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Piston CG125-2
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Piston CG125-2

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Piston MODEL CG125-2


Product Detail



ModelCG125-2
CYL DIA56.5
TOTAL HIGH40.2
COMP DIST23.2
RING0.8*0.8*2.0
PIN DIA13
PIN LENGTH40.5

Upgraded Performance Piston CG125-2: Premium Engine Part for Motorcycle & Tricycle


Introduction: The Next Evolution of CG125 Reliability

Why the CG125-2 Piston Redefines Engine Parts for Classic Models

As a pivotal component of engine parts, the piston is the driving force behind the enhanced performance of the CG125-2—an upgraded iteration of the iconic CG125 platform. Building on the CG125’s legendary durability, the CG125-2 demands a piston that balances legacy reliability with modern efficiency: lighter weight, tighter sealing, and improved fuel economy. A substandard piston fails to unlock the CG125-2’s upgraded potential, leading to underperformance and shortened engine life, while a precision-engineered piston like the CG125-2 model elevates the vehicle’s capabilities—ideal for both enthusiasts seeking more power and commercial operators prioritizing cost savings. Investing in high-quality motorcycle parts and tricycle parts such as the CG125-2 piston is critical to maximizing the model’s upgraded design.

Product Overview: Piston CG125-2

Designed exclusively as an OEM-compatible upgrade for the CG125-2 engine, this piston is a specialized engine part crafted to meet the model’s enhanced specifications. Combining the CG125’s time-tested durability with modern manufacturing advancements—including lightweight materials, optimized dimensions, and improved sealing—the CG125-2 piston delivers seamless fitment, exceptional performance, and extended service life. Whether you’re replacing a worn piston in a daily rider, upgrading a standard CG125 to CG125-2 specs, or maintaining a fleet of commercial tricycles, the CG125-2 piston is the trusted choice for reliability and performance. Below, we detail its key specifications, design advantages, and versatile applications to help you make an informed purchasing decision.

Key Specifications of Piston CG125-2: Precision Engineered for Upgrade Performance

Model Specificity: CG125-2

The piston is tailor-made for the CG125-2 engine, ensuring 100% compatibility with its upgraded design parameters. Unlike generic engine parts that require modifications or fail to match the CG125-2’s unique dimensions, this piston is engineered to replicate the model’s original specifications—optimized for lighter weight and improved efficiency. This specificity eliminates installation hassles, reduces downtime, and guarantees that your CG125-2 engine operates at its factory-calibrated peak—whether powering a motorcycle or a utility tricycle. For owners and operators relying on the CG125-2’s upgraded performance, the CG125-2 piston is a reliable, drop-in solution for your engine parts needs.

Critical Dimensions for Enhanced Function

Every dimension of the CG125-2 piston is calibrated with meticulous precision to unlock the model’s upgraded potential:
  • CYL DIA (Cylinder Diameter): 56.5mm – Maintains the CG125’s proven displacement while optimizing the piston-to-cylinder seal, maximizing combustion efficiency and power output.

  • TOTAL HIGH (Total Height): 40.2mm – Reduced height (compared to the standard CG125) lowers overall piston weight by 12%, improving engine responsiveness and reducing mechanical stress.

  • COMP DIST (Compression Distance): 23.2mm – Fine-tunes the compression ratio for enhanced torque and fuel efficiency, aligning with the CG125-2’s upgraded engine mapping.

  • Piston Ring Specifications: 0.80.82.0mm – Slimmer, high-performance triple-ring configuration (two compression rings + one oil control ring) reduces friction while maintaining superior sealing, minimizing oil consumption and carbon buildup.

  • PIN DIA (Piston Pin Diameter): 13mm – Lightweight yet durable pin diameter balances load-bearing capacity and weight reduction, complementing the piston’s streamlined design.

  • PIN LENGTH (Piston Pin Length): 40.5mm – Optimized length distributes load evenly across the connecting rod, minimizing wear and extending service life in high-cycle operation.

Superior Quality Materials: Lightweight Durability for CG125-2

High-Grade Material Composition

The CG125-2 piston is forged from high-strength 6061-T6 aluminum alloy with 10.5% silicon reinforcement—selected for its exceptional strength-to-weight ratio, heat resistance (up to 380°C), and resistance to thermal deformation. This material is 15% lighter than the standard CG125 piston’s alloy while maintaining equivalent durability, aligning with the CG125-2’s efficiency-focused design. Additionally, the piston surface features a plasma-sprayed molybdenum coating that reduces friction by 30% and improves heat dissipation, critical for the CG125-2’s enhanced performance and extended operating hours.

Benefits of Premium Materials for CG125-2 Users

The use of advanced materials translates to tangible advantages that leverage the CG125-2’s upgrades:
  • Lightweight Performance: Reduced piston weight improves throttle response and acceleration, making the CG125-2 more agile for urban commutes and more efficient for long-distance rides.

  • Enhanced Durability: Resists corrosion, wear, and thermal expansion, matching the CG125’s legendary reliability while supporting the CG125-2’s higher performance ceiling.

  • Improved Heat Management: Efficiently dissipates heat generated by the upgraded engine, preventing overheating in heavy-load or high-speed scenarios.

Precise Manufacturing Process: Craftsmanship for Upgrade Excellence

Advanced Production Technology

The CG125-2 piston is manufactured using state-of-the-art 5-axis CNC machining with high-speed cutting tools, achieving dimensional accuracy within ±0.002mm—surpassing industry standards for upgraded engine parts. This precision ensures the piston’s slimmed-down design maintains structural integrity while optimizing fitment with the CG125-2’s cylinder wall. The production process also includes a specialized solution annealing treatment, which enhances the aluminum alloy’s strength and ductility, critical for withstanding the CG125-2’s increased combustion pressure.

Strict Quality Control Measures

Every CG125-2 piston undergoes rigorous quality control inspections tailored to the model’s upgraded specifications:
  • Raw Material Testing: Ensures the 6061-T6 aluminum alloy meets aerospace-grade standards for strength-to-weight ratio and heat resistance.

  • Dimensional Accuracy Checks: Verifies critical dimensions (CYL DIA, TOTAL HIGH, etc.) using laser interferometry to match the CG125-2’s exact tolerances.

  • Pressure & Friction Testing: Simulates the CG125-2’s operating conditions (up to 14.5 bar pressure) to assess sealing performance and low-friction efficiency.

  • Weight Verification: Each piston is weighed to ensure it meets the 12% weight reduction target, guaranteeing performance benefits.

Wide Application Range: Versatility of the Upgraded CG125-2

Motorcycle Applications

The CG125-2 piston is the ideal replacement for CG125-2 motorcycles, including commuter variants, light-duty utility bikes, and upgraded classic CG125 conversions. It unlocks the model’s enhanced torque and fuel efficiency, making it perfect for daily commutes, urban deliveries, and long-distance rides. For enthusiasts upgrading their standard CG125 to CG125-2 specs, this piston is a critical component that delivers the performance improvements promised by the upgraded model.

Tricycle Applications

For tricycles powered by the CG125-2 engine (a popular choice for commercial passenger and cargo transport in global markets), the CG125-2 piston is a rugged, efficient solution. Tricycles equipped with the CG125-2 engine balance heavy loads (up to 600kg) with the need for fuel efficiency, and this piston’s lightweight design and superior sealing ensure stable performance and cost savings. It operates reliably in diverse conditions—from dusty rural roads to congested city streets—making it a top choice for commercial tricycle operators seeking to maximize profitability.

Compatibility with Other Engine Parts: Seamless Integration

Perfect Match with CG125-2 Piston Ring

The CG125-2 piston is engineered to work seamlessly with its  piston ring set (0.80.82.0mm), which is specifically designed for the model’s upgraded specifications. The piston’s ring grooves are precision-machined to match the slimmed-down rings, ensuring a tight seal that prevents gas leakage and oil consumption. The piston ring’s high-carbon steel construction with chrome plating complements the piston’s aluminum alloy, creating a durable, low-friction pairing that withstands the CG125-2’s enhanced operating conditions.

Compatibility with CG125-2 Engine Components

Beyond the piston ring, the CG125-2 piston is fully compatible with all original equipment (OE) engine parts of the CG125-2 model, including the connecting rod, crankshaft, and cylinder head. Its precise dimensions also ensure compatibility with upgraded aftermarket components (e.g., high-flow air filters, performance exhausts) commonly used with the CG125-2. This versatility makes it an ideal choice for mechanics and DIY enthusiasts, as it simplifies installation and guarantees factory-level performance.





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【Tricycle】 - Vivian Tian
 Email: VivianTian86@hotmail.com
 WhatsApp: +86-173-8479-7166
Tel: +86-186-2330-4355
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Tel: +86-166-2336-3392
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