What is the compression ratio of this piston?

This JE Pistons single piston is designed to raise the compression ratio of your Yamaha YZ 450F to 13.5 to 1. This is a significant increase over stock and will result in more power.

Is this piston a direct replacement for the stock piston?

Yes, this piston is intended as a direct replacement for the stock piston in the Yamaha YZ 450F. It is designed to fit within the existing engine configuration.

What kind of fuel should I use with this higher compression piston?

With a 13.5:1 compression ratio, it's highly recommended to use high-octane fuel to prevent engine knocking or detonation. Always consult your engine builder or a qualified mechanic for specific fuel recommendations.

JE Pistons Yamaha YZ 450F Piston 274184S

Name: JE Pistons Yamaha YZ 450F 13.5 to 1 Piston Single
Brand: JE Pistons
SKU: je-pistons-je-pistons-yamaha-yz-450f-13-5-to-1-piston-single-t14-695367
Price: 374.99 USD
Availability: BackOrder

JE Pistons Yamaha YZ 450F 13.5 to 1 Piston Single

$374.99

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 forged piston for Yamaha YZ 450F. 13.5:1 compression ratio.

Key Features

Fits Yamaha YZ 450F.
Forged construction for increased strength and durability.
Raises compression ratio to 13.5:1 for improved performance.
Single piston replacement.

This piston is designed for the Yamaha YZ 450F. It is not CARB approved and cannot be shipped to California.

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Product Details

If you're looking to get more power out of your Yamaha YZ 450F, a higher compression piston is a solid way to go. This single piston from JE Pistons is designed to raise your compression ratio to 13.5 to 1, which means you'll get a more powerful explosion in the combustion chamber. This translates to improved acceleration and overall performance for your dirt bike.

JE Pistons are well-known for their forged construction, which means this piston is built strong to handle the increased pressures and heat that come with a higher compression setup. Forged pistons are significantly more durable than cast pistons, making them a popular choice for performance builds. This piston is a direct replacement for your stock piston, making installation straightforward for someone familiar with engine work.

Keep in mind that this piston is not CARB approved and cannot be shipped to California. Always ensure your engine is tuned correctly to take advantage of the higher compression and prevent detonation.