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Engines and Components› Pistons and Piston Rings

Athena

Athena 05-21 Yamaha YZ 125 LC 144cc 58mm Replacement Power Exhaust Valve

$252.95 $211.75 Save $41.20

SKU: A0EF S410485303018

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In Stock
Ships by Aug 5
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: S410485303018

Kits include aluminum cylinder with galvanic coating design with forged piston with molybdenum coating.

MIA's Description

This power valve is designed to enhance engine efficiency and power delivery. It helps regulate exhaust flow and improve throttle response, resulting in more consistent power output and smoother acceleration. Crafted with precision from high-quality materials to meet OEM standards, ensuring a seamless fit and durability. It is a perfect replacement for the original component and offers high reliability and performance. It is specifically designed for use with Athena big bore cylinder kits.

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 S410485303018

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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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