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Hi guys,

Can someone ID the problem or advise me to cylinders can fit the KWA KM4 gearbox?
Recently I got zero air pressure in my KWA KM4 RIS so I though the cylinder head got cracked or something, therefore I decide to replace it with Modify Aluminum Cylinder Head Dual O-Ring but unfortunately the problem still the same, however I got SHS cylinder type 0 it has the same measurements but surprisingly doesn't fit in the gearbox!
Back to the air pressure issue, when I test the new or the stock cylinder heads in SHS cylinder I got %100 air seal, but when I sit them back if the stock KWA cylinder I got zero air seal..!
Is there are some one ever face same this problem before?
What cylinder can fit KWA KM4 RIS gearbox?
Note the stock cylinder looks completely ok but it doesn't work for somehow..
Thank you.

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You could do some compression tests with both cylinders and see if you can find any problems that one has but the other doesn't.

 

Are you sure the cylinder head is pushed into the cylinder all the way?

Edited by SlabGizor117

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