i just bought a 93 kx 80. it hadn't been started in a while, about a year and a half, so i changed the plug, put new oil, gas and cleaned the carb. the carb was really dirty and i had to clean it 2 or 3 times to get a thorough clean, but in the end resulted in the bike starting. the bike wont idle, and after that i tried cleaning the carb again, i kicked it once and it idled great! i turned it off after about a minute, and came back about 30 mins later, and it wouldnt idle again, any ideas why this could be? ps, the bike smokes ALOT, and oil leaks from the plug and pipe, i think it might be the rings, but the previous owner said they were just replaced.