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Rear Brake cylinder.

Tuono713

Tuono713

Joined Jan 2010
4 Posts | 0+
Hey guys, I have a 2007 tuono and have a problem every now and then with the rear brake going soft and the end result being that I lose the rear all together after riding for a little while. Wondering if anyone else has had this problem before. Thanks
 
Thiers that much torque on a big twin especially a Tuono the back brake doesn't get much use. Twins are a whole different bag of chips compared to il4's etc. Don't know if you've had a twin before mate but you will start to use the gears different with experience. One of the things I love about the T is the way they carry themselves around bends, you just know you have the power to blast out if you approach and exit in the right gear. :eek
 
Brembo rear MC's are garbage. Ducatis and Prilas are renowned for having less than uselessback brakes.
 
I'm told that the rear brake fluid tends to get too hot from engine heat,some have evem melted,I think that there is a relocation fix.
Check with James or Charles at seacoast sport cycles in Derry,NH.
 
if you search af1 forum you will see several fixes from hanging something heavy on the lever over night to how to properly bleed the rear. I have never noticed because I have no use for the rear brake. The only time I touch it is maybe at a stop light to hold me on a hill
 
I sometimes have mine on an Abba stand overnight and when I do, I wedge a sparkplug socket between the stand arm and the rear brake pedal. This gives me a rear brake for a few days. :thumbup

Supposedly fitting aftermarket rearsets where the m/c is mounted behind the right peg sorts the problem. :dunno
 
I got a bit of wd on it so took off and cleaned then rubbed any glaze off with a piece of wet/dry . No after effects.Every now and then I will break hard ,rear only. It does work along with the engine
 
(As Troyboy says)On the AF1 forum you will see a method of bleeding by a guy called zmille. Do a search on eitherthe 2003-5 tuono forum or the Mille forum.

I used it but whilst providing the best method of bleeding it did not fully resolve the problem for me. In the end I got a set of rear sets that moved the master cylinder to the rear set then routed the brake hose in a simple curve inside the swing arm. I have never had to bleed the brakes since except when refreshing brake oil (once a year) and the rear brake has been solid.

I had to add a pressure switch for the brake light.

My view is that the rear brake hose run is basically a crappy design. Its routed very close to the exhaust and has multiple places where gases (split from the hot oil) can gather.

Its true the rear brake is not one to use the majority of the time but its nice to have one for when road conditions turn slippy for what ever reason.
 
I have been trying to convince myself that I need a set of Sato rearsets to cure this, as they relocate the master cylinder:yes. Sadly Bikesinmud over on AF1 has done something similar on his rather georgeous Tuono "Nera" Factory" and reports that his back brake is pants.:no

For myself it's too early to tell on the Factory, the Tuoldo never had an issue, but Liz's 07 suffers from back brake fade over time.
 
V60Paul said:
I have been trying to convince myself that I need a set of Sato rearsets to cure this, as they relocate the master cylinder:yes. Sadly Bikesinmud over on AF1 has done something similar on his rather georgeous Tuono "Nera" Factory" and reports that his back brake is pants.:no

For myself it's too early to tell on the Factory, the Tuoldo never had an issue, but Liz's 07 suffers from back brake fade over time.
Click to expand...

lol...I've been looking at rearsets...for the same reason...

personally, I think the whole rear braking system is flawed...but sadly it'll take a few fatalities before aprilia/brembo sit up and do something about it...
 
I was reading somewhere that re-routing the pipe helps :dunno

I considered Gilles rearsets, but they only do black/gold/titanium and I dont think the gold will match the Factory frame. I would get the frame etc. done black, but its probably going a bit far on a brand new bike.
 
Cheapest sets that do this seem to be th Robby Moto sets. Griff (Fuse box) does a very nice set hat achiev the same thing. When he fits them he routes the hose along the original channel under the swing arm. This is the tidiest method but IMO it still leaves a complex hose route.

P8240783.jpg


My routing is not so tidy but is totally devoid of gas traps and no where near the exhaust. ( I have since run black brading over the hose). There is a bleed nipple on the master cylinder so I put the pressure switch on the slave.

rearbrake.jpg
 

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