I spoke quite a bit w/ a tech. at Suitai. (They make the cdi for Kymco) The reason the cdi's are so short lived is the derestriction that we do. Basicly the cdi has a programed chip that contains the limiting info. When you cut the wire leading to the chip and ground it (2t) you are delivering more amperage than the chip was designed for. On the 4t models you are cutting a loop and bottlenecking the current that is designed to flow. Suitai will program their cdi's to ANY specs. you need, ship it to you w/ a 90 day warranty. (try to return one to Kymco). You can contact them on the web, and there is an international # to get an english speaking rep. With the cdi I purchased I am confident I will not be buying them by the six pack anymore. Ps. w/ shipping from tiawan it cost $2.00 more than going to the dealer for one