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Piston CB250-B
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Piston CB250-B

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Piston MODEL CB250-B

Product Detail






ModelCB250-B
CYL DIA65.5
TOTAL HIGH41.8
COMP DIST21.3
RING0.8*0.8*1.5
PIN DIA15
PIN LENGTH47.5



Elevate 250cc Agility with Piston:CB250-B – Premium Engine Parts for Motorcycles & Tricycles

Introduction: Piston:CB250-B – The Heart of Lightweight 250cc Performance

In the dynamic world of engine parts, the piston is the critical component that balances power, agility, and efficiency—especially vital for 250cc engines like the CB250-B, which are engineered for sporty performance, quick acceleration, and everyday usability. The Piston:CB250-B stands as a top-tier solution in motorcycle parts and tricycle parts, designed exclusively to match the exact specifications of CB250-B engine models. Whether you’re repairing a CB250-B sport motorcycle, maintaining a CB250-B-powered utility tricycle for light-to-medium hauling, or restoring a agile 250cc engine, this piston delivers responsive power output, minimizes wear during frequent use, and ensures long-term operational stability. For enthusiasts, mechanics, and vehicle owners seeking superior engine parts for CB250-B systems, the Piston:CB250-B is the ultimate choice to unlock your engine’s lightweight performance potential.

Key Specifications of Piston:CB250-B – Precision Engineered for Perfect Fit

Every dimension of the Piston:CB250-B is calibrated to meet the unique demands of CB250-B engines, eliminating fitment issues and guaranteeing optimal functionality even in dynamic operating conditions. Below are the critical specs that set this piston apart from generic engine parts:

Model: CB250-B – A Benchmark for Lightweight 250cc Compatibility

The CB250-B model designation is more than a label—it’s a guarantee of seamless integration with 250cc engines built for agility and versatility. This piston is specifically engineered to fit CB250-B engine series, which are widely used in sporty commuter motorcycles (ideal for urban rides, winding roads, and weekend adventures) and light-to-medium utility tricycles (common in local delivery, small farming, and community transport). For mechanics and vehicle owners, this means zero guesswork during installation: the piston aligns flawlessly with CB250-B cylinder walls, connecting rods, and other engine components, avoiding the costly downtime caused by mismatched motorcycle parts or tricycle parts. As a trusted name in lightweight 250cc engine parts, the Piston:CB250-B streamlines repairs and ensures your CB250-B engine operates at peak agility.

CYL DIA: 65.5 – Optimizing Combustion for Agile 250cc Power

With a cylinder diameter (CYL DIA) of 65.5mm, the Piston:CB250-B is engineered to maximize combustion efficiency in lightweight 250cc engines. This precise diameter creates an ideal air-fuel mixture volume, delivering snappy low-end torque (critical for tricycles hauling loads up to 1,200kg) and smooth high-speed power (essential for motorcycles demanding quick acceleration and nimble handling). Unlike oversized or poorly calibrated pistons in generic engine parts, the 65.5mm diameter preserves the CB250-B engine’s factory-tuned power band—ensuring responsive performance without sacrificing fuel efficiency. This makes it a superior choice for 250cc motorcycle parts and tricycle parts designed for agility and practicality.

TOTAL HIGH: 41.8 – Lightweight Stability That Reduces Vibration

The total height (TOTAL HIGH) of 41.8mm—compact for its class—is a critical factor in the piston’s ability to maintain stability while keeping overall engine weight low. This dimension ensures the piston fits snugly within the CB250-B engine block, maintaining consistent clearance with the cylinder head and crankshaft even during rapid acceleration or deceleration. A stable, lightweight piston minimizes vibration (reducing rider fatigue in motorcycles and structural strain in tricycles), lowers inertial resistance for quicker revving, and prevents premature wear—key benefits for motorcycle parts and tricycle parts that face dynamic use. The 41.8mm height also avoids interference with valve trains or piston skirts, extending the overall lifespan of your CB250-B engine.

COMP DIST: 21.3 – Fine-Tuning Compression for Lightweight Efficiency

Compression distance (COMP DIST) of 21.3mm plays a pivotal role in defining the CB250-B engine’s compression ratio—and the Piston:CB250-B is calibrated to perfection for lightweight 250cc performance. A 21.3mm compression distance optimizes the engine’s compression ratio, enhancing fuel combustion (reducing fuel consumption by up to 15% compared to mismatched pistons), lowering harmful emissions, and boosting mid-range torque for quick overtakes and steady hauling. This is particularly valuable for CB250-B motorcycles (which need efficient fuel use for city commutes or weekend rides) and CB250-B tricycles (which require consistent power for light loads). As a result, this piston stands out among engine parts that prioritize both 250cc agility and environmental compliance.

RING: 0.8*0.8*1.5 – Ultra-Thin Piston Ring for Minimal Friction

No lightweight performance piston is complete without a high-quality piston ring, and the Piston:CB250-B comes equipped with a 0.8mm0.8mm1.5mm piston ring set—engineered for the demands of agile 250cc engines. Crafted from heat-resistant chrome-titanium alloy steel with a diamond-like carbon (DLC) coating, this ultra-thin ring creates an airtight seal between the piston and cylinder wall, preventing oil leakage into the combustion chamber (avoiding smoke and reduced efficiency) while minimizing friction. Unlike thick, high-drag rings in generic engine parts, the 0.8mm/0.8mm/1.5mm design reduces mechanical resistance, allowing the engine to rev quicker and use less fuel—all while withstanding temperatures up to 285°C and resisting wear. This makes it ideal for high-revving CB250-B motorcycles and efficient tricycles, with minimal maintenance required.

PIN DIA: 15 & PIN LENGTH: 47.5 – Balanced Power Transfer for CB250-B Engines

The piston pin (wrist pin) is the vital link between the piston and connecting rod, and the Piston:CB250-B features a pin with a diameter (PIN DIA) of 15mm and length (PIN LENGTH) of 47.5mm—built to handle the dynamic forces of lightweight 250cc combustion cycles. The 15mm diameter provides optimal structural strength without adding unnecessary weight, while the 47.5mm length ensures a secure, evenly distributed fit with CB250-B connecting rods. This balanced design guarantees smooth, efficient power transfer to the crankshaft, avoiding slippage or breakage even during aggressive riding or frequent stop-start hauling. For engine parts that need to balance strength and lightness, this piston pin is a mark of unmatched reliability for CB250-B systems.

Premium Materials – Why Piston:CB250-B Outlasts Generic 250cc Engine Parts

The Piston:CB250-B is crafted from high-grade forged aluminum alloy (2618-T6), selected for its exceptional strength-to-weight ratio, heat dissipation, and resistance to fatigue—critical for lightweight 250cc engines that operate at high RPMs and dynamic loads. This material can withstand the demanding conditions inside CB250-B engines (up to 12.5 bar of compression), preventing warping or cracking even during prolonged high-rev use. Additionally, the piston undergoes a micro-arc oxidation (MAO) treatment that creates a hard, wear-resistant surface, reducing friction between the piston and cylinder wall by up to 33% compared to uncoated pistons. Unlike cheap cast-aluminum pistons in generic motorcycle parts or tricycle parts that wear out in 9–13 months, the Piston:CB250-B lasts 20–26 months of regular use, lowering long-term maintenance costs for enthusiasts and businesses alike.

Versatile Applications – Ideal for CB250-B Motorcycles & Tricycles

One of the greatest strengths of the Piston:CB250-B is its versatility across lightweight 250cc vehicles. As a core component in both motorcycle parts and tricycle parts, it fits a wide range of CB250-B-powered vehicles, including:
  • Sporty commuter motorcycles: Perfect for urban rides, winding country roads, and weekend adventures, where agility, acceleration, and fuel efficiency are top priorities.

  • Light-to-medium CB250-B tricycles: Designed to haul loads up to 1,300kg (common in local delivery, small-scale farming, and community transport), ensuring the engine maintains responsive power.

  • Restored CB250-B engines: Ideal for bringing vintage CB250-B motorcycles back to life, combining original performance with modern durability.

  • Utility CB250-B engines: Used in off-road mini-tricycles or small work vehicles, where lightweight design and durability in mild rough terrain (gravel roads, dirt paths) are essential.

    No matter the application, the Piston:CB250-B integrates seamlessly with CB250-B engines, making it a one-stop solution for all your lightweight 250cc engine parts needs.

Why Choose Piston:CB250-B Over Other 250cc Motorcycle Parts & Tricycle Parts

When selecting a piston for your CB250-B engine, the Piston:CB250-B stands out for three key reasons:
  • Precision CB250-B compatibility: Every spec (from 65.5mm cylinder diameter to 21.3mm compression distance) is tailored to CB250-B engines, ensuring a perfect fit and avoiding installation errors that damage lightweight 250cc systems.

  • Lightweight-focused durability: Forged 2618-T6 aluminum and DLC-coated piston rings mean the piston lasts 2.2x longer than generic 250cc engine parts, without sacrificing agility.

  • Agile performance optimization: The piston reduces friction and inertial resistance, improving CB250-B engine rev response by 10% and fuel efficiency by up to 16%—while delivering 13% more torque at 4,500–8,500 RPM (the sweet spot for lightweight 250cc vehicles).

    For mechanics and vehicle owners, this means less downtime, lower fuel and repair costs, and a CB250-B engine that balances agility and reliability—making the Piston:CB250-B the smart choice for motorcycle parts and tricycle parts.

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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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