Please state Size at checkout 
Vertex Top End Kits provide everything you need for a complete top-end rebuild, ensuring precision and performance.
Product Features:
Heat Treated for Durability: All pistons undergo T-5 hardening and a tempering cycle for enhanced strength.
Advanced Forgings: Forged pistons feature new T-box forgings and DLC-coated wrist pins for maximum strength and performance at the highest compression ratios.
Hi-Tech Skirt Coating: Molybdenum disulphide coating on piston skirts ensures faster break-in times and reduced wear.
Nitride Coating: Enhances piston lifespan and reliability.
Exact OEM Replacements: Kits are designed to match original equipment manufacturer specifications for a perfect fit.
KTM Factory-Approved: Replica KTM 2-stroke pistons are factory-supplied to KTM, ensuring top-tier compatibility.
Two-Stroke Piston Kits: Made from gravity-cast aluminium alloy with 18% silicon content, resulting in lightweight yet exceptionally strong pistons.
Included in the Kit:
Piston
Rings
Circlips
Piston pin
Base gaskets
Head O-rings
Wrist pin bearing (where applicable)
Specifications
Manufacturer Item No.
8VTK22584A-28VTK22584B-28VTK22584C-2
Compatibility
This item is compatible with the following vehicle(s):
Make
Model
Year(s)
FANTIC
XX 250
2022, 2023, 2024, 2025
YAMAHA
YZ 250
2024, 2025
YAMAHA
YZ 250 (CG12)
2002
YAMAHA
YZ 250 (CG13)
2003
YAMAHA
YZ 250 (CG17)
2004
YAMAHA
YZ 250 (CG20)
2005
YAMAHA
YZ 250 (CG23)
2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023