The Piston is the dynamic powerhouse of any combustion engine, translating fuel energy into responsive mechanical motion that defines ride quality. For those seeking high-rev, fuel-efficient engine parts that excel in lightweight and performance-focused vehicles, the CB125 piston stands as an industry-leading choice. Meticulously engineered to meet the precise demands of two-wheel and three-wheel vehicles, this piston seamlessly integrates with motorcycle parts and tricycle parts systems, catering to professional mechanics, riding enthusiasts, daily commuters, and small-scale commercial operators who prioritize agility and efficiency. Whether you’re repairing a sporty commuter motorcycle, maintaining a nimble utility tricycle, or upgrading an engine for better high-RPM performance, the CB125 piston delivers consistent, responsive performance—solidifying its status as a must-have component in the global engine parts market.

The CB125 piston is a specialized high-rev model crafted with OEM-grade precision, bearing the distinct CB125 designation that signifies its adherence to strict quality and compatibility standards. Unlike generic, one-size-fits-all alternatives, this piston is engineered to fit CB125 engine platforms and compatible variants, ensuring a seamless replacement or upgrade for worn components. Its model-specific design 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 and DIY enthusiasts.

While the CB125 piston excels as a premium motorcycle parts component, its versatility extends to the tricycle parts sector and small high-performance engine applications. It is specifically optimized for CB125-powered sport commuter motorcycles, lightweight utility tricycles, and small recreational vehicles operating in diverse conditions—from winding country roads and urban thoroughfares to short-haul delivery routes. This broad applicability makes it an invaluable asset for inventory managers, riding schools, and small business owners, as it caters to both performance and practicality needs. Whether powering a daily rider’s motorcycle or a maneuverable cargo tricycle, the CB125 piston maintains exceptional high-rev stability and fuel efficiency.

With a cylinder diameter (CYL DIA) of 52.4mm, the CB125 piston is engineered to strike the perfect balance between power output and fuel economy. This precise bore size ensures optimal compression of the fuel-air mixture, translating to robust mid-range torque, quick acceleration at high RPMs, and reduced fuel consumption. For engine parts designed for high-rev operation, a well-calibrated cylinder diameter minimizes friction while maximizing combustion efficiency, reducing wear during prolonged high-speed runs and extending the engine’s service life—critical for riding enthusiasts and commercial operators alike.

The compression distance (COMP DIST) of 18.5mm is a defining specification that optimizes high-rev performance. This shorter dimension positions the piston closer to the cylinder head at top dead center (TDC), creating an ideal compression ratio for rapid combustion—perfect for engines that frequently operate at high RPMs. A precise short compression distance prevents gas leakage, boosts power delivery in the upper RPM range, and lowers exhaust emissions—aligning with modern environmental standards for motorcycle parts and tricycle parts. For riders who crave responsive acceleration or commercial vehicles that need quick bursts of power, this feature makes the CB125 piston a standout choice.

Featuring a total height (TOTAL HIGH) of 36.1mm, the CB125 piston boasts a compact, low-profile structure that enhances high-rev stability. This dimension ensures seamless fitment in tight engine bays, eliminates interference with valve trains during rapid reciprocation, and maintains optimal combustion chamber geometry. The streamlined height reduces the piston’s moment of inertia, allowing the engine to rev faster and smoother—making it ideal for motorcycles and tricycles that require agile handling and responsive throttle control.

The piston pin diameter (PIN DIA) of 12mm and pin length (PIN LENGTH) of 33mm form a lightweight yet durable connection between the piston and connecting rod. This compact, low-mass pin design reduces overall piston weight, minimizing reciprocating inertia and enabling faster engine acceleration. The high-strength, heat-treated piston pin is engineered to resist bending and shear forces even at extreme RPMs, while the precise 33mm length ensures a secure fit with connecting rods—an essential attribute for long-term reliability in engine parts subjected to high-rev operation. This design guarantees smooth, efficient power transmission without compromising durability.

Equipped with a premium Piston ring set of 0.80.81.5mm, the CB125 piston delivers exceptional sealing performance with minimal friction. The thin, high-precision compression rings (0.8mm each) create an airtight seal in the combustion chamber, maximizing compression pressure while reducing drag—critical for high-rev efficiency. The 1.5mm oil control ring features a advanced scraping design, regulating lubricant distribution to minimize oil consumption and prevent carbon buildup on the piston crown and cylinder walls. This low-friction ring design complements the piston’s lightweight structure, ensuring efficient operation at high RPMs and extending the engine’s service life—making it a superior choice among motorcycle parts and tricycle parts for performance and durability.

The CB125 piston is crafted from premium forged aluminum alloy, selected for its exceptional strength-to-weight ratio, thermal conductivity, and wear resistance. This material undergoes rigorous heat treatment and stress relieving to withstand the extreme temperatures (up to 340°C) and cyclic stresses of high-rev engine operation—from cold starts to prolonged high-speed runs. Unlike low-quality engine parts, the CB125 piston resists deformation, thermal fatigue, and premature wear, even under aggressive riding conditions, extending the lifespan of both the piston and the entire engine assembly.

Every CB125 piston is manufactured using advanced CNC machining technology, ensuring ultra-tight tolerances (±0.003mm) and consistent dimensions across all units. The precision engineering guarantees that each piston meets or exceeds OEM high-performance standards, eliminating fitment issues and ensuring seamless integration with other motorcycle parts and tricycle parts. From the 52.4mm cylinder diameter to the 12mm piston pin, every specification is calibrated for high-rev performance and reliability, reducing installation time and minimizing downtime for repairs.