Rear brake kaput again, Rivale ABS Ď14 - MVAgusta.net
 
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post #1 of 5 (permalink) Old 10-06-2017, 03:53 PM Thread Starter
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Rear brake kaput again, Rivale ABS Ď14

Right a small update on brake issue which I mentioned in one of my first posts:
Iíve put on around 2k km since the 12k service in August, where I pointed out to the dealer that the rear brake was more or less dead. They aired it and it worked pretty well, for a couple of weeks. Now itís only marginally better than when I bought the bike. Low speed stops have to be handled with great care and one finger, since the front works exceptionally well!
What to try next??
Clean out the calipers? Air again? Braided hose, then new pump? It seems to me as since thereís no evidence of leakage and thereís been a progressive loss of power since airing that air is somehow being re-introduced into the system...



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2014 flat-bar, naked F3-like thingy with mx-style rear
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post #2 of 5 (permalink) Old 10-06-2017, 04:05 PM
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I've noticed that it is easy for level to be low but appear to be OK. The rubber bladder in the reservoir lowers down and makes it look like the fluid level is high. Refill that reservoir and make sure that rubber bladder is folded back to normal position. Fill to the higher end. A few pumps of the pedal and the air should naturally bleed out for the most part. But it might also require a rebleed.

Mine was going dead every time I did a wheelie. I cover the rear brake but don't use it. Looked like OK rear fluid level but after opening it clearly was not. I have ABS as well. There is a technical service bulletin on bleeding ABS in case you are doing it yourself.
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post #3 of 5 (permalink) Old 10-06-2017, 04:23 PM Thread Starter
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Thanks for the tip- Iíll give it a crack


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post #4 of 5 (permalink) Old 10-06-2017, 04:47 PM
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There is a modification using the F4 rear brake shield. Check the Tires, Suspension and Brake sub forum for the post.
Also, there is a service bulletin on the MV Agusta website for recommended bleed procedure.

http://net.mvagusta.it/article_attac...ment_view/2966

I had same issue on my F3, once I did the heat shield modification and bled system according to bulletin my rear brake was much better.
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post #5 of 5 (permalink) Old 10-07-2017, 03:11 AM Thread Starter
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Thanks for the pointers, been reading up on the solutions, including installing nipple banjo bolts. It sounds like those whom have performed the mod and bled the system have experienced improvement, but I wonder to what degree, and does the fix appear to hold over time?


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