One of my ATC's is powered by an ESR 78mm (350) big bore with race fuel dome and Eddie's TRX9 porting, fed by a 38mm Airstryker and ESR reedblock. Exhaust is ESR ATC5.
My jetting was a #52 pilot, DGH needle and 190 main. I still had a little more room to lean the main a size or 2.
I have another ATC that is a stock engine, stock porting, with a PWK36, Boyesen dual stage reedblock and FMF Fatty exhaust. The difference between that ATC and the ESR powered ATC is unbelievable!
I'm currently waiting for my new 41.2mm PWK to arrive from ESR to go on the ESR 350. I can't wait to see how it runs with that carb compared to the 38!
Once you get it broke in and dialed in you won't be disappointed with your ESR350!
Tip: Make sure you re-check your cylinder and head nuts after a little bit of run time....