Help please with 2 into 1 pipe

[cato]

My buddy just put a 2 into 1 pipe on his 03 Banshee. I am not sure what brand. It runs like shit his jetting is all off. Someone please tell me a good starting point for jetting. What size main, pilot, where shuold the needle be set?
Thanks

[369DuneBunny]

when you do jetting stuff start rich and lean it out.... and with the 2 into 1 settings you always need to jet way richer than you would the regular twin set up. that's all i got.

[zillaguy89]

more info......stock carbs? full airbox or no lid or clamp ons????

[Aussie Bloke]

if hes got an aftermarket filter if probably go 27.5-30 on the pilots........290-300 on mains then lean it down if thats too rich.. leave the needle on 3rd clip for time being midrange is easier to dial once everything else is sorted..

thats wat id do anyway

[Aussie Bloke]

thats for like were i live like 25"c if ya super hot or cold thatd change it

[cato]

Everything is stock! Carbs, filter ans lid. I will try all suggestions. Thanks

[flotek]

270 mains ....stock pilot jets..... needles in middle position ..air screw out 1.5 turns

[superevil]

I ran a dynoport 2 into 1 exhaust with stock everything else. I ran 27.5 pilot and ran a 250 main i believe and it ran great