Just had my motor rebuilt recently. Has T5's, bored .20 and had an aggressive dune type port done. Stock carbs (with tors) with 270 mains, needle one down from the top notch, and i believe stock pilots.. I am in Mid michigan about 500 ft above sea level.
Was jetted perfect before the rebuild and now....
Starts first or second kick, idles decent, but has a Very LOW rev and backfires and sputters, no power. Compression is good, and no air leaks.....
wondering if it would change my jetting that much or maybe a tors or other issue?