smokindave has got this right. Once you have that sticking OEM Sintered brake dust on your pistons, your pistons do not retract. You relay on the outer dust seal to pull the pistons back in. Once you have a buildup your pistons do not retract. Top of the line Brembo race calipers with Titanium pistons do not have dust seals so the team must clean the pistons every race. I have said many times to (OEM Sintered )clean your dust out with a tooth brush or what ever every 2,500 miles to keep them operating correctly. This is a bike that the owner neglected to clean the pistons. It has 7,500 miles. I do not care what anyone does because it is not my bike or my life. I am not the brake police but I do know what I am talking about. You never need good brakes to the end anyhow!



How To Install Brake Pads & Caliper Maintenance
<li style="font-family: Verdana;">Brembo 2008 ~ Current Brake Maintenance Guide PDF Download<li style="font-family: Verdana;">Twin Cam 2000 ~ 2007 Brake Maintenance Guide PDF DownloadTwin Cam Brake Caliper & Control Illustrations Guide PDF Download

 

The rotors you have may not have the springs to keep them against the outside of the carrier or if you pull the c clips the springs may be broken and you have to replace them. The spring is for the noise but are unnecessary for operation.

Paul from Lyndall can no longer sell the MMC rotors, his are only Stainless Steel made in China <QUOTE>: The APEX Performance Rotor is an ultra-light friction ring fully CNC machined from functionally gradient metal composite material and is fitted to a 7075 T6 billet Aluminum carrier with 16 mm Aluminum buttons. The entire 11.5” & 13” fully floating rotor weighs 1.8 pounds. <QUOTE> They do not sound like anything. They have a coefficient of friction of 0.6 whereas Iron has 0.6 and Stainless Steel has 0.5. Of course brake pads make a difference also. These are my 13" rotors with Brembo monoblock (made with one piece of aluminum for stiffness) calipers.


A floating rotor can move a 0.100" side to side but can not move forward and backwards. They self center in the brake pads and are most useful when the rotor gets hot.

 

+1 - your pads will also wear evenly when you do this, also grease sliders on calipers

If you don't have a floating rotor, DO NOT unbolt the rotor from the wheel, it will be warped if you do.

 

Wholly buckwheat. This forum rocks.

I'm getting a serious (and free) education after starting this thread.

Keep it coming please - good stuff!!!!!!!!!!

Still 50/50 on what type of rotors to get for my stock OEM '05 ultra.

Thanks.
Dave H. Appleton, WI

(Go Packers - Philly cheese steaks for us tomorrow

 

I give HD a pass on this one. Although there's no side to side movement, they are a two piece rotor/carrier unit connected by button fasteners. If you really cook the brakes, the rotor can heat up and expand without warping the carrier. This works for street riding. I am pleased with the HD floaters I had installed when bike was new. They are smooth, no pulsating at the lever and look great!

 

Guess I must be an easy going rider, never had any troubles with the brakes over heating. Like what I hear about floating disks, but seems like more small parts to cause problems. What is the gain of having more pistons per caliper in stopping power? Have heard the same pressure is applied regardless of how many pistons the caliper has. Not looking to hi-jack this thread, just thought it might apply.

 

Unsubscribe.

 

Bought new Brembos(not harleys)and floating rotors from Howard at motorcycle metal,he had them powdercoated black for me, they look and perform great, man knows his stuff.

 

Huh, I don't get it????