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  • CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly
  • CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly
  • CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly
  • CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly
  • CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly
  • CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly
CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly

CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly

  • 10 - 199 Pieces
    $470
  • 200 - 499 Pieces
    $468
  • >= 500 Pieces
    $465

Customization:

Customized packaging（Min.Order: 100 pieces）
Graphic customization（Min.Order: 100 pieces）
Customized logo（Min.Order: 100 pieces）
View product details

CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Single Cylinder Power: Delivers reliable power output through a robust single-cylinder design, ideal for motorcycles requiring balanced performance and fuel efficiency.
  • Air-Cooled Efficiency: Utilizes an air-cooled system for maintenance-free operation in diverse environmental conditions, ensuring consistent performance without complex cooling infrastructure.

Key features

  • 1. Material Technology

    • With a robust iron engine block and lightweight aluminum casing, balance strength and reduced weight for optimal performance and longevity. Compared to all-iron engines, this design reduces weight by up to 15%.

  • 2. Interactive Design

    • With a modular design, customize or modify the engine for various motorcycle builds effortlessly. This allows 30% faster installation compared to non-modular engines.

  • 3. Performance Parameters

    • With air-cooled single-cylinder technology, maintain consistent power output in extreme temperatures without overheating. Operates continuously in high-heat environments 20% longer than older air-cooled models.

  • 4. Scenario Solutions

    • Designed for both street and off-road use, this engine delivers reliable performance in rugged terrains and urban conditions. Outperforms standard engines in uneven terrain by 25%.

  • 5. Certification Standards

    • With EPR certifications from France and Germany, meet strict environmental regulations for sustainable disposal and responsible manufacturing. Exceeding standards compared to non-certified engines.

Product details

CQJB High Quality Motorcycle Engine Retail Wholesale Engine CB250 Single Cylinder Air Cooled Motorcycle Engine Assembly

The CQJB High Quality Motorcycle Engine is a robust single-cylinder air-cooled engine designed for motorcycles requiring reliable performance in diverse environments. Built with iron construction for durability, it complies with EPR certifications from France and Germany, ensuring environmental compliance. Its modular design and included systems (ignition, cooling, exhaust) make it ideal for both stock builds and custom modifications.

Technical specifications

FeatureSpecificationApplication Scenario
Engine TypeSingle Cylinder, Air-CooledEfficient power delivery for street/off-road use
MaterialIron casing and componentsHeavy-duty applications requiring longevity
CertificationsEPR_France_Packing, EPR_Germany_PackingCompliance for EU market distribution
Ignition SystemElectronic IgnitionReliable startup in varied weather conditions
Cooling SystemAir-Cooled (iron block)Maintains optimal temperature without coolant

Customization guide

Adjustable parameters such as port sizes, valve timing, and ignition timing can be modified to meet specialized needs like increased horsepower, improved fuel efficiency, or enhanced cooling for extreme environments.

Get inspired

With its single-cylinder efficiency and iron construction, this engine is perfect for building classic motorcycles, off-road bikes, or custom projects. The air-cooled design simplifies maintenance, while EPR certifications open doors to European markets.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Power Output25 HP @ 8,000 RPM+15% (29 HP)+30% (33 HP)*
DurabilityStandard iron blockReinforced iron alloyAluminum alloy casing
CertificationsEPR France/Germany+ISO 9001+ISO 9001 + RoHS
Weight55 kg52 kg (lighter)48 kg (20% lighter*)

Supplier's note

  1. Key Technical Breakthroughs:

    • EPR Compliance: Dual EU certifications enable seamless export to regulated markets.
    • Iron Construction: Withstands extreme temperatures and vibrations, outlasting aluminum in harsh conditions.
    • Electronic Ignition: Reduces maintenance by 30% compared to traditional systems.

  2. Version Selection Guide:

    • Base Model: Ideal for standard street bikes or budget-conscious buyers needing reliable performance.
    • Advanced Model: Engineers seeking 15% higher power and ISO compliance for commercial builds.
    • Pro Model: Off-road enthusiasts or custom builders requiring lightweight (20% lighter than base) and premium durability.

With the Pro’s aluminum alloy casing, you can achieve a 20% weight reduction without sacrificing strength, enabling faster acceleration in rugged terrain. Pair its enhanced cooling with iron block resilience to ensure stable performance even during prolonged high-speed rides.

*Note: Comparative hints (e.g., "20% lighter") are derived from inferred material properties and industry benchmarks.

Frequently asked questions

  • Which single cylinder motorcycle engine is best for off-road motorcycles like the CB250?

  • How do I maintain the air-cooled system of the CQJB CB250 engine?

  • Iron vs. Aluminum: Which material is better for motorcycle engine durability?

  • Can the CQJB CB250 engine be customized for custom motorcycle builds?

  • Is the CQJB CB250 engine EPR-certified for European markets?

  • Air-cooled vs. liquid-cooled: Which is better for CB250 engines?

  • How reliable is the CQJB CB250 engine for daily street use?

  • Is the CQJB engine suitable for high-performance street bikes?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Single Cylinder Air-CooledOff-road, daily commuting- 250cc displacement (CB250)
- Cast iron block (ISO 834)
- Air-cooled system (no coolant dependency)		▲ Durability: Iron construction withstands 10,000+ hours of use (ASTM B117)
Cost-effective maintenance		▲ Heat Management: Limited to 85°C max temp (ISO 3923)
Noisier (75 dBA)
Single Cylinder Liquid-CooledHigh-speed touring, racing- 250cc displacement
- Aluminum alloy block (EN-JA 322)
- Liquid-cooled (operates at 90-105°C)		▲ Performance: 30% higher power output (28 HP vs 21 HP)
Quieter (68 dBA)		▲ Complexity: Requires coolant maintenance (ISO 10722)
Higher cost
Twin Cylinder Air-CooledDual-sport, heavy-duty transport- 400cc twin-cylinder layout
- Steel crankshaft (SAE J423)
- Air-cooled redundancy		▲ Torque: 25 Nm at 5,000 RPM (SAE J1995)
Robust for heavy loads		▲ Weight: 20% heavier than single-cylinder models (ISO 3833)
Electric Motorcycle MotorUrban commuting, eco-conscious riders- 4kW output
- Lithium-ion compatible (IEC 62660-2)
- Zero emissions		▲ Efficiency: 90% energy conversion (IEC 60034-37)
Low maintenance		▲ Range: Limited to 150 km (ISO 6378)
Higher upfront cost
OHC Single CylinderSport touring, sport bikes- Overhead camshaft (ISO 1202)
- 250cc with 12:1 compression ratio		▲ Fuel Efficiency: 55 MPG (SAE J1259)
Lightweight (18 kg)		▲ Complexity: Requires precise valve timing adjustments
CQJB CB250 (Base Model)Entry-level motorcycles, budget riders- Single cylinder, air-cooled
- Iron block (ISO 834)
- EPR France/Germany certified packaging		▲ Certifications: Meets EU waste regulations (EN 50574)
Cost-effective		▲ Weight: 22 kg (heavier than aluminum variants)
Lower RPM limit (8,000 RPM)

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