The only time I bled hydraulic brakes were
1) When I moved some magura HS-11's hydraulic rim brakes from 1 bike to another. Had to disconnect the rear caliper to get
the line out of the brazed on line holder. They were on the 1st bike for 8 years, and I replaced them with HS-33's
had to bleed them after putting them on the other bike for the same reason, have never needed bleeding from 1996-2003
2) Broke the front hose of the HS-11's last year (unbled since 2003 as well) had to replace the hose (royal pain) and bleed.
3) Changing my XTR 970's from an IS caliper to a post mount, 4 years ago.
I have had 2 sets of XTR 960's never bled them and have 2 set's of 970's only bled the one.
So that's 4 times on 6 pair of hydraulic brakes in 16 years, 3 were for installation/removal, 1 for a broken hose
which was my fault since it went from an 18.5" to a 19.5" frame and was really too short but i was to lazy to fix it (until it broke).
That's why I like hydraulic brakes I find they need very little maintenance, other than adjusting caliper/pads.
I ride my bikes every day I can (even in the winter -20) so I was going to say maybe your back pads are worn, but at 2hrs a weekend,
unless it is all downhill I doubt they are.
Last edited by gbg; 04-27-12 at 07:16 PM.