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Cylinder Works Big Bore Piston Kit 23533A

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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Cylinder Works Big Bore Piston Kit 23533A

Cylinder Works Replacement Piston Kits are purpose-built for machines running Big Bore Cylinder Kits from Cylinder Works. Piston Kits include an all new - not remanufactured - forged aluminum Vertex piston(s) as originally included in all Cylinder Works Big Bore Kits. Pistons are constructed from the highest quality 2618 aluminum alloy with full molybdenum disulphite skirts. Vertex Pistons meet or exceed OEM quality to restore compression, cylinder health and performance. 


  • Includes Vertex forged aluminum piston Part # 23533A
  • Compression Ratio 11.3:1
  • Cylinder Diameter 94 mm
  • Displacement 440 cc
  • Piston Diameter 93.950 mm
  • Size Over Standard: 4.00 mm


  • Replacement piston(s) designed for Cylinder Works Big Bore Kits
  • Piston size and compression matches specs of Cylinder Works Kit
  • Forged 2618 aluminum pistons for superior strength and durability
  • Includes case-hardened wrist pin and piston rings (with nitride or chrome plating)
  • Piston supplied and manufactured by Vertex (Italy)
  • Piston skirts treated to molybdenum disulphite coating for increased piston life, quicker break-in and reduced running noise
  • New, not remanufactured, hardware
  • Piston profile optimized by Vertex to match compression ratio, cylinder design and ring spec for each unique Cylinder Works Cylinder Kit application

Note: Refer to Cylinder Works Big Bore Kit to confirm replacement Vertex Piston part number. Image for reference only. Kit contents vary with application. 

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This product is vehicle specific. Click here to select your vehicle to ensure fitment.

This Product Fits:

Arctic Cat
ATV 400 DVX 2004, 2006, 2007, 2008
KFX400 2003, 2004, 2005, 2006
LT-Z400 QuadSport 2003-2013
Product Style Item # Store SKU Manufacturer Product # Availability
Product Style Cylinder Works Big Bore Piston Kit 23533A Item # 10166248 Store SKU Manufacturer Product # 23533A Availability Out of Stock
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