Start by reading this. http://www.mikunipower.com/Manuals/VM_Manual.pdf
Most common problem is the smallest passages don't get cleaned, most newbs blissfully unaware they exist, where to look for them, cross drillings, etc. Not magic, simple physics (vacuum) and a bit of hardware.
Whenever cleaning a carb, you MUST verify flow in all passages... again for the back row, you MUST VERIFY FLOW in ALL PASSAGES! Use aerosol spray brake cleaner, and make sure it comes out AS EXPECTED!
Too much is just barely enough.....
2007 Tiger 1050
2005 Royal Star Tour DeLuxe
1973 Yamaha TX750 1984 Yamaha RZ350
1974 Norton 850 Commando Roadster