Running rich on right side

Having trouble with 1973 t140v bonnie.

Have just fitted brand new wassel carbs and new boyer ignition system! Had full electronics tested and checked and all is working the way it shud except for the right side of the engine. Once started the right side is alot cooler than left. Spark plug becomes wet with fuel and upon inspection with a camera found a liitle fuel sitting on piston! When i shut the fuel off on right hand side the black smoke from exhaust stops and bike runs sweet and heats up perfect, then have too put fuel back on to fill carb. Obviously there is too much fuel going into the engine on that side. Been told its the float level. Anyone had this issue or have any idea if im missing something.
Cheers
Tiger