The only clutch lever and perch I use is the Fly Quick adjust lever. It uses a lever with bearing in the pivot point, and is configured with a Honda ratio (better than Kawaki). With this modification, and continued use of only the stock cable, clutch pull is wonderfull. Also with the teflon insert that allows twisting of the perch when you get off while the bike is still moving, damage to perches has been eliminated. I have had the same perch for 2 years.
Rick