Originally Posted by lukemillar

I wouldn't touch pattern levers with a bargepole.

A guy I race with fitted a new pattern brake lever to his GSXR. On the first practice lap coming down the back straight, his front brakes lock on, almost throwing over the bars.

Get back to the pits and we try all sorts- stripping and cleaning the calipers, pistons, checking seals and everytime, after a few heavy pulls of the lever, the calipers start to bind again. Turns out the the recess in the pattern lever for the master cylinder pin was too shallow so when it was bolted onto the perch, it applied pressure to the master cylinder. Not enough to notice at first, but enough to lock the brakes as soon as the were used harder.