Another Exhaust Question - 78 KZ 650 B

Hey all:

2 part question:

1) What exhaust systems will allow retention of the centerstand. (I went to Dennis Kirk and saw Kerker and V&H)
Will the V&H allow me to retain the much loved center stand?

2)What jetting will I need if I go with a stock set up + Kerker or V&H?

THanks in advance. I am sure 1000 people know the answer to this one.

I believe Kerker and V&H do allow center stand retention. With a 4-1 (Kerker) and stock air box (K&N filter) I run 105 mains and 17.5 pilot but think I need to go up to 107.5 mains. Other 650 owners will chime in....