..you can order, from Sutai, a "programmed" cdi that will manipulate your engines performance at certain revs...
..however, for most ppl, if you CAN de-restrict your cdi, by whatever method, then it's a FREE mod well worth the time it takes to learn how it's done..
..a "race" cdi is only better, if you also upgrade all the other ignition components...
..just my opinion...