This is EVEYTHING you need to completely rebuild your TRX450R into a 500cc monster!! There is direct bolt on equipment, no machining required, no other mods required. This is everything you need to put a motor together right in your own garage with no special tools or special machining equipment. This is all the parts you need to change your TRX450R to 500cc.These are all matched components from the same company (HotRods, Cylinder Works and Vertex) designed to work together. These parts where all made to work together reliably and problem free. Brand new Cylinder Works cylinder: Size: +3mm (97mm bore). Vertex 10.5:1 Piston +3mm (97mm), complete ring set, piston pin, retaining rings, gasket kit included. Ready-to-install, direct bolt-on cylinders require no replating and look virtually identical to the OEM. Nickel Silicon Carbide plated for long life. Honed to exact size for easy piston installation. Big bore cylinders do not require machine work. Big bore cylinder kits come complete with gaskets, cylinder, piston, rings, pin and clips. Factory assembled and trued to OEM specifications, HotRods Cranks will meet or surpass the OEM in performance and durability. HotRod cranks are completely rebuildable with Hotsrods rods. HotRod cranks come completely assembled and ready for installation. TRX450R main bearing and seal kit (04-05) #K046. 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 "apex*racing" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South Africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi Arabia, United Arab Emirates, Qatar, Kuwait, Bahrain, Republic of Croatia, Malaysia, Brazil, Chile, Colombia, Costa Rica, Panama, Trinidad and Tobago, Guatemala, Honduras, Jamaica, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, Ecuador, Egypt, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Vietnam.