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56.5mm Piston Assembly Kit for CG125 125cc Vertical Engine
56.5mm Piston Assembly Kit for CG125 125cc Vertical Engine
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Product Overview
This premium 56.5mm Piston Assembly Kit is a professional-grade replacement for the classic CG125 vertical engine. Specifically engineered for Lifan, Zongshen, and other "Honda-clone" 125cc pushrod engines, it provides superior durability and thermal stability to restore your motorcycle or ATV to its peak operating condition.
Product Compatibility
Optimized for the 125cc 4-stroke vertical engine platform, commonly used in street motorcycles and utility ATVs.
| Vehicle Type | Common Compatible Brands & Models |
| Motorcycle | CG125 Style Street Bikes, Cafe Racers, Off-Road Models |
| ATV / Quad | TaoTao, Buyang, Coolsport, Lifan, Zongshen (125cc Vertical Models) |
| Engine Series | CG125 / 156FMI / 157FMI (Pushrod/OHV Vertical) |
| Engine Platform | Lifan, Zongshen, Loncin, Shineray 125cc Vertical Engines |
Specifications
| Component | Metric Measurement | Imperial Measurement |
| Piston Diameter | 56.5mm | 2.22" |
| Wrist Pin Diameter | 15mm | 0.59" |
| Wrist Pin Length | 47mm | 1.85" |
| Engine Type | 4-Stroke Vertical (OHV) | -- |
| Material | High-Grade Heat-Resistant Alloy | -- |
Key Features
- Engineered for Vertical Engines: Specifically designed for the thermal and structural demands of CG125 vertical (pushrod) engine architectures.
- Enhanced Heat Dissipation: Features an advanced structural design that optimizes cooling surface area, ensuring reliable performance during long-distance rides.
- Precision Pushrod Compatibility: Balanced and machined to interact perfectly with standard CG125 cylinder heads and valvetrains.
- Superior Durability: Constructed from high-toughness, corrosion-resistant alloy to prevent rust and withstand mechanical stress at high RPMs.
- Complete Rebuild Package: Includes the 56.5mm piston, 15mm wrist pin, compression and oil rings, and circlips for a fast and efficient engine refresh.
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Fitment FAQ
Will this part fit my specific model and year?
This cylinder piston kit is intended for Optimized for the 125cc 4-stroke vertical engine platform, commonly used in street motorcycles and utility ATVs.; Vehicle Type; Common Compatible Brands & Models; Motorcycle; CG125 Style Street Bikes, Cafe Racers, Off-Road Models; ATV / Quad; TaoTao, Buyang, Coolsport, Lifan, Zongshen (125cc Vertical Models). Key physical/spec details from the product data include Piston Diameter: 56.5mm, Wrist Pin Diameter: 15mm, Wrist Pin Length: 47mm. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. If your original part has a stamped OEM or manufacturer number, match that number first before ordering. For this cylinder piston kit, also compare the bore diameter, piston-pin size, gasket pattern, stud spacing, engine code, stroke type, and cylinder height. This is especially important for Lifan/TaoTao CG125 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this cylinder piston kit for machines outside the listed compatibility, or for units with different bore sizes, piston-pin diameters, stroke lengths, stud spacing, or gasket patterns. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the bore diameter, piston-pin size, gasket pattern, stud spacing, engine code, stroke type, and cylinder height. Recheck listed specs such as Piston Diameter: 56.5mm, Wrist Pin Diameter: 15mm, Wrist Pin Length: 47mm. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.