Installed the new slave cylinder and it took me 3 hours to bleed it. The Mityvac was useless, wouldn’t pull any fluid. Activating the master cylinder with the key on, then off helped. I was getting SH_26 code during the bleeding, and had me worried that the clutch activator motor was bad. By removing the slave, turning on the key, opening the bleeder valve, and pushing in the piston by hand, close the bleeder, turn off the key, and it would draw fluid from the reservoir. Then repeat until no more bubbles. Then I mounted the slave on the engine, turned the key on, and no more SH_26 code. Went for a test ride and it was perfect. No slipping at all, and clutch engagement rpm in 1st gear was normal 2,000 rpm. Whoever worked on the bike before me, put the clutch judder spring in backwards. It works noticeably better when you assemble the parts the right way.