carb troubles

I bought a 94ss cam and 22lb springs from dyno cams and installed it in my motor. Stock crank,rod,piston,valves. slightly ported intake and exhaust and now i cant get it to idle or run very well. (timing is definitely correct). I have the stock pulsa jet carb with a fixed jet :/. What can i do...

So i bought a mini bike a few days ago. It has a Tecumseh engine on it and for some reason i cannot get it to stay running. It starts on 1 pull but dies out a few seconds later. I tried giving it some gas in that few seconds that it stays running and there was absolutely no responce from it at...

I have a 1970s briggs 2hp and i need some help with a couple of things First: the pull start when i pull it out it dosnt recoil by itself unless you beat the side cover Second: there is a crack in the carb where it bolts up on the 'flange' can that be welded ? Yesterday i cleaned the...