clutches

I bought pcw's stiff clutch spring took out the barnett clutches and put back in my old eom clutches, and now I'm getting 4th and 5th gear slip. So barnetts suck so I'm between the OEM's and EBC's clutches, which are better, they look like they are possibly made from same material. so which is...

O.k.... I'm looking for advice on a clutch for my dragbike.... I have found a few and wanted to know what the drag racers think is the best bang for the buck... http://www.mtceng.com/index.php?option=com_content&task=view&id=39&Itemid=44 ?Yamaha V-MAX 2 Stage Lock Up Clutch MTC Yamaha V-Max...