Originally Posted by Dave Henshall
also depends on the size of the mater cylinder which is sized initially to move enough fluid to move the 2 std pistons on the fron andn the 2 tiny slave cylinder in the rear hubs - once you increase the amount of fluid needed to apply the brakes by adding bigger brakes with bigger pistons and caliopers (more aparent on the back) you will find that brake pedel travel is greatly increased as yuo have to move more fluid to make the brakes come on - you may need a bigger master cylinder...
BINGO!!! You hit the nail on the head (where were you when i needed you
)
When i had air in mine my pedal would hit the floor and the brakes would barely work, once bled the pedal had a fair old travel but did get firm. MOT centres can fail on excessive pedal travel though. Mine was ok, but to be honest the brakes feel no better, if not worse than they were, a bigger master cylinder HAS to be fitted IMO if your going to do the brakes. What size is your master cylinder currently?