I have a 48 cc sky hawk,I can't figure this engine out it's got a miss in it.I'm stumped what it can,be tryed a couple different carb on it same thing.The miss is bad enough to kill engine at idle.I have to set the idle higher to keep it from dieing and I have to keep hitting throttle to keep it running at idle.I replaced cdi and magneto didn't help too.It sound like something is hitting at low idle but the higher you rev throttle it goes away.but it just won't idle right because of it.Hope someone has some Idea's for me. Thanks