If your RPMs are slow to drop, check the carb boots. They may not be seated all the way.
I run 3 1/2 turns for front, 3 for rear with V&H Cruzers. You may not need to back yours out as far with stock pipes. Some also may argue a re-jet was not needed without changing your pipes. That one is a bit up in the air, but you may indeed have too large of jets for your exhaust.
1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Rebuilt Forks w/ Progressive Springs
VN750.com Grill Cover
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R
1990 Kawasaki Vulcan 750
1998 Honda VFR800 FI
2014 Honda VFR800F
1989 Pontiac Firebird Formula 350