Please tech my xvalve that's been sitting in a bag for years!

[Jonneh]

Whoa whoa whoa! I've not posted here in a while!

Anyway, I bought a ULT + Xvalved mag about 6 years ago then stopped playing without ever really using it so it's been sat in a kitbag since then. Now I've started to play again, I dug all my kit out and went about trying to get it to work; I aired the thing up and to my delight it shot and sounded relatively healthy all things considered, however shooting it at anything approaching rapid fire causes it to cough and splutter and over the chrono, the velocity was all over the place, even when shooting very slowly.

Can you nice chaps help me out any maybe suggest what may be going on?

Some other stuff that might help:

* My only HPA bottle is on Guerilla Air Myth which according to the website outputs ~650psi as standard, this sounds a bit low for a mag
* The RT effect (the pushback on the trigger) was very weak making it extremely easy to shortstroke
* I put a classic lvl10 mag valve in there which shot just fine, so I'm p confident it's an issue with the xvalve rather than the body/grip/rail
* I've taken the valve and ULT assemblies apart and they all look correct from what I can see, unfortunately I've either lost (or never had) the parts kits so I've been unable to test stuff out by fiddling with various springs/shims/oring carriers

Any ideas?

Cheers!

[xero28]

Might have something to do with the tank reg. Yeah, it says that it SHOULD put out 650 psi, but depending on a few things, that probably won't happen. I've used a myth reg on my RT Pro valve (same internals as the X-Valve) and it caused some crazy things to happen (full auto, sputtering, etc). I checked the output and it was barely 600 psi. I put on a Max-Flo micro reg on there outputting over 800 psi and the valve worked like a champ. Before you start tweaking the valve, try and get a higher outputting tank on there to see if that helps any issues.

[OPBN]

You need a higher output reg.

[suaze]

I can't get my ULT Xvalve to RT either. I'm using a SHP Ninja tank. I've heard others have had success. My other Xvalve with regular on/off RTs just fine though.

[OPBN]

I can't get my ULT Xvalve to RT either. I'm using a SHP Ninja tank. I've heard others have had success. My other Xvalve with regular on/off RTs just fine though.

Take out the ULT.

[Jonneh]

Thanks guys, I'll see about trying it out with a higher pressure.

Is the reduced RT something to be expected when using ULT?