If you want to get more from your machine, pick up Cylinder Works Big Bore Cylinder Kit, 478cc to give your ride with a whole new attitude.



  • Nickel Silicon Carbide plated cylinder
  • Bore comes properly sized and honed
  • Easy bolt-on installation
  • No machining or alteration of your engine or cases needed
  • Kit comes complete with cylinder, gaskets, and piston kit
  • Replacement piston kits and gaskets available


Yamaha YFZ 450 | 450R Compatible Years:

  • 2009 through 2020

Cylinder Works Big Bore Cylinder Kit, 478cc - Yamaha YFZ 450

$599.99 Regular Price
$569.97Sale Price
  • About Our Parts

    We have all NEW, Genuine OEM, NOS, vintage and obsolete parts. Therefore, we cannot guarantee availability on NOS or obsolete parts.


    However, if there is an obsolete or hard to find part that you are looking for, that is not listed on our website, please email us and we will most likely be able to get it for you.

  • Shipping and Deliveries


    All in stock merchandise will typically ship within 3-5 business days, after purchase date. *unless otherwise noted on the product detail page or stated via phone/email*



    Most orders will be delivered between 3-5 days, after your item(s) have been shipped! *depending on delivery option choosen at checkout* 

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