So, this morning I serviced my Pike 454 Dual Air U-turn forks. The Moco dial had become sticky and they were leaking oil, plus they were about due a fresh batch of lube.
Everything seemed to go ok, until I got the forks back in the bike and pumped them up. The positive went up fine, however the forks were sat much higher in their travel than normal (about 15mm further than the 140mm line). Then, when I inflated the negative chamber, which took much more pumping than usual, nothing happened and the forks just became even firmer.
My first suspicions were confirmed when I unscrewed the foot nut and a air escaped. It seems that the negative chamber isn't sealed properly and is leaking air into the fork leg, causing them tho harshly top out. This is strange because I didn't even meddle with the air spring, other than cleaning and re-lubing.
So, what should be done? Ideally I don't want to send them off for an expensive service as I'm a bit strapped at the moment.