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Engines and Components› Cylinder Heads and Components

Athena

Athena 01-08 KTM SX 65 Complete Big Bore Cylinder Kit

$807.95 $643.42 Save $164.53

SKU: A0EF P400270100002

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In Stock
Ships by Jun 10
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Athena P400270100002 is an 80cc Big Bore Cylinder Kit. It includes an aluminum cylinder with nickel-carbide coating, an aluminum cylinder head with a removable bronze dome, high-performance anodized power valves (not OEM compatible), an Athena top-end gasket set, and a cast lite flat-top piston kit. It is designed to increase displacement from 65cc to approximately 80cc for competition and high-performance builds.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandAthena
Part NumberA0EF P400270100002

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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