Engines and Components Pistons and Piston Rings

JE Pistons

JE Pistons KTM 250SX-F PRO SERIES 14.5 Piston Single

$299.99

SKU: J001 366506S

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Description

In this box, you get a single JE Pistons Pro Series forged piston designed for the KTM 250SX-F. This piston features a 14.5:1 compression ratio, which is a notable increase over stock, aiming to boost performance for riders who want more power from their engine. JE Pistons is a well-known name in high-performance engine components, and this Pro Series piston is built to handle the demands of racing and aggressive riding. Forged pistons like this one are stronger and more durable than cast pistons, making them a solid choice for rebuilding or upgrading your engine. The higher compression ratio means you'll likely see improved throttle response and more power, especially at higher RPMs. Keep in mind that a higher compression ratio may require the use of higher octane fuel to prevent knocking or pinging. This piston is intended for single-cylinder applications and is a direct replacement part for those looking to enhance their KTM's engine.

Fitment

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Specifications

BrandJE Pistons
Part NumberJ001 366506S

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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