Market Segment:
Entry-level urban commuter scooter, popular in markets seeking economical and convenient personal transportation.
Competitors:
Competes with other 50cc scooters from brands like Kymco, SYM, Yamaha (e.g., Jog), Honda (e.g., Dio), and various Chinese manufacturers.
Manual Features:
Detailed illustrations, diagrams, wiring schematics, step-by-step instructions, printable pages, troubleshooting assistance.
Value Proposition:
An inexpensive way to keep the Hyosung Prima SF 50 SF50 working properly, empowering owners with the knowledge for maintenance and repair.
Primary Coverage:
Hyosung Prima SF 50 SF50
Secondary Coverage:
Includes general information, engine mechanical, engine electrical, emission control, fuel system, suspension, clutch, transaxle (manual and automatic), driveshaft/axle, steering, brakes, body interior/exterior, body electrical, and restraint systems.
Estimated Page Count:
While not explicitly stated, comprehensive workshop manuals typically range from 200-500+ pages depending on the vehicle complexity.
Manual Type:
Workshop Service Repair Manual
Delivery Method:
Instant Download
Requirements:
Adobe PDF Reader, WinZip
Compatibility:
All Versions of Windows & Mac
Engine Mechanical:
Detailed procedures for engine assembly, disassembly, cylinder head, piston, crankshaft, oil seals, gaskets, lubrication system, cooling system (if applicable).
Engine Electrical:
Ignition system, starting system, charging system, lighting system, wiring diagrams, component testing.
Emission Control:
Information on emission control systems, potentially including carburetor adjustments, exhaust components, and related sensors.
Fuel System:
Fuel tank, fuel lines, fuel pump (if applicable), carburetor operation, adjustment, and overhaul, air filter service.
Suspension System:
Front forks, rear shock absorbers, linkage, adjustments, and replacement procedures.
Clutch System:
Automatic centrifugal clutch operation, maintenance, and replacement, or manual clutch components if applicable.
Transaxle System:
Details on the transmission, likely a CVT (Continuously Variable Transmission) for this model, including variator, drive and driven pulleys, belt inspection and replacement.
Steering System:
Handlebar, steering stem, bearings, and related components, including adjustment and lubrication.
Brake System:
Front and rear brake mechanisms (likely drum or disc), brake fluid, brake lines, master cylinder, caliper, and bleeding procedures.
Body Interior Exterior:
Body panels, seat, fairings, storage compartments, lighting, and trim removal/installation.
Body Electrical:
Headlight, taillight, turn signals, brake light, horn, battery, wiring harness, fuses, switches.
Restraint System:
Information related to rider safety, which for a scooter would primarily involve braking system integrity and potentially any integrated seatbelt systems if present (though unlikely for a 50cc scooter).
Maintenance Procedures:
Oil changes, filter replacements, spark plug service, brake adjustments, chain/belt tensioning (if applicable), tire pressure checks, general cleaning and lubrication.
Troubleshooting Guides:
Diagnostic procedures for common issues, symptom-based troubleshooting, electrical fault finding.
Repair Procedures:
Step-by-step instructions for component disassembly, overhaul, reassembly, and replacement.
Electrical Diagnostics:
Detailed wiring diagrams, component testing procedures, troubleshooting of electrical faults.
Technical Depth:
Comprehensive, covering basic maintenance to advanced engine and electrical system repairs. Designed for both DIY enthusiasts and professional mechanics.
Engine Type:
Air-cooled, 2-stroke, single-cylinder (typical for this class)
Displacement:
Approximately 49.2cc (standard for 50cc class, precise figure may vary by sub-model)
Horsepower:
Typically in the range of 3.0-4.5 HP, depending on tuning and specific model year.
Torque:
Low-end torque optimized for acceleration in urban environments.
Carburetor:
Likely a Mikuni or Keihin brand carburetor, specific model number would be in the manual. Requires proper adjustment for optimal performance and emissions.
Fuel Type:
Unleaded gasoline with appropriate 2-stroke oil mixture or separate oil injection system.
Cooling Method:
Air-cooled
Length:
Specifications vary, but typical for 50cc scooters would be around 1700-1850 mm.
Width:
Specifications vary, but typical for 50cc scooters would be around 650-750 mm.
Height:
Specifications vary, but typical for 50cc scooters would be around 1050-1150 mm.
Dry Weight:
Typically in the range of 75-95 kg.
Max Payload Capacity:
Generally around 150-200 kg, including rider and cargo.
Oil Change Interval:
Typically every 1,000-2,000 km or 6-12 months for the engine oil (if applicable, or gearbox oil for scooters).
Air Filter Replacement:
Inspect every few thousand km, replace as needed based on condition or every 10,000-15,000 km.
Spark Plug Replacement:
Replace every 5,000-10,000 km or as recommended by the manufacturer.
Belt Replacement:
CVT belt inspection and replacement typically recommended every 15,000-25,000 km.
Engine Oil Type:
Specific grade will be in the manual (e.g., SAE 10W-40 or 20W-50), typically JASO MA certified for wet clutches.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid, depending on the system specification.
2 Stroke Oil Type:
High-quality 2-stroke scooter oil, pre-mix or injection type as per system.
Common Issues:
Wear and tear on CVT components (belt, rollers), carburetor clogging due to infrequent use or poor fuel quality, electrical connections becoming loose, exhaust system corrosion.
