Hi Guys, Some info for you all....
Tying back the brake lever puts pressure on any air bubbles in the system thus reducing their size and having the effect of making the brakes feel less spongier but they will expand again after the pressure is released.
Hence the spongier feeling will worsen as the brakes warm up after usage as the bubbles expand, this is a major cause of brake fade with brake systems after repeated heavy usage.
The only real fix is to remove ALL air from the system using the tricks others have described, It can also help to bleed them after they have been warmed up which makes the bubbles larger and easier to move, cheers all, Tadpole
