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  • Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine
  • Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine
  • Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine
  • Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine
Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine

Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine

  • >= 2 Pieces
    $144
View product details

Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • High-Performance 125cc 4-Stroke Engine: Designed to deliver smooth power output and fuel efficiency, ideal for motorcycles requiring reliable performance across diverse riding conditions.
  • Dual Cooling System: Combines air and water cooling technologies to ensure optimal thermal management, enhancing durability and longevity under heavy use.

Key features

  • 1. Durable Steel Construction with Lightweight Aluminum Components

    • Material Technology

  • 2. Convenient Electric Start System

    • Interactive Design

  • 3. Efficient 125cc 4-Stroke Performance

    • Performance Parameters

  • 4. Versatile Adaptability for Multiple Riding Styles

    • Scenario Solutions

  • 5. Built to Meet Industry Safety Standards

    • Certification Standards

Product details

Factory Direct 125 Cc 4 Stroke Air Cooled Water Cooled Motorcycle Engine Assembly 125cc Engine

The Factory Direct 125cc 4-Stroke Motorcycle Engine Assembly combines robust steel construction with lightweight aluminum components to deliver reliable performance. Designed for versatility, this engine supports both air-cooled and water-cooled configurations, making it adaptable for diverse riding conditions. Its sleek, modern design and modular architecture enable easy customization for enhanced power, fuel efficiency, or specialized applications.

Technical specifications

FeatureSpecificationBenefit
MaterialSteel (frame/components) + Aluminum alloy (casing/valve cover)Combines durability with reduced weight for optimal power-to-weight ratio.
Cooling SystemAir-cooled (with fins for enhanced heat dissipation) or water-cooled optionMaintains stable performance in extreme temperatures and high-demand scenarios.
Engine Type4-stroke, 125cc displacementEnsures smooth operation, low emissions, and superior fuel efficiency.
DesignCompact, streamlined shape with polished aluminum finishReduces drag and enhances aesthetic appeal for custom builds.
Electrical SystemIntegrated electric start systemSimplifies ignition and improves user convenience.

Customization guide

Adjustable parameters such as cylinder head fin design, piston compression ratio, and camshaft timing allow customization to meet specific needs. For instance:

  • Performance Tuning: Increase compression ratio for higher power output in racing applications.
  • Weight Reduction: Opt for full aluminum components to lighten the engine for off-road bikes.
  • Cooling Adaptation: Switch between air/water cooling to suit environmental conditions.

Get inspired

Whether you’re building a sporty commuter, a rugged off-road machine, or a retro-style cruiser, this engine’s adaptable design and modular components let you tailor performance to your vision.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Power Output (HP)12 HP14 HP (+16.7%)15 HP (+25%)*
Torque (Nm)10.5 Nm12 Nm (+14%)13.5 Nm (+28.6%)
Fuel Efficiency50 km/l55 km/l (+10%)60 km/l (+20%)
Cooling SystemAir-cooledHybrid air/water-cooledFull water-cooled
Weight (kg)65 kg62 kg (-4.6%)58 kg (-10.8%)

Supplier's note

  1. Technical Breakthroughs:

    • Hybrid Cooling Option: The Advanced/Pro models’ dual cooling capability reduces thermal stress by 20% compared to traditional air-cooled engines.
    • Lightweight Aluminum Casing: Reduces overall engine weight by 15% versus steel-only designs, enhancing agility.
    • Modular Design: Allows seamless integration of aftermarket parts, expanding customization potential by 30%.

  2. Optimal Version Selection:

    • Base Model: Ideal for casual riders prioritizing cost-efficiency and simplicity. Its 12 HP and air-cooled system suit urban commuting and light touring.
    • Advanced Model: Targets sport-oriented users needing hybrid cooling for track days and long-distance rides. The 14 HP boost and 55 km/l efficiency balance power and practicality.
    • Pro Model: Designed for off-road and high-performance builds. Its full water-cooling and 15 HP output ensure reliability in extreme conditions, while reduced weight improves handling.

Pro Model’s power output exceeds industry benchmarks by 25%, enabling faster acceleration and sustained high RPM performance.

Frequently asked questions

  • Which 125cc motorcycle engine is best suited for lightweight scooters or small bikes?

  • How do I maintain the aluminum valve cover to prevent corrosion?

  • Steel vs Aluminum Engine Casing: Which material offers better durability for daily use?

  • Can this 125cc engine be customized with performance upgrades like high-flow exhausts?

  • Is the Factory Direct 125cc engine emissions-compliant for EU or US standards?

  • Is the 125cc 4-stroke engine suitable for off-road motorcycles?

  • How does the air/water-cooled system in this engine manage heat during prolonged use?

  • Does the 125cc engine assembly come with an electric starter system for easy ignition?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Engine DisplacementUrban commuting, light touring- Industry: 100-150cc (ISO 3833)
- Our Base: 125cc (ISO 3833)
- Our Advanced: 150cc (ISO 3833) ▲▲		Base model balances power/fuel efficiency; Advanced offers 20% more power ▲▲Base may underperform in heavy loads; Advanced may reduce fuel efficiency slightly
Material ConstructionOff-road, heavy-duty riding- Industry: Aluminum (EN 10025)
- Our Base: Steel (EN 10025)
- Our Advanced: Steel + Alloy (ASTM A36) ▲		Steel chassis enhances durability; Advanced adds 30% tensile strength ▲Base is 15% heavier; Advanced increases cost by 10%
Cooling SystemLong-distance touring, high-heat zones- Industry: Air-cooled (SAE J1839)
- Our Base: Air-cooled (SAE J1839)
- Our Advanced: Hybrid (SAE J1839+J1086) ▲		Hybrid cooling reduces overheating risks ▲; Maintains performance in extreme heatAdvanced requires 20% more maintenance effort
Power OutputSport riding, hill climbing- Industry: 8-10 HP (ISO 14396)
- Our Base: 9 HP (ISO 14396)
- Our Advanced: 10 HP (ISO 14396) ▲		Advanced improves 0-60 mph acceleration by 15% ▲Base may lag in high-demand scenarios
Fuel EfficiencyDaily commuting, cross-country trips- Industry: 40-50 km/l (ISO 8012)
- Our Base: 45 km/l (ISO 8012)
- Our Advanced: 50 km/l (ISO 8012) ▲▲		Advanced reduces refueling stops by 25% ▲▲Base efficiency is average for its class
Noise LevelUrban areas, noise-sensitive zones- Industry: 80 dB (ISO 3744)
- Our Base: 75 dB (ISO 3744) ▲
- Our Advanced: 70 dB (ISO 3744) ▲▲		Base is 6 dB quieter than standard ▲; Advanced matches electric vehicle noise ▲▲Advanced requires premium sound-dampening materials (cost +15%)

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