Hi all, I have a single disc 750ss and was wondering if it was worth getting a twin disc set-up? I have seen various bikes bikes being broken with twin discs, so would that be an option? Would I need a different front wheel? To be honest the bike is not raced or thrashed, so it would be more of an aesthetics (vanity!) upgrade.
it would be straight forward if you wanted to, same wheel and you have the redundant fork fixing as you know. You can even use a caliper and disc from a Cagiva Mito if a good set comes up. Master cylinder might be the biggest outlay.
IME well worth it for the initial bite that a single disc can’t match on a bike of this weight. One day it could give you the extra space between close shave and hospital food.
and a disc . Not sure if you saw my earlier post Sev, I’ve done it a couple of times using Cagiva Mito even, same caliper, same disc and really lucky that the standard Mito chose the right-hand fork leg. . Interesting about the PS 13, my memory is shot but had a feeling the bore or stroke was different for two slaves instead of one?
KTM caliper and master could be an option too........I can't recall which model, sorry. But new KTM parts were about half the cost of Ducati.
Hospital food can be very good! The Vale Hospital in Dursley (where I was a 'guest' for some weeks!) uses Apetito https://www.apetito.co.uk. It's very good!
no, as said, the little cover will reveal the presently redundant caliper fixing on the R/H fork leg.
The 750SS single disc brake master cylinder is a PS13. The 900SS twin disc brake master cylinder is a PS15. Bore diameter 0.512" and 0.59" respectively. As the calipers and discs on the twin disc set-up of both the 750 and 900 are the same; the applied logic is that the OP needs a PS15 master cylinder.
Those lovely white wheels will be a lot harder to clean with a disc on the right... just a thought. Personally I would do 4 pad caliper & master cyl upgrade, may give the same braking with less mass. I know you stated this would be an asthetic upgeade.
And it is crucial that you change the master cylinder, back in the day people used to mod CB750 SOHC’s and then complain that the mod was useless, it’s because they failed to change the master cylinder, I did the mod on mine and used a Fireblade master cylinder, the result?, I can chirp the front tyre at 30!.
I did this over 20 years ago to my 750ss and have never looked back. You can get away with the smaller, single disc m/c but the upshot of all that is that you end up with a lot of lever travel, which is less than ideal. I even did a trackday with the lesser master cylinder, without issue, but the proper one is better. You won't be able to do the 4 pad caliper upgrade without some adapter plates for the fork bottoms, because you should have 40mm spacing between caliper bolts, and the later calipers are 65mm spacing. There seem to be more early white frame and wheels SSs coming out of the woodwork these days. I've owned two of them, the first one VIN ***0132 was stolen form my flat in High Wycombe over 20 years ago. The other I still have, but it only gets out occasionally these days. I'm looking to change that this year.
