New Vertex Big Bore Forged Piston Kit for Yamaha YFZ 450 X (10-11) 23007C. New Vertex Big Bore Forged Piston Kit For Yamaha YFZ 450 X (10-11) 23007C. 100% Brand NEW Aftermarket Part From Power Parts Pros. Big Bore Piston kit; +2mm makes 468cc.Kit includes: Piston, rings, pin, clips. This information can also be accessed by navigating to your Won items under. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Engine Parts\Other Engine Parts". The seller is "powerpartspros1" and is located in this country: US. This item can be shipped worldwide.