2014 yz250f with a cylinder works 270 kit installed. The bike was purchased new in October of 2014 from triangle cycles of Durham. The full cylinder works big bore kit was installed 5 hours ago with a new timing chain and runs great. The fuel mapping was also updated to match the big bore. I'm including the stock cylinder and piston with the bike so you can return to stock if you want. I'm only selling because I decided to go back to a two stroke. Bike also has an acerbis chain slide and a sunstar o ring chain. You won't find a thing wrong with this bike. It's ready to ride or race as it sits. Bike had fresh oil and oil filter every 5 hours and a fresh no toil air filter every time it needed it. Valves were checked regularly and are well within spec. Total control racing suspension set up for 195-200 lb rider. Brand new Acerbis plastic kit just installed. $200 due immediately upon sell. The rest will be paid in cash upon delivery. I will deliver or meet within a 100 mile radius of 27574.