Segment:
Lightweight scooter, primarily for urban commuting and short-distance travel.
Target Audience:
Commuters, students, riders seeking an economical and maneuverable two-wheeler.
Competitors:
Competes with other 50cc and 100cc scooters from brands like Honda (Dio, Zoomer), Yamaha (Jog, Vino), Kymco, and PGO.
Design:
Retro-modern styling, compact and lightweight chassis for agility.
Engine Options:
Available in 50cc and 100cc engine variants, offering different power and performance levels.
Practicality:
Low seat height, under-seat storage, user-friendly controls.
Engine:
Detailed engine overhaul, diagnosis, performance tuning, fuel injection/carburetor systems, ignition, cooling, lubrication, starting, and charging systems.
Transmission:
Automatic transmission (CVT) system, including variator, clutch, and final drive overhaul and maintenance.
Brakes:
Front and rear brake system inspection, servicing, caliper overhaul, fluid replacement, and component diagnosis.
Electrical:
Complete electrical system schematics, wiring diagrams, component testing, battery, lighting, ignition, and accessory systems.
Chassis:
Frame, suspension (front fork, rear shock absorber), steering system, wheels, and tires.
Bodywork:
Body panel removal and installation, fairings, seat, storage compartments, and cosmetic components.
Fuel System:
Fuel tank, fuel pump (if applicable), fuel lines, carburetor or fuel injection unit maintenance and adjustment.
Maintenance:
Routine maintenance procedures, service intervals, oil changes, filter replacements, spark plug checks, belt tensioning, and brake adjustments.
Troubleshooting:
Step-by-step diagnostic procedures for common and complex issues, fault code interpretation, and problem resolution guides.
Repair:
Detailed repair instructions for all major and minor components, including engine rebuild, transmission overhaul, electrical component replacement, and chassis repairs.
Rebuilding:
Comprehensive instructions for rebuilding engine assemblies, transmissions, and other key mechanical components.
Refurbishment:
Guidance on restoring worn or damaged components and systems to optimal working condition.
Restoration:
Information potentially useful for restoring older models, focusing on maintaining original specifications and functionality.
Torque Specifications:
Precise torque values for all critical fasteners and bolts across all vehicle systems.
Special Tools:
Identification and usage instructions for specialized tools required for specific maintenance and repair procedures.
Depth:
Comprehensive, covering from basic maintenance checks to complete engine and transmission rebuilds.
Mfr Code 50Cc:
e.g., SA10A (specific internal SYM code, check manual for exact)
Mfr Code 100Cc:
e.g., SA20A (specific internal SYM code, check manual for exact)
Type 50Cc:
Air-cooled, 4-stroke, SOHC (Single Overhead Camshaft), 2-valve, single-cylinder
Type 100Cc:
Air-cooled, 4-stroke, SOHC (Single Overhead Camshaft), 2-valve, single-cylinder
Displacement 50Cc:
Approximately 49.4 cc
Displacement 100Cc:
Approximately 98.1 cc
Bore Stroke 50Cc:
e.g., 39.0mm x 41.4mm (check manual for exact)
Bore Stroke 100Cc:
e.g., 50.0mm x 49.5mm (check manual for exact)
Compression Ratio 50Cc:
e.g., 10.5:1 (check manual for exact)
Compression Ratio 100Cc:
e.g., 10.5:1 (check manual for exact)
Max Power 50Cc:
Typically around 3-4 HP (check manual for exact figures specific to year/emission standards)
Max Power 100Cc:
Typically around 6-8 HP (check manual for exact figures specific to year/emission standards)
Fuel Delivery 50Cc:
Carburetor (e.g., Keihin PD22 or similar, check manual for exact)
Fuel Delivery 100Cc:
Carburetor or EFI (Electronic Fuel Injection) depending on model year and market (check manual for exact)
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
Approximately 4.6 Liters (check manual for exact)
Length:
Approx. 1715 mm (check manual for exact)
Width:
Approx. 690 mm (check manual for exact)
Height:
Approx. 1050 mm (check manual for exact)
Wheelbase:
Approx. 1240 mm (check manual for exact)
Dry Weight 50Cc:
Approx. 85 kg (check manual for exact)
Dry Weight 100Cc:
Approx. 90 kg (check manual for exact)
Payload Capacity:
Typically rider + passenger, within Gross Vehicle Weight Rating (GVWR) specified in manual.
Front Tire Size:
e.g., 100/90-10 (check manual for exact)
Rear Tire Size:
e.g., 110/90-10 (check manual for exact)
Wheel Type:
Cast aluminum alloy
Crash Test Results:
N/A for scooters in the same manner as automobiles; safety relies on rider skill and vehicle handling characteristics.
Braking System:
Disc brake front, drum brake rear (common configuration, verify with manual).
Lighting:
Halogen headlight, LED tail light and brake lights (depending on model year), turn signals.
Frame Construction:
Underbone steel frame for rigidity and maneuverability.
Suspension Design:
Telescopic front fork, unit swing rear suspension.
Dashboard Features:
Analog speedometer, fuel gauge, indicator lights (turn signals, high beam, oil warning, etc.). Modern versions may include a small LCD display.
ABS:
Anti-lock Braking System (ABS) is typically not standard on 50cc models and may be optional or not available on all 100cc models, depending on market and year.
Charging Port:
Some later models may feature a 12V power outlet or USB charging port in the glove compartment or under the seat.
Oil Change Interval:
Typically every 3,000 km or 6 months (check manual for exact, often depends on operating conditions).
Air Filter Inspection:
Inspect every 3,000 km, clean/replace as needed (check manual).
Spark Plug Replacement:
Recommended replacement every 10,000-15,000 km or inspect at 5,000 km (check manual for specific plug type and gap).
Cv Belt Inspection:
Inspect for wear at 6,000 km, replace as needed (check manual for recommended interval).
Brake Fluid Change:
Recommended every 2 years or as per manual's mileage interval.
Engine Oil Type:
SAE 10W-40 API SG or higher (check manual for exact viscosity and API rating).
Engine Oil Capacity:
Approximately 0.8 - 1.0 Liters (check manual for exact, including filter change if applicable).
Brake Fluid Type:
DOT 3 or DOT 4 (check manual for specific recommendation).
Final Drive Oil Type:
SAE 80W-90 GL-4 hypoid gear oil (check manual for exact).
Final Drive Oil Capacity:
Approximately 100-120 ml (check manual for exact).
Common Wear Items:
CV belt, brake pads, tires, suspension bushings, and spark plugs are common wear items requiring periodic replacement.
Carburetor Cleaning:
Carburetors on older models may require periodic cleaning and adjustment due to ethanol in fuel or infrequent use.
Electrical Connections:
Corrosion or loose connections in the electrical system can lead to intermittent faults, especially in humid climates.
Company Origin:
SYM (Sanyang Motor Co., Ltd.) is a Taiwanese manufacturer founded in 1954, known for motorcycles, scooters, and engines.
Mio Introduction:
The SYM Mio was introduced as a stylish, retro-inspired scooter, targeting a younger demographic and urban commuters.
Engine Updates:
Over its production run, the Mio has seen engine updates to comply with various emission standards (e.g., Euro 3, Euro 4) and potential introduction of fuel injection on later 100cc models.
Manufacturing Locations:
Primarily manufactured in Taiwan by SYM.
