Re: How to bleed the clutch slave and line etc.???? (00996Duke)
Air bubbles rise to the highest point in a hydraulic system so that's where bleed nipples belong and are usually placed. In Ducati superbikes the bleed nipple is placed at the lowest point in the system (duh) so the only way you can bleed all the air out is for the bubbles to be carried along with the fluid as you bleed, and bleed, and bleed the system. It is possible to bleed the system without using a bleed nipple at the master cylinder, but it takes a lot more work.
So, the Ducati clutch line is notoriously difficult to bleed using just the nipple at the clutch slave cylinder. Evoluzione and Yoyodyne, two aftermarket manufacturers of slave cylinders, encountered customer bleeding problem complaints so began selling a banjo fitting having a bleed nipple for use at the highest point in the hydraulic system. It works.
Here’s what it looks like: