I took my stock 4" riser off and put on a 6" riser, seems perfect for me now and I am 6'2"
I have also heard if you put the ISO vibe from Grip-n-Rip on you will get about the same rise. I choose the 6" riser and pumped about a tube of silicone in my bars to isolate any vibration I might get from the MIGHTY TWIN !!!!!!!!!!!
Later.................Flash and Flare