http://www.americanrider.com/output.cfm?id=1023787

http://www.americanrider.com/output.cfm?id=1021951

http://www.shovelhead.us/forum/showthread.php?p=281336

try these articles.
I have a Dynajet kit in my bike, really like the performance but the mileage suffers
Bike runs well, plugs are very good, and it's not running too lean.

thinking maybe later this year about putting on a Mikuni HSR42, have read and heard excellent things about it..

 

I wouldnt spend the money on the Mikuni. I just rode a bike with one of those wasnt impressed. I ran all over that bike with mine, not even close performance wise.

 

I've got one in my 2000 95" FLHT. Like the others, performance is pretty good but it's hurt my mileage. Range is important to me, I'm planning to ditch the dynojet kit tis summer and try the Joe Minton suggestion.

Oh yeah, the sportster needle part number is N72s