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There's no problem when going from in the travel to full extension, no top out issues there.
Its when you're not riding, lift up the front wheel, give it a second, then the forks extend an extra couple of mm with a little knock. Then if you proceed to gently weight and unweight them, they have a couple of mm of free compression and extension.
These have the air spring where it's one piston passing a dimple in the leg to equalize the pos and neg chambers right? Is the knock the two chambers equalizing and will settle down once they've reached equilibrium at extension?
Not quite right. The Solo air works with a schrader valve core in the piston.
At rest it's open and sets both chambers to equal pressure (effectively one big volume at rest) - it closes when the forks start to travel. What you are feeling could just be the travel it takes the valve core to close, but I've not felt a knock on my Solo Air Lyriks.
As I found out, this is why you can't fit an all travel spacer and need a new solo air spring assembly. Fitting the spacer allows the internals to move, potentially activating the valve core and equalising the pressure. If this happens mid stroke, that's where the fork then zeros at!
Im pretty much 100% sure it isn't the schraeder valve in the piston kind ala lyriks. Looking at the spare parts catalogue with an exploded air spring assy, defo solid piston, no valve.
It's dimple in legs ala newest revs and sids.
All i can think of at the moment is that theres a bit of gunk in the chamber exchange dimple or they're swapping air cos th piston aint sealing.
Gonna ring sram tech.
Its normal.
Got buddy in a shop used to work in to try his pikes and the owners pikes, same sympton.
He rang sramtech who assured that its normal, they also confirmed it is the dimple type solo air and a symptom of the the design.