High idle problem need help

recently acquired a 1986 honda trx350. sat for two years and the guy wanted it for ice fishing. fixed the valve cover leak and carb issue is where im stuck. rebuilt a carb and installed it started fine just idled really high and cant get it to come down. using the choke wont help the problem one bit. installed another carb and did the exact same thing. stuck and out of thought. need help!!!