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I work with a Wimberly gimbal, and almost always with moving subjects. I leave both axis fairly loose, and they seem "equal" to me as far as friction. I keep my rig balanced very well in both directions, and even with the low friction I use, the camera will stay put if I let go. And I really like how well I can handle a large lens and track and shoot "big birds" at air shows.
You are probably hoping for responses specific to your Induro GHB2, and I hope you get some. You may perhaps have an issue that can be helped by a new bushing or washer, or perhaps with lubrication, but you should check with someone that knows before doing anything drastic to try to fix your one axis.