I have been doing some looking but i can not find anything conclusive to my question. I have a 1987 trx250x and it needs a cdi box. The question is will a regular cdi box work with it? It seems i can get a trx250 cdi for about 20 bucks but a specific trx250x cdi is over 100. They appear to plug the same. I just dont know how much different they are. Thanks for any knowledge on this topic. This is a very low budget build to ride while restoring my atc 200x.