i say email Gabe (the first guy who replied) he knows EVERYTHING there is to kow about the 400ex and engines. i urge you to email him and ask him what to do, he will tell you exactly what to do for the most power where u want it and how u want it.

 

Thanks for the info guys and I will e-mail gabe later.As far as me buying a 2-stroke I don't thinks so.I'm not bashing 2-strokes because those are the fastest things out there,but I just think that they have too much maintenance and they are all old designs.IF anyone has any more info it would be greatly appreciated!!!!

Thanks,
Dan