I already explained what to look for in the carb.
it sounds like you have the slide in wrong.
also check that your choke is opening and closing all the way and that you don't have it closed while you're trying to ride.
I still think that you have your clutch way out of adjustment.
you should be able to tide your bike like a motorcycle using the clutch. man if you can't figure out how to adjust a clutch, what can you do?
adjusting a clutch is pretty much common sense for anyone who knows anything mechanical.
what do you mean the only way to stop it is to use the kill switch?
do you mean to stop the engine, or to stop the bike from moving?
if you can not get this engine / bike to work right i suggest that you forget the whole thing.
paret of building/ridingone of these things is trying to get it to work right and tinkering with it.
if you were expecting to get a kit, slap it on a bike and be riding 3 hours later, you must have been dreaming.