What is the compression ratio of this piston?

This JE Pistons single replacement piston features an 11.8 to 1 compression ratio. This is a higher compression ratio than stock, designed to increase engine power and responsiveness.

What makes a forged piston different from a cast piston?

Forged pistons are made by heating and hammering a solid block of aluminum, which creates a denser and stronger grain structure. This makes them more resistant to heat and stress compared to cast pistons, which are made by pouring molten aluminum into a mold.

Can this piston be shipped to California?

No, this piston is not CARB approved and cannot be shipped to California due to emissions regulations.

JE Pistons Forged Piston 323900S - KTM 500 EXC/EX-W

Name: JE Pistons KTM 500 EXC / EX-W 11.8 to 1 Piston Single
Brand: JE Pistons
SKU: je-pistons-je-pistons-ktm-500-exc-ex-w-11-8-to-1-piston-single-t14-695668
Price: 299.99 USD
Availability: BackOrder

JE Pistons KTM 500 EXC / EX-W 11.8 to 1 Piston Single

$299.99

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

JE Pistons KTM 500 EXC / EX-W 11.8 to 1 Piston Single

Key Features

Forged aluminum construction for increased strength and durability.
11.8 to 1 compression ratio for improved engine performance.
Designed for KTM 500 EXC and EX-W models.
Single piston replacement part.

This piston is designed for the KTM 500 EXC and EX-W models. Please verify compatibility with your specific vehicle's engine configuration.

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Product Details

JE Pistons is well-known for making strong internal engine components, and this forged piston for the KTM 500 EXC and EX-W is a prime example. If you're looking to rebuild or upgrade the top end of your KTM's engine, this piston is designed to handle the demands of performance riding. It features an 11.8 to 1 compression ratio, which is a notable bump over stock, giving you more power and responsiveness when you twist the throttle.

This piston is forged, meaning it's made from a solid block of aluminum that's heated and hammered into shape. This process creates a much stronger and more durable part than cast pistons, making it ideal for engines that see regular use or are tuned for increased output. The precise machining ensures it fits right into your KTM's cylinder, and the 11.8:1 compression ratio is carefully calculated to maximize performance without compromising reliability when paired with appropriate fueling and tuning.

Keep in mind that this piston is not CARB approved and cannot be shipped to California. For other states, it's a solid option for anyone looking to get more out of their KTM 500 EXC or EX-W engine.