twin stack carb set ip any sugestions plz

[gezzapaw86]

Hey peeps just fitted a twin stack full system to my Nc30. And she's. Developed a flat spot /missfire. At about 7 grand only when I'm cruising. Flat out she powers through like a train. At the mo. I'm running 120 size jets all round with one of rick os. 0.5 mm washers. Under each needle. With. High flow filter and drilled out diaphragm s any ideas. On the best Carb set up to suit. Thank

[speedy231278]

viewtopic.php?f=24&t=14524

[JORDAN8710]

Ive just fitted almost the same setup to my nc30 apart from i went for 122 rear jets (mhp twin stack, hi-flow filter, drilled diaphram and rick o needle washers). I havent started mine yet, Hope i dont get a flat spot too haha

[gezzapaw86]

Hope not think its got so.ething todo with the inlet going to have a play next week let me know how yours goes mate