Ducati Monster Forum

On the 2v sbk, I'd like some educated opinions about deleting one of the caliper carriers off the fork, the caliper and obviously the rotor as well.  All in the name of saving weight off the front end.  I've even considered a single CMC rotor  ;D

We obviously want as much brake as possible, however when you start drastically lowering the weight, you don't need as much.  Just not sure if 300lbs is going to be low enough to get away with it.

I was/am going this to my Monster w/cmc. 

I've been advised that as a street bike shouldn't be an issue.  (some monsters come that way).  Issue with race bike is brakes overheating and then fading.  It might work but then again fading/failing brakes wouldn't be a good thing racing. 

Quite a few of the KTMs are one discs. The one I tried wanted me over the bars all the time. They are about the same weight, so you should be fine. Maybe not really a need for CMC at all, but you want one for bling, don't you? 8)

My 750 came stock with one 320mm disc and a 40mm mount goldline and it was plenty powerful for the street and I never had any fade issues.  That said there's obviously a difference between what a 750 will require and what a 1000 will.

When I can scrape together the moola I wanna run 1098 rotors on my bike, a single 330mm from a 1098/1198 might help you offset the power difference from a single caliper setup a little more.

Are you going to machine a new fork lower to delete the carrier?

Don't want the CMC for bling, want it for the weight savings over the stock rotors.

I'd either machine off the caliper mount (on the cast lowers), or if I end up selling those 999r forks, I'll use a set of R&T forks that have billet (and removeable) caliper mounts.

I need to weigh a caliper, rotor, and estimate the weight of the lower.  I'm thinking around 7 lbs, but might be way off.

Is the caliper mount in a position where you could easily turn most of it off in a lathe?

A single rotor can easily handle a 300lb bike. Let us know when you get there.  :D

I am running one rotor caliper on my 900ss and there is very little difference between 1 and two. There is just a little loss of initial bite but you can still get the front wheel to squeal right on the threshold of grip. The biggest change was loosing 3 pounds of rotating mass off my front wheel, front gets light much easier now. Stock rotor weiged in at 3.2 lbs caliper at 1.1 lbs, plus the weight of the brake line.

One thing that was night and day was when I rolled the bike down my street and pulled the front brake and nothing happened. I run an Ap racing adjustable MC (radial), and had it set close to the stock ratio. With only one caliper pulling the lever would not push the pistons on the one caliper. Had to dial the master cylinder back about 20 clicks before I started getting braking back to 2 caliper levels.

If you want to do the swap and run a radial MC you might want to look into either the AP adjustable or an 18x16 like brembo sells for motard or ducati clutch side.


Next thing to do on my bike is to swap over for an Axis iorn rotor to loose a bit more weight, cant quite spend the $ for the CMC one. Best part of this conversion is the face that you only need to buy one rotor though.

I've got the RCS master...unknown if I can adjust it to work with one caliper or not.

Sounds like a dare from Kopf... [laugh]

I would think this is some sort of answer...

http://ducatimonsterforum.org/index.php?topic=38702.0;topicseen (http://ducatimonsterforum.org/index.php?topic=38702.0;topicseen)

Great...there goes my 300lb wish lol [laugh] [laugh]

I will be setting each item on a scale, writing it all down, and then taking a look (several) at each piece to see where I can save and by what.  It ought to be a fun build regardless of how close (or far away) I am from 300lbs.

i really like this idea.

does the old monster with the single disk have a 25mm axle?

I've wanted at least one CMC rotor since I handled one at the BrakeTech booth at the LBMC show a couple years back.

A 4-pad caliper and one of those would be an awesome combo.

Jeff at BrakeTech won't recommend it, but I'd sure like to try it.

They switched to 25mm at some point(around '99?), there are skinny 3 spoke brembos with 25mm axles. 

i was thinking more about the lower on the fork with no caliper.

The single caliper bikes had a mount for the caliper on the side without.

Machine it off, to save the weight....... [cheeky]

not all of them.

Ok so my m600 doesnt have the same kind of power. But i have a single disc with normal caliper and a master meant for 2 discs..i also have kevlar  lines.

It makes the braking awesome.  I'd guess that the lighter rotor and the radial caliper/master would more than make up for the powser difference on your bike.

you won't need to worry about it being under braked.

My seat of the pants experiences owning a Duke II (conventional master, 300 lbs, single disk) and an m900 (400 lbs, dual SS full-floaters) tells me a few things:

Stopping power is more than adequate with both.
Neither one has every shown any evidence of fading.
Much lighter braking feel (one 1/2 finger) on the dual disk set up than on the single disk(2-3 fingers)
More initial bite and pressure applied is far more linear with the dual disk set up.

Both have the exact same calipers, pads, rotor diameters and brake lines.

So at least from what I can tell, a single disk will stop you just fine, but I'd miss that light and linear feel I get from the dual disk set-up.

However, I am comparing full floaters to semi (i.e. NOT ) floating disks and the masters are different.

I am planning on getting an iron full floater for the Duke and if you don't mind waiting a few weeks I could give you a true apples to apples comparison (well, except for the masters) once I've set it up.

Personally, I think the weight is minor (especially with braketech rotors) and while it is unsprung weight it's not like it's rotating (much) mass. And I really prefer the feel with the dual rotors.

Thanks Monkey!

3.5lbs of rotating weight to just take off is huge (and cheap).  When you are going for as low as possible, EVERY little bit makes a difference (ounces here and there).  I don't have a caliper at the moment, but machining the wheel, fork lower, no caliper, no second brake line, no rotor bolts, no rotor....I'm guessing ~10lbs total.

I'm looking at every angle I can, and currently (an anxiously) awaiting an email back about a monocoque tail section w/dummy fuel tank to rid the subframe and heavy tank from the bike.

Te Nada.

Just promise me you won't go with a non-floating single front disk.

Or better yet, go with one of these so I can be truly jealous :)

(http://www.isrbrakes.se/images/products/t_22-042-OA.jpg)

FWIW...I've seen fairly light track only bikes overheat single brake set ups.

The bikes stopped fine until the caliper and rotor started smoking.

hmmm....i think i was holding one of those the other day in a_m's garage...  as if he needs even *more* bling on his 900

^^^ This is what scares me the most about a single disk set up. Even the best single disk isn't going to shed heat as well as a dual disk.

Works for Buell.   [roll]

Yeah but the surface area on those crazy perimeter brakes is way more than on a conventional disk.

Surface area (and a few other minor factors) = Heat shedding ability

go up to the SBK 330 disk

CMC for me...  I need to speak with a brake dude tomorrow.

I don't believe they create as much heat as a single Brembo to start with.

Brakes have to work to make heat. [evil]