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Engines and Components› Pistons and Piston Rings

Athena

Athena 03-07 Kawasaki KLX 400 89.95mm 4T Forged Racing Piston

$247.95 $194.08 Save $53.87

SKU: A0EF S4F09000004B

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Athena S4F09000004B is a forged piston designed as a direct OEM replacement for cylinders with a 89.95 mm diameter. This piston is crafted using advanced forging techniques for superior strength and durability.

The S4F09000004B is constructed from a blend of nickel, silica, and aluminum alloys, offering increased resistance and longevity. Precision engineering ensures a seamless fit and optimal operation within your engine, facilitating a hassle-free installation process.

Fitment

Fitment Guaranteed

Don’t gamble
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 S4F09000004B

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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