Topic: EBC Rotors

[MCRider]

That EBC rotor would be my choice , certainly over mounting a second disc, in which I don't believe, the more after a member wrote recently he immediately took it off, unhappy with the extra unsprung weight.
http://forums.sohc4.net/index.php?topic=64964.msg712087#msg712087

I initiated a thread about a year ago about dual discs. My question related to the holes in discs affecting stopping power. I knew that it didn't but I couldn't remember why. I got the answer which then expanded to a fuller discussion of dual discs.

Essentially, adding a disc by itself doesn't increase stopping power. It takes the available power from the master cylinder and spreads it over a larger surface. THe benefit is less fade, less pad wear, and a more symmetrical feel to the fork, though this is a different subject. We had engineers in the thread with formulas and high falootin math and everything.

More and bigger holes also doesn't change the available power, it just concentrates it on a smaller area...and increases pad wear.

SO I got to thinking, for my riding style, which is fast but not hard on the brakes over and over, wouldn't I be better off going back to one brake, making it as good as it can be with a EBC rotor, pads, and maybe a more powerful master cylinder, which is the starting point of ultimate brake power anyway? Then I can enjoy the lighter front end, and lower maintenance.

If you're doing track days, or outright racing, or just want the look, then 2 discs is right.  But for a street bike, without upgrading the master cylinder and rotor material, is there really much gain?

Personal preference. I'm going to give one primo set up disc a try for my cafe racer.

[754]

Do the EBC rotors rust?

[cb750k77]

i dont think sooo i know the middle is made out of aluminum.... they might though they are made out of standard material that modern rotors our made out of..

[bucky katt]

i have a 14mm master cylinder from a gsxr750, braided stainless lines and rebuilt caliper with stainless piston

[wannabridin]

the EBC rotors are stainless steel, so no rust

[MRieck]

That EBC rotor would be my choice , certainly over mounting a second disc, in which I don't believe, the more after a member wrote recently he immediately took it off, unhappy with the extra unsprung weight.
http://forums.sohc4.net/index.php?topic=64964.msg712087#msg712087

If you thin then down and reduce the OD the additional weight is minimal. The problem with 1 rotor is the strong twisting force it applies to the front end during hard braking. The twin rotor system eliminates most of that.

[MCRider]

the EBC rotors are stainless steel, so no rust

http://www.ebcbrakes.com/motorcycle_brake/pro-lite_replacement_rotor/index.shtml

They may rust a little, but that's OK. The rotors on my FJR are stainless and they rust. Its just less stainless than ones that don't rust.

Cast iron discs rust like crazy and provide the best stopping. I think less stainless is better for braking.

[MCRider]

That EBC rotor would be my choice , certainly over mounting a second disc, in which I don't believe, the more after a member wrote recently he immediately took it off, unhappy with the extra unsprung weight.
http://forums.sohc4.net/index.php?topic=64964.msg712087#msg712087

If you thin then down and reduce the OD the additional weight is minimal. The problem with 1 rotor is the strong twisting force it applies to the front end during hard braking. The twin rotor system eliminates most of that.

Of course thinning is relative. The older Ks had pretty thick discs and could stand a lot of thinning. The later Fs are pretty thin to begin with so adding a disc is still twice.

Granted on the twisting. But a good fork brace takes a lot of that out. In my case I'm building for my riding style (fast backroads) which is to stay off the brakes and be as smooth as possible.

While this doesn't apply to our spindly 35mm forks, my HawkGT has 45mm forks and 1 brake and there is no twisting even without the brace, which i have. Just an info blurb.

[MRieck]

the EBC rotors are stainless steel, so no rust

http://www.ebcbrakes.com/motorcycle_brake/pro-lite_replacement_rotor/index.shtml

They may rust a little, but that's OK. The rotors on my FJR are stainless and they rust. Its just less stainless than ones that don't rust.

Cast iron discs rust like crazy and provide the best stopping. I think less stainless is better for braking.

Ive watched rust form on some Brembo rotors I have while sitting in a restaurant during a rain storm.

[wannabridin]

touche about the stainless.  must just have a the approaching lower limits of chrome, probably like 10.5-11%...  and when you brake, especially if there's gouges in the rotor, you increase the surface area quite a bit, exposing more to potential rust.

MC, are you sure that it wasn't just pieces of the brake pad that were rusting?  i know brake pads have steel in them, and if it's powderized, then it'll rust... 

[MCRider]

touche about the stainless.  must just have a the approaching lower limits of chrome, probably like 10.5-11%...  and when you brake, especially if there's gouges in the rotor, you increase the surface area quite a bit, exposing more to potential rust.

MC, are you sure that it wasn't just pieces of the brake pad that were rusting?  i know brake pads have steel in them, and if it's powderized, then it'll rust... 

I can't say for absolute sure that its not brake pad residue. But from what i know, I would bet money its a lower level stainless which allows rusting after a long time sitting, which mine has done lately. If I rode it regularly, the braking action would clear the rust.

Since the best braking comes from cast iron, no stainless at all, the manufacturers are looking for a compromise level of stainless which will look decent and provide good braking.

Earlier rotors like our CBs have too much stainless, so EBC can easily provide a better rotor with a more modern blend of less stainless.

[wannabridin]

good to know there.  thanks Ron

[754]

I cant help but wonder out loud if the Double Foating brake, is a plus or a minus. Should be able to fab up an Aluminum rigid mount for caliper to save weight, but setup would be crucial as nearly every floating rotor uses twin piston calipers..