Love it! One comment on the xrr shock bleed since it's my favorite bike ever: I agree 100% that your bleed method is perfectly fine, and the tiny bit of air doesn't matter, but I will say I like the cleanliness and laziness of using the vacuum bleeder. I have a fitting that goes in the HS port of the xrr shock, I just stick the valve stack in after vacuum bleeding. Totally not needed, but it's less messy and less annoying. I can't remember if I bought or made the fitting, but if you really wanted one I'm sure I could come up with one for ya. I can turn you one on the lathe if nothing else. Keep up the amazing videos!
I would assume with the slave the o-ring got soft or maybe worn enough that piston wiggled or became cocked in the boar and wore the metal down creating the glitter effect that took the whole deal out. If the slave got dropped on install or something to create the flat spot maybe enough to cock the piston or cause the rubbing. You'd have thought that would have tanked it way sooner. I have over 400 hrs on one with zero issue. I find they usually don't have issues.
I just did a reseal on my XRR shock and the local shop wanted $50 to add nitrogen. Needless to say, I'm looking for someone else to recharge it. I enjoyed your video.😁
If I had a 7 year old KTM with suspect elec problems in the head unit (behind the number plate), especially since someone tommy-tomahawked existing wiring, I'd check continuity from the head to the chassis at that flex-point where the triple clamps meet the frame. That wire bundle has flexed back and forth and could have work hardened one, if not several wires, causing things like loss of ground and 12v power. Intermittency is a huge flag.
My XR400 shock makes a squishing sound. Low hours on self service. Fresh seals and fluid... Whats causing the squish? Worn shock body? Worn piston band?