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Ruian Zhengji Motorcycle Parts Co., Ltd.
Ruian Zhengji Motorcycle Parts Co., Ltd. ABOUT zhenji

Ruian Zhengji Motorcycle Parts Co., Ltd. is a specialized manufacturer engaged in the research, development, production, and sales of pistons for automobiles, motorcycles, and outboard engines

. In addition to offering standard piston products, we focus on the development of motorcycle modification parts and customized products to meet the diverse needs of our customers.

We possess a complete production chain from blank casting to finished piston manufacturing, equipped with over 200 advanced production machines, including more than 80 high-precision CNC lathes. During the piston manufacturing process, we employ both casting and forging techniques to ensure durability and performance. The forging process provides pistons with greater strength and wear resistance, while the casting process offers higher production efficiency and flexibility.

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HOW DID WE START
  • 1999
  • 2003
  • 2008
  • 2012
  • 2018
  • 2023
  • 1999

    Established a piston ring factory and successfully acquired a state-owned entity, inheriting its technical heritage and manufacturing foundation, which laid a solid groundwork for the company's subsequent development.

  • 2003

    The piston company was formally established, focusing on the R&D and manufacturing of motorcycle piston products, mainly serving the domestic after-sales maintenance market.

  • 2008

    Established original equipment manufacturing (OEM) supporting partnerships with renowned domestic motorcycle manufacturers such as Zongshen Group. Simultaneously, it expanded into the garden machinery product line and reached supporting supply agreements with enterprises including Zhongma Group.

  • 2012

    Entered the international market, expanding its business to Southeast Asia, South America, the Middle East, Africa and other regions. It achieved the coordinated development of the domestic after-sales market, export OEM, and original equipment supporting business.

  • 2018

    Further enriched its product portfolio, successfully developing piston products for drone engines and automobile engines, and entering the field of new engine components.

  • 2023

    Launched the R&D and production of forged pistons and marine pistons, continuously promoting process and technological upgrading, expanding the high-end market, and establishing cooperation with more world-renowned brands.

Ruian Zhengji Motorcycle Parts Co., Ltd. Product Categories
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Ruian Zhengji Motorcycle Parts Co., Ltd. Manufacturing Capabilities

We are equipped with advanced production lines covering mold development, casting, CNC machining, surface treatment, and heat treatment. From raw material to finished parts, every step is controlled under a rigorous quality management system.

  • Metalworking Metalworking
  • Metalworking Metalworking
  • Metalworking Metalworking
  • Metalworking Metalworking
  • Metalworking Single-Person Line Metalworking Single-Person Line
  • Metalworking Single-Person Line Metalworking Single-Person Line
  • Casting Casting
  • Casting Casting
  • Casting Casting
  • Casting Casting
  • Casting Casting
  • Included in the inspection Included in the inspection
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
    01 Motorcycles

    The piston is a core component of the engine. It reciprocates in the cylinder, compresses the air-fuel mixture, and drives the crankshaft to rotate with ignition, providing driving power for the motorcycle.

  • Ruian Zhengji Motorcycle Parts Co., Ltd.
    02 Automobile / Car

    The piston reciprocates in the engine cylinder, completing the four-stroke cycle of intake, compression, power, and exhaust. It converts the thermal energy from fuel combustion into mechanical energy to drive the car.

  • Ruian Zhengji Motorcycle Parts Co., Ltd.
    03 Small Engine

    The piston completes energy conversion through reciprocating motion in the cylinder, providing core power for small equipment such as lawnmowers and small generators, adapting to their needs for low power and compact structure.

  • Ruian Zhengji Motorcycle Parts Co., Ltd.
    04 Agricultural Machinery

    The piston is a key component of the engine in agricultural machinery (e.g., small tractors, harvesters). It drives the engine to operate through reciprocating motion, providing power support for agricultural operations like farming and harvesting.

  • Ruian Zhengji Motorcycle Parts Co., Ltd.
    05 General Machinery

    The piston plays a core role in energy conversion. It transmits power to subsequent working components through reciprocating motion in the cylinder, adapting to power needs in multiple scenarios.

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  • Ruian Zhengji Motorcycle Parts Co., Ltd.
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
  • Ruian Zhengji Motorcycle Parts Co., Ltd.
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