2Bros Parts

Yamaha YZ-F 450 2006-2009 98mm 478cc Big Bore Kit

$971.67

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Delivery to United States 5–8 business days

Spread the cost with Klarna

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Cylinder Works Big Bore Kits provide everything needed to transform your bike from modest to monster in one box. Includes a stock-appearing, nickelsilicon carbide, precision honed big bore cylinder kit, all required gaskets, and a Vertex big bore piston complete with rings, pin, and circlips. Bore size is 98mm, displacement is 478cc.

Specifications
SKU
CW.21003-K01
Brand
Cylinder Works
Availability
In Stock (2)
SKU
CW.21003-K01
Brand
Cylinder Works
Availability
In Stock (2)
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Cylinder Works 98mm 478cc Big Bore Kit

Transform your engine performance with the Cylinder Works Big Bore Kit. This comprehensive package is engineered to deliver a significant increase in displacement, effectively taking your engine from stock performance to monster power. Designed for reliability and high-end output, this kit provides everything necessary for a complete top-end upgrade in one convenient box.

The kit features a precision-honed big bore cylinder that retains a stock appearance while offering superior durability. Each cylinder is finished with a Nickel Silicon Carbide coating to ensure optimal heat dissipation, reduced friction, and an extended service life under demanding riding conditions.

Key Features

  • Increased Displacement: Boosts your engine to 478cc with a 98mm bore for enhanced torque and horsepower.
  • Complete Assembly: Includes the big bore cylinder, a premium Vertex piston, rings, pin, and circlips.
  • Full Gasket Set: Comes with all necessary gaskets required for a professional installation.
  • Precision Engineering: The cylinder is precision-honed to exacting tolerances for a perfect fit and reliable performance.
  • Nickel Silicon Carbide Plating: Enhances wear resistance and improves thermal management for long-lasting durability.
  • Stock Appearance: Designed to maintain the factory look of your machine while providing substantial internal performance gains.

Whether you are looking to revitalize a tired engine or simply seeking a significant power advantage on the track or trail, this Cylinder Works kit delivers professional-grade components that meet the needs of serious riders and racers alike.

Before you buy

QUESTIONS? JUST ASK

Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00 (UK time).

Call or email us with your make, model and year and we will check it for you before you order.

Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.

Any customs duties or import taxes charged in the United States are paid by you when the parcel arrives. Any tax we collect ourselves is shown at checkout before you pay.

More answers in our FAQ.

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