neos carb jetting prob

have a 70cc kit on the noes i was only running the old 50cc carb,with a 72 main jet,
and standard exhaust n air box. does any one have any idea how many sizes i should go up? have got the 82 in at the mo idles ok,revs then dies unless i back off the throtle-any ideas wot i should do? cratch:

 

wow this thing actually works with ur stock carb? what size isit?

 

A 17mm del which was running a 72 main! Would it b better to get a 21mm

 

i couldnt get my formula 50 to run right on standard carb with 70cc kit.
got a brand new TNT 21mm carb with loads of jets for £50 and only abit of jetting and setting up and ran perfect.

 

put the original jet in till i can get the 21mm carb,got it running ok runs fine if u use a bit of choke