Why when i purchased a 165 mikuni jet it was alot larger in the hole size than dyno jet 165? I had my old needle in my dj box and decided to stick it in the dj 165 and than mikuni 165 and my god big difference.I also did the 160 on both aswell,and again they are different.Could this be just a manufacture error or are the two companies not play well with each other?The reason i ask is when we get jetting help on this awsome forum, are we to buy mikuni jets or dj jets?I heard Eddie saying there is no difference,but i could not believe my eyes. My bike is 2007 drz400s. SSW/MRD EXHAUST. DJ STAGE 2. k&n filter. 160 main jet(mikuni). 27.5 pilot jet 3 turns(kteck). Hotcams IN and OUT. 3.5x3.5 hole on top(i know). 15/48 gears. This bike is quick,power lifts up in 3rd and in the right conditions also in 4th. I love everything about this site.