Ive not had my mille long but when i use my rear brake at traffic lights it locks up like normal but when riding i get nothing will this be solved by bleeding the break?
Nick
Nick
Joined Jun 2009
350 Posts | 0+
It can't hurt can it?
A bleed is deffo the starting point to getting a decent rear brake.
What's it feel like?
Before you bleed, try hanging a heavy weight on the pedal overnight (seriously!) something like a 5litre can of paint...you'll be suprised how it can help...temporarily.
Rear brakes on these bikes are always hit & miss....
When i try the rear brake while moving i can press pedal as far as it goes and get nothing. When not moving i can put a bit of pressure on and it works fine bit weird really. Looks like ill have something to do this weekend :thumbup
Joined Oct 2010
1K Posts | 0+
West Yorks
and what if I don't use it for a while, say a week after applying the 'treatment', will it still be hard for 150 miles when I do use it?
What's the science behind the miracle fix?
Rob
Between now and the weekend, hang a weight on that pedal.....trust me....I'm a doctor
can i hang a tin of paint whilst riding it? will that make the brake work more?
Joined Oct 2010
1K Posts | 0+
West Yorks
can i hang a tin of paint whilst riding it? will that make the brake work more?
I was wondering that too, but didn't dare ask.
Does it have to be in a matching colour to the bike?
Rob
It does seem to have done the job. Even if it's just for today and tomorrow was planning on bleeding it this weekend.
I have a problem with my rear brake. It seems to be a common fault!
When I bleed motorcycle brakes I use a syringe to create a slight vacuum at the caliper instead of just using a container to catch the fluid as it draws out the air bubbles much quicker than just pumping the pedal. Be carefull not to creat too much if a vacuum or the air will be forced pass the master cylinder seals.
It is the seals in the master cylinder which I think are the cause of most rear braking problems and the reason why hanging a weight off the pedal overnight helps in the short term.
I am about to try a new larger (13mm instead if 11mm) cylinder to see what results I get. It should reduce the lever travel as it has a larger piston area and will hopefully have seals that are not made of chewing gum.:inlove.
I will post my thoughts when it arrives, in the mean time if you want one they are part number 10.4776.60 and are about £40-try googling the part number.
When I bleed motorcycle brakes I use a syringe to create a slight vacuum at the caliper instead of just using a container to catch the fluid as it draws out the air bubbles much quicker than just pumping the pedal. Be carefull not to creat too much if a vacuum or the air will be forced pass the master cylinder seals.
It is the seals in the master cylinder which I think are the cause of most rear braking problems and the reason why hanging a weight off the pedal overnight helps in the short term.
I am about to try a new larger (13mm instead if 11mm) cylinder to see what results I get. It should reduce the lever travel as it has a larger piston area and will hopefully have seals that are not made of chewing gum.:inlove.
I will post my thoughts when it arrives, in the mean time if you want one they are part number 10.4776.60 and are about £40-try googling the part number.
Joined Jun 2009
350 Posts | 0+
Good luck with that then.
About 40% of these bikes are aflicted with 'dead brake'
Some of the smartarses think it's all to do with bleed technique.
Four years ago, three dealers thought the same. Main Aprilia dealerships too. They could all bleed it, but the pedal would still go soft after a few hundred miles.
Have tried Kzmilles sysyem, reverse bleeding, mitivacs, the lot. I struggled on for 3 years until I bit the bullet and bought some Gilles rearsets which remount the m/c off the motor.
I bled it (10 mins) and the rear brake has been perfect ever since.
Like I say, if you're affected, no amount of bleeding or fluid changes isn't going to fix it.
Forget high temp race spec fluid too.
The problem is one of cavitation, and if your bike 'resonates' in the zone, then your only permanent fiz is a set of rearsets that relocate that m/c.
It's thought that the compression of thr fluid using the weight on the pedal technique forces air past the seals.
I think rear sets will be the way to go once I've got my yammy sold I think I'll be investing.
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