Athena 100mm 493cc Big Bore Cylinder Top End Kit With Gaskets! This is the best and most reliable big bore cylinder on the market! Years 2006 2007 2008 2009. 100mm Nikasil Athena Big Bore Cylinder.Larger Water Jackets To Keep The Motor Cooler! Athena Complete Top End Gasket Set. This item is in the category "eBay Motors\Parts & Accessories\ATV, Side-by-Side & UTV Parts & Accessories\Engines & Engine Parts\Complete Cylinders". The seller is "azquadparts" and is located in this country: US. This item can be shipped worldwide.