I posted these questions (copied below) on another thread before I found this one. I had problems with the Motive 1108 cap. dhminer suggested that TyphoonFiST might have input.
I see that this thread answered my question about pressure: Use 15 lbs.
Here's all of my other comments/questions from the other thread:
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My 1108 cap is so tight going on, I'm concerned about damaging the reservoir neck. I put a spacer/block between the bottom of the reservoir and the reservoir mount on top of the strut tower, so that I wasn't bending the reservoir downward when pressing the cap on. I also put a little clean brake fluid on the rubber seal and on the top of the reservoir neck, so the cap would rotate easier going on.
Does your 1108 cap "click in" to the small detents in the cap grooves at the end of the grooves, like the OEM cap does?
Did you have any fitment issues?
Maybe my 1108 cap leaked at the tubing/cap fitting because the clamp was not installed tightly enough. I'll crimp it a little more and see if that takes care of the leaking.
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ALSO: After installing braided brake lines and flushing the system (clean fluid and no bubbles at all 4 corners) I still have what feels to me like a soft, inconsistent pedal. I'm on OEM pads. I've done a hard run, and will re-bleed for any more air in the system.
I see threads here (and everywhere else) with conflicting information about whether you have to "cycle" the ABS to get all air out of the brake system when bleeding. I understand that the ABS system could get air in it, but I don't understand how that could give a soft pedal when you are not braking hard enough to activate the ABS.
I've also read that if I repeatedly activate ABS by braking hard on a slippery surface, that will pass enough new fluid through the ABS and force out any air. But I don't understand how activating the system would pass new fluid THROUGH the system. It's not a close loop, with fluid circulating, right? It makes more sense to me that you could only flush the ABS by "opening" or cycling it when you've pressurized the reservoir and opened a bleeder?
As always, thank you all for sharing you knowledge!!