Jetting 34's

I have a 1075 street compression,.410 lift cams on in,and ex,stock valves,really big ported head,and Im running 34 rfs.Trying to dial in the jetting,ran lean with 125 mains,pilot screws are 1/2 turn out,17.5 pliot jets,starts and idles good,clips in the center of the needles.Installed 127.5's,better on top,when ideling and ya hit the throttle,has a flat spot at 1500,then revs hard afterwards but blow a little black smoke at around 3/4 throttle.Im thinking a 20 pilot,and drop the needle one spot,what do ya think?

Interesting jetting for a BS34.... didn't know they made BS30/96 pilot jets in that small a size. Stock pilots are #37.5 for most KZ models and you definitely need a bit bigger than stock. The mains are stock type sized as well. Try around #140. What jet needles are in there?

34rfs. Are those Smoothbores? or a stock KZ carb?

wiredgeorge wrote:

Interesting jetting for a BS34.... didn't know they made BS30/96 pilot jets in that small a size. Stock pilots are #37.5 for most KZ models and you definitely need a bit bigger than stock. The mains are stock type sized as well. Try around #140. What jet needles are in there?

What?,its a kz,never ran 37 pilots in one before,right now Im at a 20 pilot and a 130 main,with the needles in the middle and Im very close,this thing is pulling hard...stay tuned!