Segment:
Lightweight Scooter (50cc Class)
Target Audience:
Urban commuters, novice riders, budget-conscious consumers.
Key Competitors:
Honda Dio, Suzuki Address, Kymco Like, various Chinese market scooters.
Engine Type:
Air-cooled, 2-stroke, single-cylinder
Transmission Type:
Automatic CVT
Performance Characteristics:
Nimble handling, fuel efficiency, ease of operation.
Design Philosophy:
Practical, reliable, user-friendly urban mobility solution.
Engine Mechanical:
Complete overhaul, disassembly, assembly, inspection, tuning (carburetor, ignition timing), valve clearance, compression testing.
Engine Electrical:
Ignition system, starting system, charging system (stator, rectifier, battery), lighting, indicators, wiring diagrams.
Fuel System:
Carburetor inspection, cleaning, adjustment, fuel tank, fuel pump (if applicable), fuel lines.
Transmission:
Automatic CVT (Continuously Variable Transmission) maintenance, belt replacement, clutch inspection, variator inspection.
Brakes:
Front and rear brake system inspection, hydraulic system maintenance, pad replacement, caliper overhaul, brake fluid replacement.
Suspension:
Front fork inspection, seal replacement, oil change. Rear shock absorber inspection and replacement.
Cooling System:
Air-cooled engine systems, cooling fins cleaning.
Exhaust System:
Exhaust pipe inspection, muffler maintenance, gasket replacement.
Frame And Bodywork:
Body panel removal and installation, seat, handlebars, footpegs, frame inspection.
Electrical Diagrams:
Comprehensive wiring diagrams with color coding and component identification.
Preventative Maintenance:
Scheduled maintenance tasks, lubrication points, fluid checks, bolt torque specifications.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, symptom-based troubleshooting charts.
Repair And Rebuild:
Step-by-step instructions for component removal, repair, and reinstallation, including engine and transmission overhauls.
Adjustment And Tuning:
Carburetor adjustments, ignition timing settings, idle speed control, brake lever free play.
Special Tools:
Listing and usage instructions for required specialized tools.
Depth Level:
Comprehensive (from basic maintenance to complete engine/transmission rebuilds).
Engine Type:
2-stroke, air-cooled
Bore X Stroke:
39.0 mm x 41.4 mm (typical)
Compression Ratio:
7.4:1 (typical)
Carburetor Model:
Mikuni VM15SH or similar
Ignition System:
CDI (Capacitor Discharge Ignition)
Horsepower:
Approx. 4.0 - 4.5 HP @ 7000 RPM (typical)
Torque:
Approx. 0.35 - 0.40 kgf-m @ 6500 RPM (typical)
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Fuel Tank Capacity:
Approx. 4.0 Liters
Oil Type 2 Stroke:
Yamaha's recommended 2-stroke engine oil (e.g., Yamalube 2M)
Oil Mixing Ratio:
Pre-mix or Autolube system (depends on specific JOG variant, manual will clarify)
Crash Test Ratings:
N/A (Motorcycle safety is assessed differently, focus on component integrity)
Braking System:
Drum brakes front and rear (some markets may have disc front)
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Frame Construction:
Steel tube frame for rigidity and durability.
Tires:
Tubeless or tube-type, typically 10-inch diameter
First Service:
Check/adjust CVT belt, check brake system, check oil level, check tire pressure, clean air filter (typically at 1000 km or 6 months).
Periodic Maintenance:
Replace CVT belt (every 15,000-20,000 km), replace spark plug (every 5,000-10,000 km), replace air filter (every 5,000-10,000 km), replace gear oil (every 5,000-10,000 km), replace brake fluid (every 2 years), decarbonize engine (as needed).
Engine Oil:
Yamalube 2M or equivalent API Service TC rated 2-stroke oil.
Transmission Oil:
Yamaha Genuine Gear Oil or SAE 80 API GL-4 (e.g., 90ml capacity).
Brake Fluid:
DOT 3 or DOT 4 (check manual for specific type).
Coolant:
N/A (Air-cooled engine)
Common Wear Items:
CVT belt wear, worn brake pads, carburetor clogging due to fuel quality, weak starter motor, aging electrical connections.
Performance Degradation:
Loss of power can be due to worn piston rings, clogged exhaust, or incorrect carburetor tuning.
Manufacturer:
Yamaha Motor Corporation, Japan
Jog Introduction:
The Yamaha JOG series has a long history, originating in the early 1980s, evolving through numerous iterations to meet market demands for reliable and affordable urban transport.
Sa16J Generation:
The SA16J chassis code typically denotes the JOG model produced around the turn of the millennium, representing a refinement of previous designs with updated styling and components.
Manufacturing Locations:
Primarily Japan, with some production or assembly likely in other Asian countries depending on market.
Notable Variants:
JOG-ZII, JOG-ZR, JOG Aprio, JOG Poet (manual will specify coverage for SA16J variants)
