M750 Scrambler Project

[koko64]

Cool mate. Hope you're having a good one.
Any MTS? 34mm pistons?

[Duck-Stew]

Cool mate. Hope you're having a good one.
Any MTS? 34mm pistons?

A good way to see which bikes run the larger pad rear caliper would be to get the part # for the bigger pads and track which bikes use them.  Only reference that I *know* is the larger is: 1999 SuperSport.

[koko64]

Cheers

[Speeddog]

Cool mate. Hope you're having a good one.
Any MTS? 34mm pistons?

It's going alright, thanks!

It's a P34 caliper
Likely a Brembo 20.B852.30
Running the Ferodo FDB2074P pads

The wide pad calipers are available in both 32 and 34 piston.
It's fundamentally a better caliper, bleed screw is on the opposite side of the caliper from hose end.

Allegedly, these have the big piston:

Ducati ST2 1999-2000            Aprilia ETV 1000 Capo Nord 2001-2003
Ducati ST3 2004-2007            Ducati 1098 2009
Ducati ST3 ABS 2007            Ducati 749 2004-2006
Ducati ST3 S ABS 2006            Ducati 749 Dark 2005-2006
Ducati ST4 1999-2003,2005            Ducati 749 R 2003-2006
Ducati ST4 ABS 2003-2005            Ducati 749 S 2004-2006
Ducati ST4S 2003-2004            Ducati 848 2009
Ducati SuperSport 1000 2006            Ducati 999 2004-2006
Ducati SuperSport 1000 DS 2005            Ducati 999 R 2004-2006
Ducati SuperSport 1000 S 2003            Ducati 999 S 2004-2006
Ducati Supersport 620 S 2003            Ducati Monster 1100 2009
Ducati Supersport 800 2006            Ducati Monster 1100S 2009
Ducati Supersport 800 S 2003            Ducati Monster 696 2009
Piaggio X9 125 2000-2002            
Piaggio X9 180 2000-2002            
Piaggio X9 250 2000-2002            
Piaggio X9 500 2000-2002            
            
            
            
Year           Model      Year          Model
2004   749 Dark      2011   848 EVO USA
2004   749 Dark USA   2012   1100 EVO ABS
2004   749 R      2012   1100 EVO ABS USA
2004   749 S      2012   1200
2004   999              2012   1200 ABS
2004   999 R      2012   1200 S Pikes Peak
2004   999 S      2012   1200 S Pikes Peak USA
2005   749 Dark      2012   1200 USA
2005   749 Dark USA   2012   796 ABS
2005   749 R      2012   796 ABS USA
2005   749 R USA   2012   848
2005   749 S      2012   848 EVO
2005   749 S USA   2012   848 EVO Corse SE
2005   999              2012   848 EVO Corse SE USA
2005   999 R      2012   848 EVO USA
2005   999 R USA   2012   848 USA
2005   999 S      2013   1100 DIESEL
2005   999 S USA   2013   1100 DIESEL USA
2005   999 USA      2013   1100 EVO ABS
2006   749 Dark      2013   1100 EVO ABS USA
2006   749 Dark USA   2013   1200 ABS
2006   749 R      2013   1200 ABS USA
2006   749 R USA   2013   1200 S GT
2006   749 S      2013   1200 S GT USA
2006   749 S USA   2013   1200 S Pikes Peak
2006   999              2013   1200 S Pikes Peak USA
2006   999 R      2013   1200 S Touring
2006   999 R USA   2013   1200 S Touring USA
2006   999 R XEROX   2013   796
2006   999 R X'X USA   2013   796 ABS
2006   999 S      2013   796 ABS USA
2006   999 S USA   2013   796 USA
2006   999 USA      2013   848
2007   999 S AMA Rep   2013   848 EVO
2008   848              2013   848 EVO Corse SE
2008   848 USA      2013   848 EVO Corse SE USA
2009   848              2013   848 EVO USA
2009   848 USA      2013   848 USA
2010   1100      2014   1200 ABS
2010   1100 ABS      2014   1200 ABS USA
2010   1100 ABS USA   2014   1200 S GT
2010   1100 S      2014   1200 S GT USA
2010   1100 S ABS   2014   1200 S Pikes Peak
2010   1100 S ABS USA2014   1200 S Pikes Peak USA
2010   1100 S USA   2014   1200 S Touring
2010   1100 USA      2014   1200 S Touring USA
2010   1200      2014   796 - DMT
2010   1200 ABS      2014   796 ABS
2010   1200 ABS USA   2014   796 ABS - DMT
2010   1200 S ABS   2014   796 ABS USA
2010   1200 S ABS USA2014   848
2010   1200 S Touring   2014   848 USA
2010   1200 S T'g USA   2014   1200 ABS BRASIL
2010   1200 USA      2014   1200 ABS THAILAND
2010   848              2014   1200 S Pikes Peak BRASIL
2010   848 Hayden   2014   1200 S Pikes Peak THAILAND
2010   848 USA      2014   1200 S Touring BRASIL
2011   1200      2014   1200 S Touring D-AIR
2011   1200 ABS      2014   1200 S Touring THAILAND
2011   1200 ABS USA   2014   796 ABS THAILAND
2011   1200 S Sport   2014   796 THAILAND
2011   1200 S Sport US2015   1200 ABS BRASIL
2011   1200 S Touring   2015   1200 S Pikes Peak BRASIL
2011   1200 S T'g USA   2015   1200 S Touring BRASIL
2011   1200 USA      2015   796 ABS THAI SPECIAL THAILAND
2011   796 ABS      2015   796 ABS THAILAND
2011   796 ABS USA   2015   848
2011   848 EVO      2015   848 USA
                         2015   796 ABS S2R THAILAND

[koko64]

Thanks heaps, that's awesome.

[koko64]

With that info I picked up a low mileage caliper from an 1100Evo on ebay. Will update when its on and running. Love this joint.

[Speeddog]

Caveats, etc.:

My above ginormous list isn't necessarily 100% accurate.

The Owner's Manual for the year and model of bike will show basic specs for the caliper, so doublecheck that way before buying.

There may be some way to ID the large piston versions from the usual for sale pics.
I've seen no difference.

It's quite a bit more brake than a 32.
Some folks don't seem to use a rear brake at all, I use it a lot.

[koko64]

With the "scrambler", I'm learning to rely on the rear on the hilly, limestone and gravel roads around here. I'm glad I removed a front disc though, people don't realize how strong Ducatis basic braking package is. Descending hilly dirt roads using engine braking and the rear brake is second nature to you "dirt guys"

With the GLW as pillion, I'm using her 100 odd lbs to make the rear brake more effective on Tarmac like a cruiser. Seems to work well and makes up for the single front disc. It's a very level and stable braking method for two up riding.

[koko64]

Caveats, etc.:

My above ginormous list isn't necessarily 100% accurate.

The Owner's Manual for the year and model of bike will show basic specs for the caliper, so doublecheck that way before buying.

There may be some way to ID the large piston versions from the usual for sale pics.
I've seen no difference.

It's quite a bit more brake than a 32.
Some folks don't seem to use a rear brake at all, I use it a lot.

Evo manual quotes 34mm pistons. Measured the eye to eye spec of mounting bolts and caliper body dimensions to ensure bracket fit and rear wheel clearance. All good. I have spare brake lines.

[Howie]

IMO brake caliper size is just one issue.  Early on I learned yoo can lock the rear wheel.   You just need to alter your ankle angle and press really hard.  Obviously not acceptable for riding a scrambler with a pillion.

[Speeddog]

The Platinum pads aren't super grabby, and they're nice to the rotors and don't grind them off.

So less likely to lock.
Still will lock if one pounces hard on it.

For the dirt running, I use it for spin control, even aggressive street legal tires can't really hold a 750.
My W-headed Gran Canyon with TKC-80's could spin the rear in the dirt at will up to 60mph or so.

[koko64]

Yep, it all requires some finesse .
It wouldnt surprise me if the later type calipers were less prone to sticky pistons and therefore less prone to warping discs. The early type do appear to overheat quite easily.

[koko64]

Bench tested, then fitted and tested a braided line for the rear caliper. Will see how much pedal travel there is with the bigger pistons. Gotta try it on the road.

[koko64]

 20191231_103932 by Tony Kokonis, on Flickr 

[koko64]

I have adjusted the M/C freeplay to a safe minimum in order to reduce the pedal travel for my small size 8 foot. If that doesnt suffice then ill go for a bigger bore M/C.