What is the bore size of this cylinder kit?

This is a standard bore cylinder kit. The bore size is 95mm, which matches the original specifications for your 2004-2011 Yamaha YFZ450.

What materials are the cylinder and piston made from?

The cylinder is made from aluminum with a galvanic coating. The included piston is forged and features a molybdenum coating.

Can this cylinder kit be shipped to California?

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

Athena

Athena 04-11 Yamaha YFZ 450 S 95mm 450cc Standard Bore Cylinder Kit

Name: Athena 04-11 Yamaha YFZ 450 S 95mm 450cc Standard Bore Cylinder Kit
Brand: Athena
Price: 640.60 USD
Availability: InStock

$640.60

Fits 2004-2011 Yamaha YFZ450. Athena standard bore cylinder kit with aluminum cylinder and forged piston.

Key Features

Direct fit — verified for 2004-2011 Yamaha YFZ450
Aluminum cylinder with galvanic coating — helps with heat dissipation
Forged piston with molybdenum coating — reduces friction
Standard bore size — matches original engine dimensions
450cc displacement — maintains original engine size

Fits this vehicle

Yamaha YFZ450 2004-2011

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Product Details

You get an aluminum cylinder and a forged piston in this Athena 450cc Standard Bore Cylinder Kit for your 2004-2011 Yamaha YFZ450. This kit replaces your stock cylinder and piston to get your engine running strong again.

The cylinder is made from aluminum and features a galvanic coating. The included forged piston has a molybdenum coating. These materials and coatings help with heat transfer and reduce friction.