Ok, The motor is together and installed and I was not there when my buddy fired it last night but he called to say that they had it running and then shut it off. Then it got hard to pull and backfired so hard throught the carb it blew the choke butterfly out of it. Going to look tonight but just looking for some possibilities to look for... timing, valve's not adjusted right? These are very new to me so I'm still learning as I go but you have to somehow.