I had purchased one of these forks last year from Chainlove ($300). After months of researching the maintenance on this fork, I finally performed the maintenance on it. With some help from Chris at RWC, the following is what I came up with.
I did replace the seals last year, shortly after buying the fork, because the OEM Magura seals are notoriously bad at sealing. That, and it's the main reason why Magura only recommends 2.5ml of oil in the lowers. After replacing the seals with Enduro for seals, I filled the lowers with 10 ml of Mobil1 5w30.
This time around, I disassembled the fork and performed maintenance on the lowers as well as the air chamber and damper leg. In the damper leg (right leg with red top cap) I used 5ml of Maxima Racing Fork Oil (5wt). In the air chamber I used RWC's 5cc pillow pack. And I again filled the lowers with 10ml of Mobil1 5w30.
Maintenance on these forks is extremely easy! I will post a couple of links to videos that helped me with the maintenance.
The sad part about opening up the fork like this was that I found NO oil in the air chamber or in the damper leg. I am not sure what happened to it. If it leaked past the seals, which I doubt, or if it was never filled (probably). When I drained the lowers last year, there was barely any oil there. If the uppers were filled appropriately, and it leaked out to the lowers, then there should have been more oil that drained out.
The good part (or great part) about performing this maintenance is that the fork is now a whole different beast. It is much more plush and responsive. The trails seemed to have smoothed out more as my front doesn't buck when I hit a bump. I haven't changed the settings at all. Rebound is set the same and I still fill it with the same amount of air.
I am sure I would have gotten the same result from using Magura's Suspension Blood, but that stuff is quite expensive and very hard to come by.
I only hope to help others who have this, or other Magura Forks still using oil, because info on these forks is quite scarce.
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