jetted carbs ?s

i jetted my stock vm22s for my 77 kz650b-1 and now have a few ?s
my set up is
emgo pod filters, zx600 exhaust system (stock for 600r 1995), 110 main, 17.5 pilot, needle clip in 4th position and 2 turns out on air/mixture screw (bottom of carbs)
when i hit the throttle hard and reach 4000 rpm it cuts out, then kicks back in when i ease up a little on throttle. it also seems to be hesitant to get to 7000rpm and it sounds like it struggles to do it! i think its running rich as plugs are a little sooty. and the coils do have 12+ volts.

before i did any changes like adding pod filters(reason for jetting) the stock air box and new filter, zx600r exhaust ran super good together!
i could reach red line and it never cut out or was hesitant to go.

i may just go back to the stock airbox! but want to see if anyone can help or see a obvious fault with my settings

timing was good before i did the jetting, ,,, do i need to re-set timing to allow for change?

or try putting clip on #3(center) positoin on needle?

steveo_4192003 wrote:

before i did any changes like adding pod filters(reason for jetting) the stock air box and new filter, zx600r exhaust ran super good together!

It is probably running lean now if it goes weak as you try to tach it up to high revs.

steveo_4192003 wrote:

i may just go back to the stock airbox!

Sounds like a smart move.