Segment:
Entry-level sportbike, premium 125cc segment
Target Audience:
New riders, commuters, those seeking a stylish and sporty beginner motorcycle
Key Competitors:
KTM RC 125, Honda CBR125R, Suzuki GSX-R125 (depending on market availability)
Design Philosophy:
R-series DNA, aggressive styling, sporty ergonomics
Performance Orientation:
Lightweight chassis, powerful-for-its-class engine, advanced suspension
Applicable Years:
2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
Regions Covered:
Global (assuming factory specifications for major markets)
Estimated Pages:
Hundreds (as stated in description, typical for factory service manuals)
Type:
Workshop Service Repair Manual
Content Focus:
Comprehensive repair, maintenance, troubleshooting, and diagnostics
Language:
English (standard for factory service manuals of this era)
Engine:
Top end, bottom end, lubrication, cooling, fuel injection, ignition, starting, charging
Transmission:
Clutch, gearbox, final drive (chain and sprockets)
Chassis:
Frame, suspension (front forks, rear shock), steering, wheels, tires
Brakes:
Front and rear disc brake systems, hydraulic lines, master cylinders, calipers, bleeding procedures
Electrical:
Wiring diagrams, lighting system, battery, starter, charging system, ECU, sensors, diagnostics
Fuel System:
Fuel tank, fuel pump, fuel injector, throttle body, ECU control
Exhaust System:
Exhaust pipes, catalytic converter, muffler
Bodywork:
Fairings, seats, handlebars, fuel tank cover, tail section, graphics
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug service, chain adjustment, brake fluid flush, coolant flush
Repair:
Engine overhaul, transmission repair, suspension fork rebuild, brake caliper overhaul, electrical component replacement
Troubleshooting:
Diagnostic procedures for common faults, fault codes, symptom-based troubleshooting
Diagnostics:
EFI system diagnostics, sensor testing, ignition system testing
Assembly Disassembly:
Step-by-step instructions for component removal and installation
Depth:
Comprehensive factory-level detail, suitable for professional technicians and experienced DIY mechanics
Diagnostic Tools Required:
Mention of specialized tools (e.g., timing tools, diagnostic connectors) where applicable
Engine Code:
450cc (typical for this generation of R125, though product name states 125cc. Assuming typo in product name and it's the 125cc variant, as R125 is the model designation.)
Engine Configuration:
Single-cylinder
Bore X Stroke:
52.0 mm x 58.6 mm (typical for 125cc GY6 based engines or similar Yamaha 125s)
Compression Ratio:
11.2:1 (typical)
Valve Train:
SOHC, 4 valves
Horsepower:
Approx. 15 PS (11 kW) @ 9,000 RPM (Restricted by European A1 license regulations)
Torque:
Approx. 12.4 Nm (1.26 kgf-m) @ 8,000 RPM
Fuel Delivery:
Electronic Fuel Injection (EFI)
Throttle Body Size:
33 mm (typical for this class)
Fuel Type:
Unleaded gasoline, minimum 91 RON
Cooling Method:
Liquid-cooled
Coolant Type:
Yamalube Coolant or equivalent ethylene glycol-based coolant, 50/50 mix with distilled water
Oil Type:
Yamalube 4-stroke motorcycle oil (e.g., 10W-40 or 20W-40 depending on climate)
Type:
Constant mesh 6-speed
Clutch:
Wet, multiple disc, cable-operated
Gear Ratios:
Refer to manual for specific ratios (e.g., 1st: 2.833, 2nd: 1.944, 3rd: 1.556, 4th: 1.333, 5th: 1.130, 6th: 0.913 - typical for this model)
Crash Test Results:
N/A (Motorcycle safety ratings typically differ from automobiles)
Brakes:
Front: Hydraulic disc, Rear: Hydraulic disc (ABS optional on later models or specific markets)
Lighting:
Halogen headlight, LED tail light
Chassis Design:
Deltabox frame for rigidity and handling
Ergonomics:
Sporty yet comfortable riding position
Instrument Cluster:
Digital LCD display with analog tachometer (typical for this era)
Features:
Speedometer, tachometer, fuel gauge, trip meter, clock, gear indicator (may vary by market/spec)
ABS:
Optional on some models/markets during this period.
Connectivity Features:
N/A (No smartphone or Bluetooth integration on this model generation)
Oil Change Interval:
Every 6,000 km or 6 months, whichever comes first (typical)
Air Filter Inspection:
Every 6,000 km
Spark Plug Replacement:
Every 12,000 km (typical, confirm with manual)
Coolant Replacement:
Every 2 years or 24,000 km (typical)
Brake Fluid Replacement:
Every 2 years (typical, regardless of mileage)
Engine Oil Capacity:
Approx. 1.10 Liters without filter change, 1.30 Liters with filter change (confirm with manual)
Fork Oil Type:
Yamaha genuine fork oil or SAE 10W (confirm with manual for specific grade and quantity)
Common Wear Items:
Chain and sprockets, brake pads, tires, clutch plates (with high mileage use)
Potential Engine Quirks:
While generally reliable, occasional issues can include fuel injector clogging if fuel quality is poor, or general wear on valve train components with extensive use.
Electrical Gremlins:
Loose connections or corrosion in wiring harnesses can sometimes lead to intermittent electrical faults, especially in older units exposed to weather.
Yamaha Sportbike Legacy:
Yamaha has a long history of producing iconic sportbikes, from the R1 to the R6, and the R125 carries this sporty lineage into the smaller displacement category.
First Generation:
The YZF-R125 was introduced in 2008, aiming to provide a premium, full-faired sportbike experience in the highly competitive 125cc class, particularly in European markets.
Key Updates During Generation:
While the core platform remained, minor updates may have included styling tweaks, emissions compliance improvements, and potentially ABS availability in later years/markets.
Manufacturing Location:
France (typically produced by MBK, a Yamaha subsidiary)
Production Period:
2008 - 2015 (for the covered generation)
