Are you pre mixing or running with the oil injection? Is the oil injection line hooked up or pluged if running pre mix? You should certinly buy or build a leak tester. A high uncontrolable idle is a sign of an air leak. Lots of times they are at the intake, between reeds and cyl, reeds and intake boot, cracked intake boot etc. Bad seals also and they can be done while motor is still in the bike most of the time. You want t make sure to leak test and fix any leaks or you will be doing a new top end in no time.
Also make sure the slide in the carb is moving freely and smoothly.