Athena 58mm Big Bore Top End Piston Kit for Yamaha YZ125 (2022-2025)

This Athena 58mm big bore top end piston kit is listed for Yamaha YZ125 models from 2022 to 2025 and is intended for a 144cc big bore cylinder setup. Condition is new. It’s suited for riders replacing or upgrading a worn top end using an Athena big bore configuration. What’s included (cylinder, piston, rings, gaskets, and any related hardware) can vary by kit, so check the listing for details. Price shown is $926.96 USD, and shipping is free shipping.

USD 926.96
Condition: see listing
LocationGilbert US
ShippingFree shipping (check listing for details)
Seller azquadparts
99.9% positive · 31116 feedback
ListingFixedPrice · Active
Start time2025-04-10T19:24:13.000Z
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Athena 58mm Big Bore Top End Piston Kit for Yamaha YZ125 (2022-2025) Specs
Non-Domestic ProductNo
Machine TypeOff-road Motorcycle
Items IncludedCylinder Barrel, Gasket Set, Piston Rings, Pistons, Wrist Pins
Custom BundleNo
Manufacturer Part NumberP400485100101
Superseded Part NumberB4X-11311-01-00, B4X-11111-00-00, B4X-11631-00-D0
Vintage PartNo
Modified ItemNo
Placement on Vehicleupper
BrandAthena
Engine Type2-Stroke
TypeEngine Rebuild Kit
Unit TypeUnit
Interchange Part NumberB4X-11311-01-00, B4X-11111-00-00, B4X-11631-00-D0
Manufacturer Warranty1 Year
OE/OEM Part NumberB4X-11311-01-00, B4X-11111-00-00, B4X-11631-00-D0
Surface FinishSilver
FeaturesCorrosion-Resistant, Durable
Country/Region of ManufactureItaly
Unit Quantity1
Performance PartYes
Listing details

Athena 58mm 144cc Big Bore Cylinder Top End Kit!This is the best and most reliable big bore kit on the market!Fits Yamaha YZ125 2 Stroke Dirt Bikes Years 2022 2023 2024 2025Also Fits Yamaha YZ125X Years 2023 2024 2025This kit includes:58mm 144cc Nikasil Athena Big Bore CylinderAthena 58mm Coated Piston Kit (Includes, Piston, Pin, Rings & Clips)Power Valves PairAthena Complete Top End Gasket SetAthena HeadAthena Head Stud KitAll parts come with warranty.We ship worldwide & ship all domestic orders free!