I talked to Bill Blue of B&B Cycles tonight. He make a 351cc big bore kit for the Kawasaki KLX250S. I asked him if he was interested in making a big bore kit for the TW200. He said he would need an cylinder to look at or just have somebody measure theirs to see if it possible. He said there would be a mimimum of 4 kits at a time. Anybody interested or know if it is possible? His phone # IS 316-640-3629 if anybody has a cylinder for him to look at.