F3 rear brake performance - MVAgusta.net
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post #1 of 22 (permalink) Old 10-02-2019, 11:41 AM Thread Starter
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F3 rear brake performance

Maybe it's just my personal opinion, but I feel the rear brake on my 2018 f3 800 isn't the best,
Quite spongey, and needs pumped a few times to improve bite.
My local dealer says all MVs based on the F3 platform are the same, as the heat soak from engine and exhaust effect the rear brake master cylinder.

Has anyone else experience with this? And any advice on improving the rear brake?

Thanks guys.
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post #2 of 22 (permalink) Old 10-02-2019, 12:10 PM
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90% of F3 owners experience this.
The rear brake on F3 is a total nightmare to be honest.

Had my brake fluid change last week done by MV mechanic at dealer.
Rear brake is basically useless. Yes it brakes a bit but dont expect to lock rear wheel up.

Its 'normal' that it doesnt function propperly. Expect it to go bad real quick aswell.

*This counts for models with brake resorvoir up high behind side plate. Cant say how low mounted at brake pump work.

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post #3 of 22 (permalink) Old 10-02-2019, 01:03 PM Thread Starter
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Originally Posted by Black_Gold_Saw View Post
90% of F3 owners experience this.
The rear brake on F3 is a total nightmare to be honest.

Had my brake fluid change last week done by MV mechanic at dealer.
Rear brake is basically useless. Yes it brakes a bit but dont expect to lock rear wheel up.

Its 'normal' that it doesnt function propperly. Expect it to go bad real quick aswell.

*This counts for models with brake resorvoir up high behind side plate. Cant say how low mounted at brake pump work.
Well that sucks haha
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post #4 of 22 (permalink) Old 10-02-2019, 01:36 PM
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The lower right foot operated wheelie control pedal works well enough to prevent looping out. Does it have any other function?
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post #5 of 22 (permalink) Old 10-02-2019, 01:55 PM Thread Starter
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The lower right foot operated wheelie control pedal works well enough to prevent looping out. Does it have any other function?[IMG class=inlineimg]https://www.mvagusta.net/forum/images/MVagusta_net_2016/smilies/tango_face_wink.png[/IMG]
On previous bikes I liked to use the rear brake alot, mostly for slow/tight manoeuvres
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post #6 of 22 (permalink) Old 10-02-2019, 03:53 PM
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Yep, my 2018 Euro 4 model F3 (I believe they changed the location of the reservoir for these, according to MV dealer at service time) is also pants. I've bled it with about 500ml going through it a few weeks ago, it lasts for a day (great at first) but by the end presses to the floor faster than Osama bin Laden used to, with as much effect as Gretna Thunberg on turning Jeremy Clarkson into a Greenpeace ambassador.

Now, after use and when parking it up back in the man cave, I pump the brake and hang a 5L tin of paint off the lever. Seems to work, I just accept it as one of the idiosyncrasies of owning a non run of the mill bike. I know it's unacceptable, especially for the price, but hey ho. I can put up with it.

I will experiment with heat shields over the winter, and some fluid once suggested on here somewhere (Putoline I think, grade 4.0 but rated to 5.1??? I'll have to trawl the archives but it was 9nly in the last few months it was suggested)
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post #7 of 22 (permalink) Old 10-02-2019, 05:09 PM Thread Starter
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Yep, my 2018 Euro 4 model F3 (I believe they changed the location of the reservoir for these, according to MV dealer at service time) is also pants. I've bled it with about 500ml going through it a few weeks ago, it lasts for a day (great at first) but by the end presses to the floor faster than Osama bin Laden used to, with as much effect as Gretna Thunberg on turning Jeremy Clarkson into a Greenpeace ambassador.

Now, after use and when parking it up back in the man cave, I pump the brake and hang a 5L tin of paint off the lever. Seems to work, I just accept it as one of the idiosyncrasies of owning a non run of the mill bike. I know it's unacceptable, especially for the price, but hey ho. I can put up with it.

I will experiment with heat shields over the winter, and some fluid once suggested on here somewhere (Putoline I think, grade 4.0 but rated to 5.1??? I'll have to trawl the archives but it was 9nly in the last few months it was suggested)
Amazing reply ever.

Tbh I've already ordered an aftermarket slip on exhaust to try and defect some of the heat, and while I'm in about that area I might see what I can do with some heat reflective material.

I'll post back in the future with my results.

But I totally agree... For the price you pay for a new f3 a working rear brake would be lovely
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post #8 of 22 (permalink) Old 10-02-2019, 06:17 PM
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Not just F3 related.
My mechanic said its Italian related xD

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post #9 of 22 (permalink) Old 10-02-2019, 10:16 PM
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I can lock up my rear wheel with the brake pedal. Is it particularly aggressive? No, but it will make the tire skid if I try.

The front brake is the primary agent for slowing down from speed. Rear brake is really only a chassis stabilizing agent or anti-wheelie device. Unless you are on a Harley or other heavy weight cruiser.....

If your brake fluid is good, your system is bled properly, and you have good brake pads....the rear brake will work as it should.

I used to be fast....now I just dream about it.
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post #10 of 22 (permalink) Old 10-03-2019, 09:16 AM
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yup. totally useless brake on the rear. on my 2015 f3, my rear caliper, just out of nowhere, cracked in two while i was out on the track and puked its oil all over my rear wheel, despite like never using the rear brake! put a new brembo on and it's just as useless...

2015 F3 800
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