumentation, and sensors.
Bodywork And Trim:
Fairing removal and installation, seat, fuel tank, and minor body panel repairs.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustment, brake fluid replacement, and coolant flush.
Troubleshooting:
Diagnostic flowcharts for common problems, fault code interpretation (if applicable), and symptom-based repair guidance.
Repair:
Step-by-step instructions for component removal, repair, and reinstallation, including torque specifications.
Overhaul:
Detailed procedures for complete engine teardown and rebuild, transmission overhauls, and suspension rebuilds.
Diagnostics:
Procedures for diagnosing electrical faults, engine performance issues, and chassis-related problems.
Depth:
Comprehensive, covering basic to advanced repairs, diagnostics, and complete component overhauls, suitable for professional technicians and skilled DIY enthusiasts.
Engine Type:
Single-cylinder, liquid-cooled, 4-stroke, SOHC, 4-valve
Bore X Stroke:
52.0 mm x 58.6 mm
Compression Ratio:
11.2:1
Lubrication System:
Wet sump
Peak Horsepower:
Approximately 15 PS (11.0 kW) at 8,500 rpm (Europe/Asia specifications may vary slightly, often restricted for A1 license compliance)
Peak Torque:
Approximately 12 Nm (8.9 lb-ft) at 7,500 rpm (Europe/Asia specifications may vary slightly)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON)
Fuel Tank Capacity:
13.8 Liters (3.65 US gallons)
Instrument Cluster:
Digital LCD instrument panel displaying speed, RPM (bar graph tachometer), fuel level, gear position, odometer, trip meters, clock, and warning lights.
ABS:
Optional on some later models, not standard across the entire production run. Refer to specific model year and market.
Connectivity Features:
N/A (No modern Bluetooth or smartphone integration)
Oil Change:
Every 5,000 km or 6 months, whichever comes first (refer to manual for exact specification).
Air Filter Cleaning:
Every 10,000 km or 12 months.
Spark Plug Replacement:
Every 20,000 km or 24 months.
Coolant Replacement:
Every 2 years.
Valve Clearance Check:
Every 20,000 km or 24 months.
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Engine Oil Capacity:
1.70 Liters (without filter change), 1.80 Liters (with filter change).
Coolant Type:
High-quality, permanent type antifreeze coolant (50% mixture with distilled water).
Common Complaints:
Occasional electrical connector corrosion in humid climates, wear on the cam chain tensioner at higher mileages, and potential for front fork seal leaks if subjected to harsh use or impacts. Clutch slave cylinder seal can sometimes weep.
