YAMAHA WR450F YZ450F Standard Bore Cylinder Kit by Cylinder Works 2003-2006

  • Sale
  • $ 435.15

Standard Bore Cylinder Kit Cylinder Works

WR450F - 2003-2006
YZ450F - 2003-2005

Made in the USA "drop in" Stock Size Cylinder
Vertex piston with Stock Compression - Complete with Rings, Wrist Pin and Clips
All OEM Stock Spec Gaskets Needed To Complete The Instillation Included.

Standard Bore kit. 12.5:1 comp, 95mm  Uses Vertex #22915

  • Nickel silicon carbide electroplated cylinder bore
  • NSC bore gives great wear resistance, oil retention, and ring seating
  • Vertex pistons are forged from 2618 aluminum alloy
  • Vertex piston features unique skirt shape and anti-friction coating
  • Piston profiles and compression ratios limit oil blow by and consumption
  • Includes all gaskets, o-rings, and seals necessary to rebuild top end
  • Easy drop-in installation requires no machining or modification of engine or cases
  • Kit comes complete with cylinder, piston kit, and gasket kit

**Some photos are manufacturer’s photos and are a representation of the actual item. Your item may vary from the photo depending on your application. Please read the description for product information**


We offer 1 business day shipping to the continental United States via USPS, UPS, UPS Sure Post, or Fed-Ex Ground. Most orders paid by 3:00 PM EST Monday-Friday will ship the same day. Some items are shipped separately from different warehouses. In these cases there will be two tracking numbers uploaded and delivery times may be different on each package. Please look in your purchase history for details. Hawaii, Alaska, Puerto Rico, Guam, and APO addresses: There is a surcharge to these areas, Please ask before buying to verify the cost. 

If you a have a PO Box, please provide BOTH the PO box and street address 

International Buyers

We use eBay's Global Shipping Program to save you on international shipping costs! All taxes, fees, and duties will be calculated for you upon checkout and are not included in the listing price. Please allow for additional delivery time. If shipping to your country is not available to you, please ask for a shipping quote prior to purchasing. Please include your post code/locality for an accurate quote. We cannot mark items as "gifts" or change the value. 


We accept PayPal, MC/Visa/Discover/AMEX (processed through PayPal).  North Carolina Residents Only: 6.75% sales tax.


Domestic return shipping for damaged items will be at our expense, International returns will pay return shipping. We offer a 30 Day return or exchange. Any item in which the buyer has changed their mind on or has been determined to be defective can be returned for a refund or replacement, buyer’s choice. Buyers looking to file a damaged item claim should contact us through eBay messaging PRIOR to initiating the return for instructions on how to proceed. Please include photos with your request. The item must be returned in complete original condition. For non-damaged items or items that don’t fit, return shipping fees are the buyer's responsibility. Items returned missing hardware or components, are damaged due to incorrect instillation, or are not the same item will not be refunded. Automatic returns and package refusals are charged a 30% restocking fee. Electrical items are non-refundable. If you have any questions about our return policy, or to obtain return authorization please send us a message through eBay messaging.


Although we stock many of our items, there are some that ship from our many warehouses across the country. If you have any questions about shipping and delivery for the item you're interested in, please message us. We will be happy to answer your questions. Thank you.