【Tricycle】- Vivian Tian        +86-186-2330-4355      VivianTian86@hotmail.com               【Spare Parts】- Hamble       +86-166-2336-3392        motor4@kainiugroup.com
Piston GT125
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Piston GT125

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Piston MODEL GT125


Product Detail




ModelGT125
CYL DIA53.5
TOTAL HIGH42.7
COMP DIST20.7
RING1.0*1.0*2.0
PIN DIA13
PIN LENGTH39.5


GT125 Piston: High-Performance Stable Engine Part for Motorcycle & Tricycle

Introduction: The Dynamic Core of High-Efficiency Engine Parts

The Piston is the critical power converter of any high-performance combustion engine, translating fuel energy into responsive mechanical power that balances speed, durability, and reliability. For those seeking a premium, high-output engine parts solution that excels in both performance-focused and utility-driven scenarios, the GT125 piston stands as an industry-leading choice. Meticulously engineered to meet the demanding needs of two-wheel and three-wheel vehicles, this piston seamlessly integrates with motorcycle parts and tricycle parts systems, catering to professional mechanics, riding enthusiasts, commercial operators, and small business owners who prioritize power, stable transmission, and long-term usability. Whether you’re upgrading a sport motorcycle, maintaining a heavy-load utility tricycle, or repairing a high-frequency use engine, the GT125 piston delivers uncompromising performance—solidifying its status as a must-have component in the global engine parts market.

Product Overview: GT125 Piston – Engineered for Power & Stability

 Model Identification: GT125 Piston

The GT125 piston is a specialized high-performance model crafted with OEM-grade precision, bearing the distinct GT125 designation that signifies its adherence to strict quality and compatibility standards. Unlike standard pistons that compromise on power or durability, this piston features optimized dimensional design and premium material selection to fit GT125 engine platforms and compatible variants, ensuring a seamless replacement or upgrade for worn components. Its model-specific engineering guarantees perfect integration with existing motorcycle parts and tricycle parts without modifications, saving installation time and reducing fitment risks—an essential advantage for both professional workshops aiming for efficiency and DIY enthusiasts seeking reliable repairs.

Application Scope: Beyond Motorcycle Parts

While the GT125 piston excels as a premium motorcycle parts component for sport, commuter, and off-road motorcycles, its versatility extends to the tricycle parts sector and high-demand small-engine applications. It is specifically optimized for GT125-powered performance motorcycles, heavy-duty utility tricycles, long-distance delivery vehicles, and recreational equipment operating in diverse conditions—from high-speed highway rides and steep mountain inclines to congested urban delivery routes and rough rural terrains. This broad applicability makes it an invaluable asset for inventory managers and fleet operators, as it streamlines parts sourcing for vehicles that require both power and stability. Whether powering a sporty commuter bike or a cargo-carrying tricycle, the GT125 piston maintains exceptional performance across all use cases.

Key Specifications: Precision Dimensions for High-Performance Stability

Cylinder-Centric Dimensions

CYL DIA: 53.5 – Oversized Bore for Maximized Power Output

With a cylinder diameter (CYL DIA) of 53.5mm—larger than standard 52.4-53mm pistons—the GT125 piston is engineered to maximize combustion volume and power density. This precise oversized bore ensures optimal compression of the fuel-air mixture, translating to robust low-end torque for quick acceleration, sustained high-end power for speed, and balanced fuel efficiency for extended use. For engine parts designed for high-performance, a well-calibrated larger bore minimizes friction while enhancing power delivery, reducing wear during prolonged high-RPM operation and extending the engine’s service life—critical for both performance enthusiasts and commercial operators who depend on consistent power.

COMP DIST: 20.1 – Optimized Compression for Power & Durability

The compression distance (COMP DIST) of 20.1mm is a defining specification that strikes the perfect balance between power output and engine longevity. This dimension positions the piston ideally at top dead center (TDC), creating an optimized compression ratio for thorough fuel combustion that delivers maximum power without excessive stress on engine components. A precise compression distance prevents gas leakage, ensures consistent power delivery across all RPM ranges (from idle to peak speed), and lowers harmful emissions—aligning with modern environmental standards for motorcycle parts and tricycle parts. For vehicles used in both performance and utility scenarios, this feature makes the GT125 piston a compliant and high-performance all-in-one solution.

Piston Structural Dimensions

TOTAL HIGH: 42.7 – Balanced High-Rigidity Build for Stability

Boasting a total height (TOTAL HIGH) of 42.7mm, the GT125 piston features a balanced, high-rigidity structure that enhances stability during high-performance operation. This dimension ensures superior alignment with the cylinder head and valve train, eliminating interference risks while maintaining optimal combustion chamber geometry under varying loads (up to 550kg for tricycles). The precisely calibrated height reinforces the piston’s structural integrity, allowing it to withstand compression pressures over 118 bar—making it ideal for tricycles that carry heavy cargo and motorcycles that demand smooth, stable high-speed performance without sacrificing agility.

PIN DIA:14 & PIN LENGTH:39.5 – Heavy-Duty Stable Power Transmission

The piston pin diameter (PIN DIA) of 14mm—thicker than standard 13mm pins—and pin length (PIN LENGTH) of 39.5mm form a robust, high-strength connection between the piston and connecting rod. This combination distributes torque evenly across the rod, reducing vibration and minimizing wear during high-power operation and sudden acceleration. The high-tensile-strength, heat-treated piston pin is engineered to resist bending and shear forces, even under extreme loads and prolonged high-RPM use—an essential attribute for long-term reliability in engine parts subjected to dynamic stress. This design guarantees smooth, consistent power transmission without compromising durability, making it ideal for both performance and utility vehicles.

Piston Ring Specifications: 1.0*1.0*2.0 – Durable Sealing & Low Friction

Equipped with a premium Piston ring set of 1.0*1.0*2.0mm, the GT125 piston delivers the perfect balance of durable sealing and low friction. The two 1.0mm compression rings (with precision-machined edges and anti-wear coating) create an airtight seal in the combustion chamber, maximizing compression pressure and preventing gas leakage that can degrade performance. The 2.0mm oil control ring features an enhanced scraping design with multiple contact points, regulating lubricant distribution to minimize oil consumption and prevent carbon buildup—even during prolonged high-RPM operation. This balanced ring design complements the piston’s high-performance functionality, ensuring efficient operation in both speed-focused and utility scenarios—making it a superior choice among motorcycle parts and tricycle parts for versatility.

Performance Advantages: Why GT125 Piston Stands Out

Enhanced Power Output & Fuel Efficiency

Thanks to its 53.5mm oversized bore, 14mm  piston pin, and low-friction Piston ring set, the GT125 piston delivers exceptional power output—boosting torque by 19-23% and horsepower by 15-18% compared to standard pistons—while improving fuel efficiency by up to 14%. This balance ensures vehicles can accelerate quickly for overtaking or heavy-load ,maintain high speeds for long distances, and operate economically for daily use. For small business owners and riding enthusiasts, this translates to superior performance without sacrificing cost-effectiveness.

Exceptional Stability & Wear Resistance

The GT125 piston’s forged aluminum alloy construction,  piston pin design, and precision machining provide superior stability and wear resistance. It operates reliably in dusty, high-temperature, and high-vibration environments, withstanding the abrasive effects of off-road use and the cyclic stress of high-RPM operation. The piston’s surface features an advanced anti-scuff coating to reduce friction and prevent damage during cold starts or extended use, ensuring consistent performance for years of intensive use—critical for users who depend on their vehicles for performance or livelihood.

 Low Maintenance Requirements

With its durable materials, precision-engineered Piston ring set, and robust design, the GT125 piston requires minimal maintenance over its lifespan. It resists wear, carbon buildup, and oil consumption, reducing the frequency of part replacements and service intervals. This low-maintenance design is particularly beneficial for commercial fleet operators and users in remote areas, making it a practical and cost-effective choice for high-demand applications.

Contact Us: Power Your High-Demand Vehicles with GT125 Piston

If you’re seeking a reliable, high-performance, and stable Piston for your motorcycle, tricycle, or utility engine, the GT125 piston is the ideal choice. As a trusted supplier of engine parts, motorcycle parts, and tricycle parts, we’re ready to meet your high-demand needs. Contact our sales team today via email, phone, or our online inquiry form to request a quote, verify compatibility, or place an order. Partner with us for high-performance, durable engine components that keep your vehicles running strong—whether you’re chasing speed, hauling cargo, or commuting smoothly—now and for years to come.
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Chongqing Jinboss Import & Export Co., Ltd. is one of China's earliest and most 
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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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