You say carb is clean..do you mean it looks pretty clean or you just finished a rebuild?
Clearly you have a carb issue..I don't need to tell you that. Get a good quality overhaul kit and the service manual and rebuild it..
While you are at it drain and flush your tank and lines with fresh gas!!
Should be pretty straight forward..
Current toys..
1986 Honda 350X..trail bomb!
1985 Honda 250SX..my main mudder
1985 Honda 250ES..Back in Black Trike
Current non-trike toys:
1990 Honda TRX300FW
1995 Seadoo GTX
1998 Polaris Indy Lite 340(Nearly new looking)
1998 Polaris Touring 500
1998 Club Car (electric)