Here's how we connected the rear set on the brake side on my KZ250. It's been suggested that the arm on the outside of the brake pivot...the arm my linkage attaches to...may be too short and not provide enough leverage. The arm on the inside of the swingarm is the stock length.
I haven't ridden the bike yet, but the linkage feels great and I can easily lock the rear brake up. That's with someone trying to spin it on the centerstand, not going down the road at 50 mph, though.
Think I'll have an issue here?
1) Cut stock brake lever/pivot.
2) Attached rear set linkage.
3) Complete set up.