Registered Forum User
Ducati Corse
Posts: 3,134
Join Date: Jan 2002
Location: notts
Mood: Bloo and Yellow.. and Red now ;)
Could well be dirt etc around the pivot and push rod.
Only other thing that could be happening is the piston in the master cylinder is on it's way out. The rear doesn't get the attention the front gets, or the use and the moisture in the fluid can cause corrsion in there.
Pull the pedal off and check the cylinder itself is working OK and returning fully on it's own.