Difference in brake performance 2015rr

[Thefridge1980]

Hi there
Not sure if this has been covered, I've heard a few people talk of brake fade on stock bikes, I've also heard that the mp4 didn't suffer as much, is this all talk or anything to do with physical difference and forged wheels. I have a 15 plate with forged wheels and it had its discs replaced due to being warped by the dealer just as I bought it. If I take the bike on the track am I likely to experience any issues. This is more of a sanity check to see what people have actually experienced really?

Loving the bike aside from this nagging thought. All help appreciated.

 

[fast_ryan]

Brakes

There isn't really any issue with the front brake unless pushing extremely hard on track at which point you may experience a little bit of brake fade. The discs on the HP Forged Wheels are very good as are the standard front brake pads. Most will fit aftermarket front brake pads when they are in need of replacement as the BMW OEM brake pads are expensive. I've not had any issues with the front brakes either with OEM brake pads or race brake pads fitted. My only dislike is the type of Brembo calipers that BMW choose to fit as brake pads are extremely expensive due to the design.

 

[alex]

The HP4 has a different/better caliper, with ironically a cheaper pad replacement cost. They also got 'better' discs too.
Most braking performance issues are down to pad choice.


- Sent from Mobile

 

[Alps Pacino]

I ran my bike with a complexly standard brake set up. Brakes lasted about 4 laps into a race then faded off badly. I then replaced the front pads with brembo Z04 and fluid with castrol SRF and they are now perfect.

On another note, what people think is "warped discs" is normally an uneven build up of pad material on the disc face. I've cleaned up loads of "warped discs" over the years and all have magically been straightened by the use of a wire brush and some brake cleaner.

 

[fast_ryan]

Castrol SRF Brake Fluid

I am yet to find any brake fluid that is better than Castrol SRF. It might be expensive but it makes such a hugh difference on track.

 

[alex]

SRF's only draw back is that it's more hygroscopic (water absorbing) than others which means it has a shorter lifespan in the brake system. But that's not a big issue if you're doing track work mainly, as you're probably more likely to cycle through the fluid.

RBF600/660 from Motul is my choice mainly cause it's a bit cheaper - still has a high boil point and lasts a bit longer. I also don't push my bike as hard as others.

 

[bananaman]

Never had a problem with oe discs on my '10 or now my '15, but I do clean them regularly. Both mainly used on track, now using the z04's at an extortionate price but they are really good and last longer. As Rys said, it's a pi$$ off that they are twice the price of the HP4, not compared but have they less pad material than the 1 piece on the HP4? Only problem I've had with the brakes is binding (on my '10 and showing signs now on my '15), no amount of cleaning solved the problem until I fitted a new piston kit.

 

[pof]

I ran my bike with a complexly standard brake set up. Brakes lasted about 4 laps into a race then faded off badly. I then replaced the front pads with brembo Z04 and fluid with castrol SRF and they are now perfect.

On another note, what people think is "warped discs" is normally an uneven build up of pad material on the disc face. I've cleaned up loads of "warped discs" over the years and all have magically been straightened by the use of a wire brush and some brake cleaner.

Ive heard this said before on fb last week. Are you the same person saying it ?

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[Thefridge1980]

Thanks for the feedback, I shall be keeping my calipers and discs very clean,

 

[Alps Pacino]

Pof

No its not me I'm not on fb. I have had this argument over and over again though with people on the net including fb mainly because everyone has been told from day dot that brake judder is warped discs and people don't seem to want to believe anything else.

 

[alex]

Is emery cloth good for cleaning brake disc faces? After the wirebrushing?

Going to try to do a proper clean when I stick the PFC95 pads in.

 

[Thefridge1980]

I was going to ask what people use as a regular cleaner without going over the top, I get you can pop the caliper off and use brake cleaner to properly clean them occasionally, but that's pretty involved. I currently use muck off and elbow grease after a decent ride before putting the bike away. Any better ideas?

 

[pof]

Ive had the calipers out for a good clean this year. Its not a big job really. Like alex i just gave the discs a little rub over with emmery paper. I would have done the pad face as well but new pads went in

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[soofsayer]

IMO if you clean and check the calipers when you do a pad change that should suffice. I don't clean my discs or calipers otherwise.

 

[phil]

I am still on the original pads from when I bought my bike in 2010, now done 21k and they are only half worn. Ive not had a problem so far, I clean the brakes when I take the wheel out to change the front tyre. I also clean the discs every now n then after washing, I use a drill bit (with my fingers) to clean the holes in the disc.

 

[bananaman]

I am still on the original pads from when I bought my bike in 2010, now done 21k and they are only half worn. Ive not had a problem so far, I clean the brakes when I take the wheel out to change the front tyre. I also clean the discs every now n then after washing, I use a drill bit (with my fingers) to clean the holes in the disc.

Think you may have to use them to get any problems lol. You do motorway riding by chance ?

 

[phil]

Think you may have to use them to get any problems lol. You do motorway riding by chance ?

Very rarely do any motorway/dual carraigeways, mainly ride B roads/unclassified's and avoid big towns like the plague.