I recently purchased a carb rebuild for my 2001 yz426f. Everything looks like it was there EXCEPT the diaphram. I ended up putting the old diaphram back in, but I am not sure which way it is supposed to go. Does anybody know exactly how describe the correct position? Shoukd I have gotten a new one with my rebuild kit? I ask because I had the bike running, but it ran terrible and the bike was sluggish off idle (before and after the rebuild). I tried adjusting the pilot screw (1 1/4 turn out) as per the recommended setting, but now the bike won't even start no matter what I do. Any ideas as to why the bike wont start other than a backwards diaphram? Really stuck here need some help. Thanks guys!!