RSVR Rear Brake Recall

Okay, so most people got their recall letter and probably got a dealer to 'sort-out' the rear brake......Now the Aprilia letter states something like the problem is down to incorrect user servicing....so how come after a mere 5 weeks of having it correctly serviced by an official Aprilia dealer...the back brake is virtually non-existent on my bike???!!
Anyway I'm planning to spend some time in the garage this weekend with the fairings off and a nice sharp drill bit and see if I can't sort the pesky master cylinder issue out:angry Failing that I'll throw some tools around, swear a bit and realise I don't actually use the rear brake anyway:dowhat

NewBoots said:

Okay, so most people got their recall letter and probably got a dealer to 'sort-out' the rear brake......Now the Aprilia letter states something like the problem is down to incorrect user servicing....so how come after a mere 5 weeks of having it correctly serviced by an official Aprilia dealer...the back brake is virtually non-existent on my bike???!!
Anyway I'm planning to spend some time in the garage this weekend with the fairings off and a nice sharp drill bit and see if I can't sort the pesky master cylinder issue out:angry Failing that I'll throw some tools around, swear a bit and realise I don't actually use the rear brake anyway:dowhat

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Whch is exactly what I did. Infact I am amazed mine got throught the MOT because it really doesnt have a back brake.

I am just resigned to this fact now.

I think there is a mod for the read brake. Mine was done by Southercross and the brake works after 2000miles. My bike's a 2002 so don't know whether it was the same problem/solution though. Good luck

Sergi

I tjink it involves boring out the brake reservoir out let and the inlet on the master cylinder.

However this is only a partial fix because the root cause is heat related.

has anyone tried degassing the break fluid before you use it, this is how the breaks on my specialized mountain bike are bled. basically it involves filling a syringe with fluid, pluging the inlet to the syringe and then gently pull the plunger on the syringe back so pulling a vacuum on the fluid. lots of desolved air bubbles appear. the idea is to remove most of these before using the fluid.
if anyone is interested in a more detailed description search the internet for avid juicy 5 breaks and look for the bleeding information. it will all become clear.
removing allot of the dissolved air may improve matters no end. there is also a bleeding sequence on there that utilizes 2 syringes and some hose and allows you to forward and reverse bleed the system and also degas the caliper and master cylinder. may just need some working out with fittings.
http://uk.youtube.com/watch?v=6mg6NbIjmOM . try this i found on you tube make it a breeze to understand
:thumbup

I posted a back brake question the other day, there is a mod invovling boring out the 90 deg elbow and putting a bleed nipple onto the master cylnder, I hae heard good things about this mod, I will be trying it myself in the next few weeks, I will let you know how it performs on my 2500 mile trip to Germany next month

There is only ONE proper way to bleed the rear brake...and there is only ONE proper and permanent solution.

Here is the bleeding procedure:

http://www.apriliaforum.com/forums/showthread.php?t=15500&highlight=rear+brake+bleed

Here is the solution to permanently fixing the problem:

1) For the original mille http://www.satoracing.com/rearsetsrsv2.htm

2) For the new mille http://www.satoracing.com/rearsetsrsvfactorytype2.htm

Robby Moto also makes rearsets that relocate the rear master cylinder.

I'm here to help :thumbup

The whole point of degassing the break fluid is to removed dissolved air which is held within all break fluids. if this is not done as the fluid heats due to the poor positioning of the master cylinder heated by the engine, the air expands, forms air bubbles within the fluid resulting in ***** rear break. remove the air from the fluid before you bleed the system, and it's not there to boil out when the fluid gets hot. Just a question of PHYSICS.