What is a 'Big Bore' kit?

A big bore kit increases the engine's displacement by using a larger cylinder and piston. This generally results in more power and torque output from the engine.

What is the benefit of a molybdenum coated piston?

Molybdenum coating on a piston helps reduce friction between the piston and the cylinder wall. This can lead to improved engine life and slightly better performance.

Can this kit be shipped to California?

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

Athena

Athena 10-17 Yamaha YZ 450 F Big Bore Complete Cylinder Kit

Name: Athena 10-17 Yamaha YZ 450 F Big Bore Complete Cylinder Kit
Brand: Athena
Price: 1025.88 USD
Availability: InStock

$1025.88

Worn-out cylinders cause poor performance. This Athena Big Bore Cylinder Kit is a direct fix for your 2010-2017 Yamaha YZ450F.

Key Features

Direct fit — verified for 2010-2017 Yamaha YZ450F
Increased displacement — for more power and torque
Aluminum cylinder — lightweight and durable
Galvanic coating — on cylinder for improved wear resistance
Forged piston — stronger than cast pistons
Molybdenum coating — on piston for reduced friction and improved lifespan

Fits this vehicle

Yamaha YZ450F 2010-2017

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Product Details

Worn-out cylinders cause poor performance. This Athena Big Bore Cylinder Kit is a direct fix for your 2010-2017 Yamaha YZ450F. It increases displacement for more power and torque.

This kit includes a well-built aluminum cylinder with a galvanic coating. The forged piston comes with a molybdenum coating for improved durability and reduced friction.