Is your bike setup as good as it can be??

[Lou Girardin]

your mistaken frosty bike aint meant to be comfortable!

That explains sales of TDF sportsbikes.

[FROSTY:Me]

Yes to all except my mirrors can still do with an improvement. Currently I've got GSXR600 mirrors with DIY mounts. Can finally see something beyond my elbows. Still have the originals in the garage.
On the topic of rear brakes, mine have suddenly stopped working after getting new chain & sprockets fitted Haven't figured out why or how to get them working. Shop can't see anything wrong.

The back brakes can only be a couple of things -1 theres a shit load of grease/oil on the disk--unlikely
The pistons have been retracted slightly too far and the return is pulling the pistons too far back -easy fix for that one --Pull the caliper off pump the brake lever once -refit the cakliper--it will be a tight fit.
or there is air in the system -check you have fluid in the resevoir -push down on the brake pedal-hod it down and crack the joint on the caliper -bet the brakes sudenly start working again