Motorcycle Repair: 88 harley sporster, harley sporster, wire tie

Question
when i start the bike and let it worm up the bike idols really high after its worm and wont idol back down if i give it throttle it will idol up even higher what is wrong

Answer
Might be that the enrichner cable has snapped just behind the gold colored nut that you'd tighten against the mounting bracket by the knob that you pull on, in the plastic area. Causing it to stay on a little bit or you might have a throttle cable line routing problem, like a wire tie pinched to tightly under the gas tank.