F4 Gen 2 rear brake solution ... - MVAgusta.net
 
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post #1 of 5 (permalink) Old 05-04-2019, 06:17 AM Thread Starter
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F4 Gen 2 rear brake solution ...

Is there a permanent fix to the useless rear brake? I had a new master cylinder under warranty a couple of years ago but still find myself constantly bleeding the rear brake to stop the lever hitting the stop.


I'm thinking of buying new rearsets and mounting the MC to that to keep it away from the heat .... anyone tried this?


If not, what solutions have you tried that have worked (or at lest helped)?


Different fluid?


Heat shield?


I appreciate that bleeding is not exactly difficult and I don't use the rear brake much (really only if I have hit a corner too fast) but I want it to work when I need it.

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post #2 of 5 (permalink) Old 05-04-2019, 08:25 AM
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I've used higher temperature rated brake fluid with pretty good results.

2016 F4RR
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post #3 of 5 (permalink) Old 05-04-2019, 08:29 AM
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Lots of discussion of this in the first generation... nothing has really changed. The exhaust pipes are close to the master cylinder, and sitting in traffic allows a lot of heat soak.

Heat shielding between exhaust and master cylinder and high quality brake fluid are the best countermeasures.

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post #4 of 5 (permalink) Old 05-04-2019, 08:54 AM
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Could be a tiny air leak at the washers. I have been told that rubber in a spray can =Flex Seal? works like a charm. Haven't tried it myself but sounds good in theory . He said spray the washer itself on both sides(very little amount) then install.
post #5 of 5 (permalink) Old 05-04-2019, 06:24 PM
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I think the heat shield between the pipes and Master is too small, at least on the older models. So I made a larger one to block more of the heat. Only been one year but it seems to have worked. But I also hardly ever use the rear brake.

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