is there any upgrades I can do to improve my rear brakes. They feel almost useless to me and fade out really fast.

 

Lyndall Z-Plus pads were a great improvement for me

 

Is there a rear caliper upgrade?

 

Z Plus pads were an improvement on the front, jury is still out on the back. After experimenting a bit I think my problem isn't so much the rear brake itself as it is the geometry of the pedal in relation to my leg and the air cleaner. I have to make a conscious effort to really press in tight to the air cleaner with my leg in order to get good purchase on the pedal. I really need to figure out the best way to extend that pad out just a bit.

 

+1 on Lyndall and you can now get them on Amazon.

 

Another vote for Lyndall brake pads. Just ordered a new rear set. Get them from Hogpro. Best price, free shipping, and they are a site sponsor. Nice folks to deal with. You might also consider a floating brake rotor if your bike did not come with one...They dissipate heat better for less fade.

 

EBC sentered on mine. They grip really good and are rotor friendly

 

Does anybody have any experience with the hhi or pm 4 piston rear calipers?

 

We have most Lyndall Z Plus pads in stock. I dunno, I never use my rear brake unless I am about to die. But you might want to try bleeding the system as well as if there is air in teh system the pedal will be soft.

 

I have not been here that long, but I don't recall anyone feeling the need to upgrade the rear caplier.....
The front does most of the work, so I don't think the rear need to be that strong. If you can lock up the rear tire with stock components, I can't see what improvement high performance calipers would add.
Pads, bleed, ride like hell