72 honda cb350 twin

hello and thank you for taking the time to read, and hopefully, respond to this thread. I bought my first motorcycle last summer. it is a 72 Honda cb350. I rode it around town for a while and when I got an internship I rode it approximately 70 miles to and from the workplace. Unfortunately...

'72 honda cb350 twin. i just rebuilt the carbs and the bike's up and running now. it's idling well and rides well in 1st, but upon shifting through 2nd and 3rd there's a drop in power (won't throttle up), it backfires, and it starts to choke badly. is it not getting enough fuel? do the carbs...