Negative chamber transfer port blocked not allowing the chambers to equalise.
Strip, clean & regrease should sort it or return for warranty repair to retailer

Hermes, insured to value, seems to the favourite with customers at the moment

I had the same thing happen with my pikes, pumped them up to the max limit (150psi IIRC?) and cycled it a few times and it went up to 160mm travel again, Let the air down and it’s been fine for a couple of months now.

Try it a few times it had this on my revs too, and also pull at the lowers with no air at all in, it helped mine release the negative pressure in the lowers, just basically empty the air and pull as hard as you can at the lowers, worked for me

Mine were absolutly fine after that I don’t think you’ll need to send them in have a play with them

My revs did the same. Turn them upside down and undo the nut from the airside leg. You’ll see a valve. This is the negative chamber I believe. Depress the valve and release the air just watch for oil.

By no means a cure for any blockages but did this to mine and they’ve been fine since.

Did a strip and clean on the wife’s revs with same problem And they’ve been good too.

Do NOT do willy’s suggestion.
The Pike is different the neg chamber is the lower part of the air damper on the air side.

Mine did the same and I spoke to loco.
His suggestion was to ride it hard.
(I have changed the air damper and had grease in the port).
Ran hard down the final descent of the blade.
It fixed it.

Got the same problem with mine 🙁 started when I was playing with the bottomless tokens. My LBS has contacted Rockshox who suggested letting all the air out then pushing the fork to the bottom of it’s travel, partially filling with air and cycling the fork through it’s travel a few times then pumping up to the correct pressure.No joy, also pumped it up to 150 psi and cycled it up and down with no joy. It’s with my LBS at the mo for a strip down as per LoCo’s advice. If they can’t sort it it’s off to see Simon at LoCo as I need the bike for a foreign trip early next week.

If it’s just the port being blocked with grease and hard riding clears it then it sounds like people need to grow a set 😉

Well it seems the problem is grease in a groove in the internals and not a blocked hole as such. Sorted and ready to collect tomorrow. LBS got the info from Rockshox to sort it. Result

Only what my LBS said, will see tomorrow if its sorted. Otherwise it’s a trip to Wales and LoCo for me

Fozzybear you are wrong I’m afraid. It will have a dimple like this in it:

Well at least it’s a simple fix. Cheers for the info Rick 8)

Picked the bike up this morning, set the sag to 30%. Back to normal. Thanks to James at my LBS and Sram/rockshox/Fishers for their technical input. How long will you be without your forks Chris? Hope all goes well with your repair.

LBS were great for me,as @ Rick says sorted the problem. Bought motorcycles off them for ever. They started selling bicycles a few years ago. Same professional attitude. Love Em 😆

Thread revival…. Same problem tonight on a set of 150mm RCT3. Anyone have a step by step guide to cleaning said port if all the other suggestions fail!?

@Stamion

Could just be your pressure gauge is faulty, can you verify your gauges accuracy, got another you could try?

Hmmm…. I think I have the same problem.

Brand new Rev 120mm (29er) SoloAir.

With no air in, it’s sat right down in its travel. As I add air the fork extends. By the time I get to the recommended pressure for my weight it’s at about 105mm. Add a bit more air and it goes right out to 120mm.

Reading some of the advice above, I reckon this port/groove/thingy is blocked. I’ll try cycling it a few times with and without air in it. If that doesn’t work I’ll put enough air in to get full travel and go for a ride. If that doesn’t work I’ll send them back for repair.

That’s marvellous I’ve just pulled the pin on a set of 160 dual positions from Tf Tuned I hope it’s not that common a fault 🙁