Picture worth least twelve word...
The hack brake adjusts in the exact same was as the rear brake. As Rob mentioned, just thread the master cylinder's actuating rod in or out to get the response you want, relative to the adjustment of the rear brake.
Be mindful that you need to leave a gap between the actuating rod and the master cylinder's internal piston, but your adjustments shouldn't take you that close.
You do not have the required permissions to view the files attached to this post.
Virginia Beach, Virginia, USA
2015 Ural cT "Mobile Chernobyl", 1999 Ural Tourist "Desert DisGrace: the Iron (Oxide) Curtain", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)