🏷️ Basic Information

Make:

SYM (Sanyang Motor Co., Ltd.)

Model:

Mio

Engine Displacement:

50cc and 100cc

Product Type:

Service Repair Workshop Manual

Applicable Generations:

All Mio generations covered by the manual

Manual Format:

PDF Download

👋 Introduction

Vehicle Segment:

Lightweight, user-friendly scooter popular for urban commuting and short-distance travel.

Target Audience:

Commuters, younger riders, and those seeking an economical and easy-to-operate mode of transport.

Competitors:

Honda Dio, Yamaha Jog, Kymco Agility, Suzuki Address, various other 50cc and 100cc scooters.

Design Philosophy:

Compact, stylish, and practical design with a focus on ease of use and maneuverability.

Performance Characteristics:

Nimble handling, efficient fuel consumption, and adequate power for urban environments.

Manual Value Proposition:

Provides comprehensive DIY repair and maintenance capabilities, saving on dealership service costs.

📋 Manual Details

Manual Type:

Comprehensive Service, Repair, and Workshop Manual

Documentation Scope:

Repair, Maintenance, Rebuilding, Refurbishment, Restoration

Estimated Pages:

Hundreds of pages (specific count not provided, but indicated as extensive)

Primary Language:

English

Digital Format:

Searchable PDF

📖 Manual Coverage

Engine Mechanical:

Engine disassembly, assembly, inspection, tuning, lubrication, cooling system, oil pump, oil filter.

Engine Fuel System:

Carburetor adjustment and overhaul, fuel injection system (if applicable to specific models), fuel filter, fuel pump, fuel tank.

Ignition System:

Spark plugs, ignition coil, CDI unit, wiring diagrams, timing.

Transmission:

CVT (Continuously Variable Transmission) inspection, maintenance, clutch, variator unit, belt replacement, drive and driven pulleys.

Brakes:

Brake system overhaul, hydraulic fluid replacement, brake pad replacement, brake caliper maintenance, brake lever adjustment, drum brake adjustment (rear).

Suspension:

Front fork inspection and service, rear shock absorber maintenance, swingarm inspection.

Electrical System:

Battery maintenance, charging system (stator, regulator/rectifier), starter motor, lighting system (headlight, taillight, turn signals), horn, fuses, wiring diagrams.

Frame And Bodywork:

Chassis inspection, body panel removal and installation, seat, handlebars, footpegs, storage compartment.

Wheels And Tires:

Tire inspection, pressure, replacement, wheel bearing maintenance, rim inspection.

Steering:

Handlebar removal and installation, steering head bearing inspection and adjustment.

Routine Maintenance:

Oil changes, filter replacements, spark plug checks, tire pressure adjustments, brake adjustments, general lubrication.

Troubleshooting:

Diagnostic procedures for common starting issues, engine performance problems, electrical faults, and more.

Overhaul Procedures:

Detailed step-by-step instructions for disassembling and reassembling major vehicle components.

Component Replacement:

Instructions for replacing wear items and faulty parts such as brake pads, belts, bearings, and bulbs.

Electrical Diagnostics:

Guidance on using multimeters, interpreting wiring diagrams, and diagnosing electrical circuit issues.

Settings And Adjustments:

Carburetor idle speed, mixture, brake lever free play, steering head bearing preload.

Diagnostic Capabilities:

Advanced diagnostic information, including potential fault codes and symptom analysis.

Rebuild Specifications:

Detailed specifications for engine and transmission rebuilds, including clearances, torque values, and tolerances.

Special Tools:

Identification of special tools required for specific maintenance and repair procedures.

Wiring Diagrams:

Comprehensive electrical wiring diagrams for all vehicle systems.

Torque Specifications:

Precise torque values for all critical fasteners throughout the vehicle.

📊 Manual Specifications

File Type:

PDF (.pdf)

Readability:

High-resolution digital scans ensuring clear text and diagrams.

Searchability:

Likely includes searchable text for quick information retrieval.

Digital Binding:

N/A (Digital Download)

Digital Paper Quality:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, four-stroke, single-cylinder (typical for Mio models)

Bore X Stroke 50Cc:

Specifics vary by sub-model, but typically around 39.0 mm x 41.4 mm

Bore X Stroke 100Cc:

Specifics vary by sub-model, but typically around 50.0 mm x 49.5 mm

Compression Ratio 50Cc:

Typically around 10.0:1

Compression Ratio 100Cc:

Typically around 9.6:1

Horsepower 50Cc:

Approximately 3.0 - 4.0 HP (depending on specific variant and market regulations)

Horsepower 100Cc:

Approximately 6.0 - 7.0 HP (depending on specific variant and market regulations)

Torque 50Cc:

Typically around 2.5 - 3.0 Nm

Torque 100Cc:

Typically around 6.0 - 7.0 Nm

Fuel Delivery:

Carburetor (Keihin or similar, specific model varies) or Fuel Injection (on later/specific models).

Fuel Type:

Unleaded gasoline

Fuel Tank Capacity:

Approximately 4.0 - 4.5 Liters (varies by model year and variant).

🔧 Transmission

Transmission Type:

Automatic Continuously Variable Transmission (CVT)

Gearbox Options:

N/A (CVT is standard for all Mio models)

Drive System:

Belt drive to rear wheel

Clutch Type:

Centrifugal automatic clutch

📐 Dimensions

Length:

Approximately 1,700 mm - 1,750 mm (varies by model year)

Width:

Approximately 670 mm - 700 mm (varies by model year)

Height:

Approximately 1,000 mm - 1,100 mm (varies by model year)

Curb Weight 50Cc:

Approximately 80 - 90 kg

Curb Weight 100Cc:

Approximately 85 - 95 kg

Max Load Capacity:

Typically around 150-180 kg (rider + cargo)

🛡️ Safety Features

Crash Test Data:

N/A (Scooters of this class typically do not undergo standardized crash testing like automobiles).

Braking System:

Front disc brake, rear drum brake (common configuration). Some variants may have dual disc brakes.

Lighting:

Headlight, taillight, brake light, turn signals for visibility.

💡 Technology Features

Dashboard Features:

Analog or digital speedometer, fuel gauge, turn signal indicators, high-beam indicator, engine warning light.

ABS Availability:

ABS is generally not a standard feature on most Mio 50cc/100cc models, though some higher-spec or later versions might offer it.

Charging Ports:

Some models may feature a 12V power outlet or USB charging port in the under-seat storage area for device charging.

🔧 Maintenance

Engine Oil Change:

Every 3,000-4,000 km or annually (refer to specific model manual for exact interval).

Transmission Oil Change:

Every 6,000-8,000 km or biennially (refer to specific model manual).

Air Filter Cleaning Replacement:

Check every 1,000 km, clean or replace every 2,000-3,000 km.

Spark Plug Replacement:

Every 4,000-6,000 km or as needed based on inspection.

Cvt Belt Inspection Replacement:

Inspect every 5,000 km, replace typically between 15,000-20,000 km or if signs of wear appear.

Engine Oil Type:

SAE 10W-40 API SL or higher (e.g., JASO MA) motorcycle-specific oil.

Engine Oil Capacity:

Approximately 0.7 - 0.8 Liters (including oil filter replacement, refer to manual).

Transmission Oil Type:

SAE 80W-90 API GL-4 or GL-5 gear oil.

Transmission Oil Capacity:

Approximately 100-120 cc (refer to manual for exact capacity).

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid (check reservoir cap).

Common Wear Items:

CVT belt wear, brake pad wear, air filter clogging, carburetor jetting issues (older models), spark plug fouling.

Electrical Issues:

Corroded electrical connectors, failing regulator/rectifier, weak battery.

Importance Of Regular Checks:

Regular checks of tire pressure, brake function, and fluid levels are crucial for safe operation and longevity.

📚 Vehicle History

Manufacturer:

Sanyang Motor Co., Ltd. (SYM) is a Taiwanese manufacturer founded in 1954, known for producing a wide range of motorcycles, scooters, and ATVs.

Sym Mio Development:

The Mio series has been a consistent offering from SYM, evolving over the years with updates to styling, engine technology (transitioning from 2-stroke to 4-stroke in many markets), and features to meet market demands and emissions standards.

Manufacturing Location:

Primarily manufactured in Taiwan, with potential assembly in other global locations.

🏆 Awards & Recognition

Industry Accolades:

While specific awards for the Mio model are not widely publicized, SYM generally receives recognition for its product reliability and value in the scooter market.