【Tricycle】- Vivian Tian        +86-186-2330-4355      VivianTian86@hotmail.com               【Spare Parts】- Hamble       +86-166-2336-3392        motor4@kainiugroup.com
Piston YBR125
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Piston YBR125

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Piston MODEL YBR125


Product Detail



ModelYBR125
CYL DIA54
TOTAL HIGH38.8
COMP DIST21.8
RING1.0*1.0*2.0
PIN DIA15
PIN LENGTH43

Premium Piston YBR125: High-Performance Engine Part for Motorcycle & Tricycle

Introduction: The Core of Engine Excellence

Why Pistons Are Indispensable in Engine Parts

As a foundational component of engine parts, the piston acts as the "power converter" of motorcycle and tricycle engines, translating the energy from fuel combustion into mechanical motion that drives the vehicle. Its precision, durability, and compatibility directly impact critical performance indicators—including power output, fuel efficiency, and engine lifespan. A substandard piston can lead to sluggish acceleration, increased fuel consumption, and costly breakdowns, while a premium-engineered piston like the YBR125 ensures optimal engine operation, minimizes maintenance needs, and elevates the overall riding experience. For vehicle owners, mechanics, and commercial operators, investing in reliable motorcycle parts and tricycle parts such as the YBR125 piston is essential for long-term performance and cost-effectiveness.

Product Overview: Piston YBR125

Designed exclusively for the YBR125 model, this piston is a specialized engine part crafted to meet the rigorous demands of modern two-wheel and three-wheel vehicles. Combining advanced CNC machining technology, high-grade materials, and exacting specifications, the YBR125 piston delivers seamless fitment, exceptional durability, and enhanced performance. Whether you’re replacing a worn piston, upgrading your engine, or maintaining a fleet of vehicles, the YBR125 piston is the ideal choice for motorcycle enthusiasts, daily commuters, and commercial tricycle operators. Below, we detail its key specifications, design advantages, and versatile applications to help you make an informed purchasing decision.

Key Specifications of Piston YBR125: Precision Engineered for Perfection

Model Specificity: YBR125

The piston is tailor-made for the YBR125 model, ensuring 100% compatibility with the engine’s original design parameters. Unlike generic engine parts that require modifications or compromise fitment, the YBR125 piston is engineered to match the exact dimensions and performance requirements of YBR125 engines. This specificity eliminates installation hassles, reduces downtime, and guarantees that your engine operates at its factory-calibrated peak. Whether you’re servicing a personal motorcycle or a commercial tricycle, the YBR125 piston is a reliable, drop-in solution for your engine parts needs.

Critical Dimensions for Optimal Function

Every dimension of the YBR125 piston is calibrated with meticulous precision to meet industry-leading standards, ensuring uncompromising performance:
  • CYL DIA (Cylinder Diameter): 54mm – Ensures a tight, leak-proof seal with the cylinder wall, maximizing combustion efficiency and minimizing power loss.

  • TOTAL HIGH (Total Height): 38.8mm – Optimizes vertical movement within the cylinder, balancing mechanical stress and power delivery for smooth, consistent operation even under heavy loads.

  • COMP DIST (Compression Distance): 21.8mm – Fine-tunes the engine’s compression ratio, enhancing torque production and fuel combustion efficiency for responsive acceleration.

  • Piston Ring Specifications: 1.01.02.0mm – A triple-ring configuration (two compression rings + one oil control ring) delivers superior sealing, reduces oil consumption, and prevents carbon buildup.

  • PIN DIA (Piston Pin Diameter): 15mm – Provides robust support for the piston pin, ensuring stable power transmission to the connecting rod even in high-stress scenarios.

  • PIN LENGTH (Piston Pin Length): 43mm – Offers an optimal contact area with the connecting rod, distributing load evenly to minimize wear and extend the piston’s service life.

Superior Quality Materials: Built to Endure

High-Grade Material Composition

The YBR125 piston is forged from aerospace-grade aluminum alloy, selected for its exceptional combination of lightweight, heat resistance, and mechanical durability. This material can withstand extreme temperatures (up to 380°C) and high combustion pressures, preventing deformation and ensuring long-term reliability. Additionally, the piston surface features a hard-anodized coating that enhances wear resistance, reduces friction by up to 20%, and improves heat dissipation—critical for maintaining performance in harsh riding conditions such as long journeys, heavy cargo loads, or hot climates.

Benefits of Premium Materials

The use of top-tier materials translates to tangible advantages for users:
  • Extended Lifespan: Resists corrosion, deformation, and wear, reducing replacement frequency and long-term maintenance costs.

  • Enhanced Heat Management: Efficiently dissipates heat to prevent engine overheating, a common cause of premature engine failure.

  • Consistent Performance: Maintains structural integrity and dimensional precision over time, ensuring stable power output and fuel efficiency.

Wide Application Range: Versatile Performance for Multiple Vehicles

Motorcycle Applications

The YBR125 piston is perfectly suited for YBR125 model motorcycles, including commuter bikes, off-road motorcycles, and light-duty utility bikes. It enhances performance in various scenarios—from stop-and-go urban commutes to rugged off-road adventures—delivering smooth power, improved fuel efficiency, and reduced engine noise. For motorcycle enthusiasts and casual riders alike, the YBR125 piston ensures your bike operates at its peak potential, whether you’re chasing speed or navigating daily routes.

Tricycle Applications

For tricycles equipped with the YBR125 engine, the YBR125 piston is a rugged, reliable choice for passenger and cargo transportation. Tricycles often face heavy loads, rough terrain, and frequent use, but the YBR125 piston’s durability and load-bearing capacity ensure stable performance. It maintains consistent power output even when carrying maximum loads (up to 500kg), making it ideal for commercial use in urban and rural areas. Whether you’re transporting goods, passengers, or both, the YBR125 piston is built to handle the demands of tricycle operation.

Compatibility with Other Engine Parts: Seamless Integration

Perfect Match with Piston Ring

The YBR125 piston is engineered to work seamlessly with its  piston ring set (1.0*1.0*2.0mm). The piston’s ring grooves are precision-machined to match the ring dimensions, ensuring a tight seal and optimal performance. The piston ring’s high-carbon steel construction with nitride coating complements the piston’s aluminum alloy, creating a durable, low-friction pairing that prevents gas leakage and oil consumption. This compatibility ensures that the entire piston assembly operates as a unified system, maximizing engine efficiency and reliability.

Compatibility with Other Engine Components

Beyond the piston ring, the YBR125 piston is fully compatible with other original equipment (OE) engine parts of YBR125 models, including the connecting rod, cylinder head, and crankshaft. Its precise dimensions and design ensure that it integrates seamlessly with these components, eliminating the need for modifications or adjustments. This compatibility makes the YBR125 piston an ideal replacement part 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
【Spare Parts】 -Hamble
 Email: motor4@kainiugroup.com
 WhatsApp: +86-152-2358-9673
Tel: +86-166-2336-3392
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Area B, Luohuang Industrial Park,Jiangjin District, Chongqing, China
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