I have just purchased an 07 FXDWG and don't like the rear brakes - I like to be able to stop.
Has anyone changed/modified there rear brakes and had success in stopping alot quicker?

 

upgrade the front, the rear is not important to help you stop quicker.

 

Whatever you do to improve your rear brake, also do to the front. And if you are riding using your rear most of the time, don't! You can sharpen your brakes up with after-market pads such as Lyndall, also replace the stock hoses with braided.

I find my 13" twin front rotors and 6-pot calipers stop me just fine.....

 

If you'r not stopping quick enough, upgrade the front. The greatest rear brake in the world won't stop you quicker w/o the front upgraded with it.

I barely use my rear even in panic stops...