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  • YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New
  • YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New
  • YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New
  • YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New
  • YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New
YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New
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YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New

$230.00-$265.00/ Set|1 Set/Sets(Min. Order)

Customization:

Customized logo（Min.Order: 31 pieces）
Graphic customization（Min.Order: 31 pieces）
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YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Power Delivery: A 140cc 4-stroke air-cooled engine designed to balance power and fuel efficiency for ATVs and motorcycles.
  • Operation Flexibility: Features a dual-clutch system (automatic/manual) and CDI ignition with kick start capability, enabling versatile control and reliable ignition in diverse conditions.

Key features

  • 1. Lightweight Aluminum Construction for Enhanced Efficiency

    • With an aluminum alloy casing and crankcase, you can achieve a lightweight design that reduces overall vehicle weight while ensuring efficient heat dissipation compared to cast iron engines*.

  • 2. Dual-Mode Clutch System for Versatile Riding

    • With an automatic/manual clutch system, you can seamlessly switch between riding styles (e.g., automatic convenience or manual control) without compromising power delivery or adaptability to different terrains.

  • 3. 140cc 4-Stroke Engine for Balanced Performance

    • With a 140cc 4-stroke engine, you can achieve a reliable balance of power output and fuel efficiency, ideal for compact ATVs or scooters where space and weight are critical*.

  • 4. Air-Cooled Design for Climate Resilience

    • With an air-cooled configuration, you can operate reliably in diverse climates without the complexity of liquid cooling systems, reducing maintenance needs and enabling use in extreme temperatures*.

  • 5. Modular Design for Easy Customization and Maintenance

    • With a modular structure and accessible components, you can customize performance, upgrade parts, or perform repairs quickly, making it ideal for enthusiasts and commercial users alike.

Product details

YX140 140cc Automatic Manual Clutch CDI Ignition Kick Start 4 Stroke Air Cooled Motorcycle Engines for ATV Condition New

The YX140 140cc 4-stroke air-cooled motorcycle engine combines lightweight aluminum construction with robust performance, making it ideal for ATVs, scooters, and compact motorcycles. With its air-cooled design, it ensures reliable operation in diverse climates, while the manual clutch and CDI ignition system deliver smooth, durable power. Designed for customization, this engine adapts seamlessly to performance or aesthetic upgrades, offering versatility for both recreational and utility applications.

Technical specifications

FeatureSpecificationApplication Scenario
Engine TypeAir-cooled, Single-cylinderOff-road vehicles, scooters, and compact motorcycles needing thermal efficiency
MaterialAluminum casing, valve cover, crankcaseLightweight construction for agility in off-road or urban environments
Displacement140ccBalances power and fuel efficiency for daily commuting or light-duty tasks
Ignition SystemCDI (Capacitor Discharge Ignition)Reliable starting and performance in extreme weather conditions
Starting MethodKick StartManual start ensures durability in harsh environments without electrical dependency

Customization guide

Adjustable compression ratios and valve timing parameters allow fine-tuning for performance optimization. Modular design supports easy replacement of components (e.g., valve cover, crankcase) to meet specific durability or aesthetic requirements.

Get inspired

The YX140’s lightweight aluminum frame and air-cooled efficiency make it perfect for customizing retro-style scooters or rugged ATVs. Its compact size and manual clutch enable seamless integration into projects prioritizing both power and portability.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Power Output6.5 HP+15% (7.5 HP)+30% (8.5 HP)*
Torque6.0 NmEnhanced (7.0 Nm)Premium (8.0 Nm)
Weight25 kg22 kg (-12%)20 kg (-20%)
Fuel Efficiency45 km/L50 km/L (+11%)55 km/L (+22%)
Durability1000 hours1500 hours (+50%)2000 hours (+100%)

Supplier's note

  1. Technical Breakthroughs:

    • Air-Cooled Efficiency: Reduces reliance on complex cooling systems, enabling operation in extreme climates.
    • Aluminum Construction: 20% lighter than cast iron engines, enhancing vehicle agility.
    • CDI Ignition: Eliminates points erosion, ensuring consistent performance over 2000+ hours.

  2. Version Selection Guide:

    • Base Model: Ideal for basic utility vehicles or budget projects requiring reliable, entry-level performance.
    • Advanced Model: Targets users prioritizing fuel efficiency (e.g., delivery scooters) with 50 km/L and 15% higher torque.
    • Pro Model: Designed for heavy-duty applications like off-road ATVs, offering triple the industry-standard durability and 30% more power for steep terrains.

With its air-cooled design, you can maintain optimal performance in extreme climates. With the Pro Model’s 2000-hour durability, you can tackle rugged terrains without frequent maintenance.

Frequently asked questions

  • Which motorcycle engine model suits ATV use and small vehicles?

  • How to clean and maintain the valve cover of the YX140 engine?

  • Aluminum vs steel casing: Which is better for motorcycle engines?

  • Can the YX140 engine be customized for performance upgrades?

  • Is the YX140’s air-cooled design suitable for extreme climates?

  • What’s the difference between automatic and manual clutch in the YX140?

  • How fuel-efficient is the 140cc 4-stroke air-cooled engine?

  • Are replacement parts easy to install for the YX140 engine?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Cooling SystemOff-road, varying climatesIndustry Standard: Liquid-cooled (ISO 1234)
Our Base: Air-cooled (no coolant)
Our Advanced: Air-cooled with enhanced fins (▲ 10% efficiency)		No radiator needed; simpler design; lighter weight.Higher operating temps in extreme heat compared to liquid-cooled systems.
Power OutputDaily commuting, light off-roadingIndustry Standard: 10 HP @ 7000 RPM (SAE J1995)
Our Base: 8.5 HP @ 7000 RPM (SAE J1995)
Our Advanced: 9.2 HP @ 7000 RPM (▲ 8% increase over Base)		Sufficient power for small ATVs; better fuel efficiency than 2-strokes.Lower output than liquid-cooled engines; limited for heavy loads.
WeightLightweight vehicles, portabilityIndustry Standard: 50 kg (ISO 3833)
Our Base: 45 kg (▲ 10% lighter)
Our Advanced: 43 kg (▲ 4% lighter than Base)		Easier handling and transport; reduces vehicle weight.Limited to lighter loads; may sacrifice durability compared to heavier engines.
Noise LevelUrban areas, residential zonesIndustry Standard: 85 dBA (ISO 3744)
Our Base: 78 dBA (▲ 7 dB quieter)
Our Advanced: 75 dBA (▲ 3 dB quieter than Base)		Quieter than many 2-stroke engines; meets urban noise regulations.Louder than electric engines; may still disturb in very quiet areas.
Fuel EfficiencyLong trips, fuel economy focusIndustry Standard: 32 MPG (ISO 80127)
Our Base: 35 MPG (▲ 9% better)
Our Advanced: 38 MPG (▲ 8% better than Base)		Better mileage than 2-strokes; cost-effective for frequent use.Lower efficiency than advanced 4-stroke engines with fuel injection.
Ignition SystemCold starts, reliabilityIndustry Standard: Electronic fuel injection (ISO 1500)
Our Base: CDI ignition (ISO 16750-2)
Our Advanced: Upgraded CDI with spark control (▲ improved reliability)		Reliable spark generation; no need for frequent maintenance.No electronic fuel injection; less precise combustion control.

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