Ducati Monster Forum

Moto Board => Tech => Topic started by: memper on July 22, 2014, 11:17:27 AM

Title: Dual rotor upgrade?
Post by: memper on July 22, 2014, 11:17:27 AM
Thinking of doing this on my old 750. However, I noticed that there are only three mounting bolts on the right side of my wheel. Do I need another wheel? Three doesn't seem enough.
Title: Re: Dual rotor upgrade?
Post by: Speeddog on July 22, 2014, 11:36:41 AM
There's 6 holes in the wheel.

They only use 3 bolts to hold that cover on.
Title: Re: Dual rotor upgrade?
Post by: Nibor on July 22, 2014, 07:22:48 PM
Do it!! Great upgrade, did that on my 750 a lil while ago. You'll need (ideally) a larger master from a 900 or something, and I recommend brand name discs. I got Chinese eBay discs, although they looked great and were a great price, the runout was out of tolerance limit when brand new! The manufacturer specs allowed for over double the runout in their manufacturing process, so the game was lost before it began.

No saying others haven't had good experiences with eBay rotors, but I haven't.
Enjoy the awesome braking when it's done!
Title: Re: Dual rotor upgrade?
Post by: hooligan machinist on July 24, 2014, 09:45:19 PM
 A word of caution.
Go easy on that lever until you get a feel for it.
  It will be much easier to lock up with duals. :o
Title: Re: Dual rotor upgrade?
Post by: memper on July 25, 2014, 09:50:15 AM
Word.  Thanks dudes
Title: Re: Dual rotor upgrade?
Post by: Langanobob on July 26, 2014, 12:29:10 PM
It would be very interesting if you made some say 60 to zero stopping distance measurements with the original single disk setup and then again when you finish the dual disk installation. 

I hate it when people make suggestions about things they think I should do.

Title: Re: Dual rotor upgrade?
Post by: Rudemouthsky on July 28, 2014, 08:11:44 PM
Ironically enough I'm going to a single rotor/caliper for my "rat" 750 since I have the parts and want to acheive more lightness for that bike...so if you want my calipers/rotors/and m.cyl lemme know.
Title: Re: Dual rotor upgrade?
Post by: bdfinally on August 09, 2014, 06:29:41 PM
Don't know what it'll cost you to convert, but I got one of these a few years ago

http://ca-cycleworks.com/products/brakes/brake-rotors/btd-10 (http://ca-cycleworks.com/products/brakes/brake-rotors/btd-10)

switched to Ferodo Platinums, already had braided lines and I can't see how duals could slow that bike down better. I had thought about going dual, but advice on here then said lighter weight, last longer and better feel. They were right. Just my 2 cents.
Title: Re: Dual rotor upgrade?
Post by: SpikeC on August 09, 2014, 06:58:40 PM
 What the....... don't stop with 2 discs! Go for 4!!
Title: Re: Dual rotor upgrade?
Post by: Bergweiserus on August 11, 2014, 09:26:37 AM
Quote from: bdfinally on August 09, 2014, 06:29:41 PM
Don't know what it'll cost you to convert, but I got one of these a few years ago

http://ca-cycleworks.com/products/brakes/brake-rotors/btd-10 (http://ca-cycleworks.com/products/brakes/brake-rotors/btd-10)

switched to Ferodo Platinums, already had braided lines and I can't see how duals could slow that bike down better. I had thought about going dual, but advice on here then said lighter weight, last longer and better feel. They were right. Just my 2 cents.


YOU beat me to it, bdfinally!!  I was just about to post that info.  I think you're way better off doing the single, BrakeTech ductile iron rotor with Ferodo pads.  by adding a disc and calipers, you are adding unsprung weight and rotating weight...

with a proper lever you can do i finger stoppies with that setup....
Title: Re: Dual rotor upgrade?
Post by: Rudemouthsky on August 11, 2014, 10:08:50 AM
Quote from: Bergweiserus on August 11, 2014, 09:26:37 AM

YOU beat me to it, bdfinally!!  I was just about to post that info.  I think you're way better off doing the single, BrakeTech ductile iron rotor with Ferodo pads.  by adding a disc and calipers, you are adding unsprung weight and rotating weight...

with a proper lever you can do i finger stoppies with that setup....

I'm still kicking myself for not going this route. Would have had less weight, better quality braking components, and come in at about the same price or less. And have less clutter in front of my Carrozzeria wheels. :(
Title: Re: Dual rotor upgrade?
Post by: Speeddog on August 11, 2014, 12:01:22 PM
Braketech Iron
4-pad Brembo
CP-211 pads
13mm Brembo master

(https://farm4.staticflickr.com/3896/14885548211_c766894be2_c.jpg) (https://flic.kr/p/oFojSX)
Title: Re: Dual rotor upgrade?
Post by: memper on August 11, 2014, 05:07:21 PM
Yeah, I dig the open look from the r side. I was considering just getting a better than stock rotor. Already have the braided line and I use Braking pads.
Suggs on the rotor? Im not looking for fancy, just better than stock with a simple look.
Title: Re: Dual rotor upgrade?
Post by: DarkMonster620 on August 11, 2014, 05:15:37 PM
Not expensive and good, EBC V-Rotors, carriers can be ordered in colour or the regular X-Rotor and EBC pads . . .
Title: Re: Dual rotor upgrade?
Post by: memper on August 11, 2014, 06:49:35 PM
Thanks, I'll look into that.
Title: Re: Dual rotor upgrade?
Post by: brad black on August 11, 2014, 07:35:50 PM
Quote from: Speeddog on August 11, 2014, 12:01:22 PM
Braketech Iron
4-pad Brembo
CP-211 pads
13mm Brembo master

did the 749/999 caliper go straight on?

how do the iron discs fare with sintered pads do you know?  i've always had the ferodo people here put me off the cp211 for road use.
Title: Re: Dual rotor upgrade?
Post by: Speeddog on August 11, 2014, 10:42:06 PM
Caliper went straight on.

Mated with a new Brembo Snowflake rotor that then lasted 24k miles of 70% freeway commuting, 20% rural and fun riding, 10% town riding.

The above pictured Iron rotor went on less than 3k miles ago, with new pads.

My S4 with dual Irons ran Platinums in the OEM 2-pin calipers for 19k miles, then CP211's in 4-pad calipers for 22k miles.

I'll check thickness, but they're not worn much.

I'd have used Platinums in the 4-pads if they offered them.....

The CP211's are a bit less grippy when cold, but nothing dramatic.
A couple stops and they're fine.
Title: Re: Dual rotor upgrade?
Post by: DarkMonster620 on August 15, 2014, 10:12:12 AM
Just a quick question without threadjacking . . .

I have the opportunity to get a pair of 4pot/4pad 999 calipers, how much difference will it be against my 2pad/4pot calipers?

I have the Brembo RCS 18-20mm brake master
Title: Re: Dual rotor upgrade?
Post by: Speeddog on August 15, 2014, 11:41:30 AM
I would say definitely more power, but I've not run the same pad compound in both, so YMMV.
Title: Re: Dual rotor upgrade?
Post by: DarkMonster620 on August 15, 2014, 03:11:46 PM
So you would say " go for it?"
Title: Re: Dual rotor upgrade?
Post by: Speeddog on August 15, 2014, 03:22:45 PM
Quote from: The Last In Line on August 15, 2014, 03:11:46 PM
So you would say " go for it?"

Yes!

You will need a different brake line, as the inlet position on the 4-pads is different.
Title: Re: Dual rotor upgrade?
Post by: Rudemouthsky on August 15, 2014, 03:58:14 PM
Seems like too much braking power for a 620. And a really limited/expensive selection of pads. Then again it might work really nice with the RCS.
Title: Re: Dual rotor upgrade?
Post by: DarkMonster620 on August 15, 2014, 04:26:37 PM
Quote from: Speeddog on August 15, 2014, 03:22:45 PM
Yes!

You will need a different brake line, as the inlet position on the 4-pads is different.
beat you to it ..  . I am offering $150 for calipers + lines  . . . guy said yes . . . ;D

Quote from: Buck Naked on August 15, 2014, 03:58:14 PM
Seems like too much braking power for a 620. And a really limited/expensive selection of pads. Then again it might work really nice with the RCS.
could be but, lots of hills here . . .