If you were braking hard with EBC Greens, you wouldn't stay on the track. They aren't made for that and would fade like crazy.
DG Viper, The universal cap works fine for many but you have to admit, hooking that chain around the reservoir and twisting the screws until it supposedly seals is scary considering what will happen if fluid squirts all over the engine.
The new cap they have fits like the regular reservoir lid. Just screws on.
......NCharg, You found your problem. Bleed with Motul and get those Greens off the track and you'll be amazed. Go back to Greens when on street for no dust.