idle?? a leinweber.. mine with the L3S is like a sporty... the typical harley thumpty-thumpty is 99% impossible .. means nothing-- if ya listen to an old panhead the front at an idle is hitting and the back kinda shuffles... i have several REAL siftons most never used.. .412,414,55Q,475,500+575.. theres three .440 lift siftons ones a mild hyd .440 2nd is the .440 we see alot of -- and the last is a .440 for engines 86" up to 93" and then the ole chet herbert cams -- yeah he could re-grind a really good .412 and a .468... i put the leinweber E 7 in the 117 S&S engines NOTHING runs like that with a super "G" E 7 for 117,120,127" neighbors will hate ya BAD!!