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54mm Piston Replacement Kit for 125cc 4-Stroke Horizontal Engine
54mm Piston Replacement Kit for 125cc 4-Stroke Horizontal Engine
4.5 / 5.0
(2) 2 total reviews
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Product Overview
This high-precision 54mm Piston Kit is the professional choice for restoring power to your 125cc horizontal engine. Designed for top-tier durability, it features a 14mm wrist pin configuration, making it a direct fit for most performance-oriented Chinese Pit Bikes and ATVs.
Product Compatibility
Optimized for 125cc "Honda-clone" horizontal engines (typically featuring a 4-speed manual or semi-auto transmission).
| Vehicle Type | Common Compatible Brands & Models |
| Dirt Bike / Pit Bike | SSR 125, Apollo 125, Piranha, Pitster Pro, Thumpstar |
| ATV / Quad | TaoTao, Baja, Kazuma, Sunl, Coolster, Jetmoto (125cc Models) |
| Engine Series | 154FMI / 125cc Horizontal Engines |
| Fitment Note | Fits Horizontal engines ONLY; NOT for 125cc Vertical engines |
Specifications
| Component | Metric Measurement | Imperial Measurement |
| Piston Diameter | 54mm | 2.12" |
| Wrist Pin Diameter | 14mm | 0.55" |
| Wrist Pin Length | 41mm | 1.61" |
| Engine Type | 4-Stroke Horizontal | -- |
| Material | Premium High-Grade Aluminum Alloy | -- |
Key Features
- Heavy-Duty Aluminum Construction: Cast from high-grade aluminum alloy to ensure maximum durability and resistance to thermal expansion under racing conditions.
- Precision Gas Sealing: Includes a full set of high-tension rings designed to minimize blow-by and recover lost engine compression.
- Optimized for 125cc Performance: Specifically weighted and balanced for horizontal engine crankcases to reduce vibration and improve throttle response.
- Superior Wear Resistance: The piston surface and rings are engineered to withstand the friction of high-RPM operation, extending the life of your cylinder.
- Standard OEM Dimensions: Manufactured to exact 54mm/14mm specifications for a seamless replacement without the need for engine modifications.
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Fitment FAQ
Will this part fit my specific model and year?
This cylinder piston kit is intended for Optimized for 125cc "Honda-clone" horizontal engines (typically featuring a 4-speed manual or semi-auto transmission).; Vehicle Type; Common Compatible Brands & Models; Dirt Bike / Pit Bike; SSR 125, Apollo 125, Piranha, Pitster Pro, Thumpstar; ATV / Quad; TaoTao, Baja, Kazuma, Sunl, Coolster, Jetmoto (125cc Models). Key physical/spec details from the product data include Piston Diameter: 54mm, Wrist Pin Diameter: 14mm, Wrist Pin Length: 41mm. 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 Honda/Baja/TaoTao 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: 54mm, Wrist Pin Diameter: 14mm, Wrist Pin Length: 41mm. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.
OE quality
Me sirvió para madass 125