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Hi, I read this issue before but i can't seem to find it. The air in the plenum drains after removing the bottle. The bottle has a higher pressure than the plenum. The air in the plenum should remain. The regulator should be the issue. I do not know what happened and how to fix it. Thanks for...

It's been a year or two since my last post. This is my first time to encounter the issue. I have an FX Impact (600mm .25cal with with Power Plenum Kit (old one). Shooting JSB Heavy 33.9gr. 113 PSI Regulator pressure with 225 psi Cylinder pressure. Whenever I open the Hammer Spring Adjuster way...

What is the burst pressure of the Power plenum for FX impact? What is the working pressure? I see people filling it above 150 bar. 

I just want to share my new 12v/220 watt portable compressor. It has pressure and temperature controlled auto shutdown. So far, it works fine topping directly the 480cc bottle of the fx impact. From 100bar to 250bar, the temperature went up to 42C only in a few minutes. It is not advisable to...

My scope mount FX No Limit has alignment issues of about 2 moa to the right (tightening screw at the left side). Is this the result of the space created by the adjustment? When i mounted the scope with zero windage, the poi is 5moa to the right. I am afraid the issue will twist the scope. (Edited)

Someone called my attention about a cyclone water filter in addition to the cotton filter. It seems like only few knew about the internal cyclone separator of yong heng. It is located at the low pressure bleed valve. It is not as effective as the cotton filter?

Greetings of good health! I am done with upgrades and harmonic tuning. The scuba tank is too much when shooting and hunting once a week with one tin of pellets per outing. I have an fx impact 600mm with PP and 125 bar at 860fps. Refilling the scuba tank, setting my yongheng plus maintaining...

There seems to be a huge difference in sped deviation between the two. I have shot 4 strings for both the slug and the pellets without changing power wheel (No.5) and reg pressure (125bar). Given: FX Impact, PP with 57mm spring, 600mm slug barrel, 125bar reg pre., wheel at 5, FX chrono and...

Hello everyone! SOS! :) Got my Power Plenum kit for FX impact x a few days ago from Krale. With the stock impact x, PP and a 135reg pressure (bottle is at 250 to 200bar), valve at 4th line and Max power wheel (little or no slack with the adjeustment screw), i can only get 881 fps on the NS...

Hi, i saw somebody installed a PC cooling system on his Yong Heng Compressor. Comments and suggestions are appreciated. These are the specs: 

What is the effect of the new spring in the valve control knob adjustment on the C3 bumper? Long lasting C3 bumper or less? 

Hello everyone. My set up for comments and criticism . Sorry for the hanging cord.

Do you store your gun for a long period with the scope attached? 

Hi, I can tune the gun to hit 1/4 of inch at 60 meters with 5 shots. But as i shoot more, poi gets wider. Then, i have to tune it again using the valve. Target 1,2,8,9 are tuning shots target 3, and 4, (3-4 group shots) is the sweet spot but as i shoot more at target 5,6,7, poi are getting...

It was loosing 25 bars every 3 days. My initial suspect is spot on using hair shampoo and water. Will the water create rust or anything? Which should i use to remove the water and shampoo? Can i use the “dry lube” to lube the o-rings or the “silicon lube”? The dry lube indicates it is...

My 25cal fx impact x (with upgrade kit to mkII) can propel ns 33.5 at max 880fps (all dialed to max including valve lines). To fine tune at 860fps, it might not have enough speed designed for the slug and barrel’s accuracy. I intend to go back to pellets.

Hi, my fx impact x was accidentally fired while it is still in open bolt. An o-ring flew out from I don’t know and i felt the air going out and into my face. I am afraid it will break and did not fire again. What had happened? Help please.