Linked Brakes

Hi AllI’m in the process of relinking the brakes on my current T3 project which has a lot of weired and wonderfull mods, some of which are quiet good.For the life of me i cant remember where the manifold unit goes, i know its on the nearside but where does it fit? any photo’s would be helpful.Dave

Next to the rear damper (top)

If its the same as the spada it fits left side at rear on the riser tube just behind the side panel
basicall behind that tube and in front of the shock absorber

There should be a wee bracket there if you look

Thanks to allDave

The Spada brake splitter is slightly different but this is where it sitsThe pipe out of the bottom feeds the rear disc, a rigid pipe comes out of the back and runs up the frame towards the front left disc, the other pipe goes to the master cylinder.

Don-Spada2012-06-07 21:46:18

Yep that’s the kiddie.

T3 one in the same place but smaller and behind the bracket, by the way check the elektrikery connections every 6 months they do get alot of crud had one that was hanging literally by a thread, Mind you it would not actually fail an MOT older bikes only need to have 1 brake light switch working???

Just received anew switch after the connections broke / rotted off my last one. I found a spare one that screws directly into the mastercylinder using a banjo on the brakeline. This will be going on the rear master cylinder under the sidepanel, away from the muck so it will.


Oh yeah Moto Guzzi gurus… are the large proportioners for a rear P9 and the small for the P8?

xtheone&onlymin2012-06-08 18:34:32

Hi Min Yes the larger unit is a proportioning valve fitted to the Spada. which also has the P9 caliper. This is supposed to do clever things between the front and rear discs. The smaller T3 unit is just a junction box and each disc gets equal pressure.I do recall reading somewhere that the Spada has a smaller rear disc to help balance the braking pressure but would not be sure of that one at all at all.On the subject of things corroding in that area, the rigid steel brake pipe that comes out of the back of the splitter catches plenty of road crud and can rust.

Don-Spada2012-06-08 19:55:45

It was on here a week or so ago about the smaller rear disc. Are they all not smaller than the front and therefore the caliper can’t exert as much leverage on the turning momentum stuff than it could on a larger diameter disc. That is why the P9 is a bigger pistoned caliper. The Spada would need a different brake plate etc to adjust to a smaller disc than the rest of us have. Blah blah blah etc
I am stainless all round no no probs there.


Yes but it’s the back brake one that has to work.

Or was. So-o, same problem…

Good heads-up about the connectors though, despite the rubber bootee cover thngy these still cop all the crud off the rear tyre

I wrote another post about this, it aims for 50 - 50% distribution of braking forces front - back for low pedal pressure, (linked system only used), shifting to more onto the front as you press harder. There were “non-standard” pad compounds involved as well though IIRC.

The smaller T3 unit is just a junction box and each disc gets equal pressure.
I do recall reading somewhere that the Spada has a smaller rear disc to help balance the braking pressure but would not be sure of that one at all at all.

No it isn’t, same as my LM1 rear anyway. Well they were an exact swap, shall I say.

all that happens is the spada system has a piston in it.
Once the rear brake is on it is pushed up and puts the front on.
When you release it lets the front off first.
Very simple, very clever, very effecive.
With practice you can just use the rear.

It’s like a little rubber grommet thingy that closes off the passage to the rear caliper as it’s pushed, I took one apart to replace same, it gets deformed with use and stops working.

Ah thankyou.

You’re welcome.

It’s not that sophisticated TBH.

No it’s a Guzzi.

Talking about Brakes, I have plain cast discs on my Guzzi MarkII/I all I’ve sen have drilled, where the cast discs original fitment?

Original fitment on the Le-mans 1 & 2 were drilled cast iron discs. T3 etc had undrilled cast iron discs.And welcome as a new member of the forum Where abouts are youAnd don’t forget we love pics of yer bike