Because there is more swept area the brake rotors can be a smaller diameter with the same amount of braking force.

Smaller diameter rotors = less rotating mass = quicker turn in and less force required on the bars to turn.

 

over years it been like this. there were some 6 pots on bikes years ago. but im guessing lighter is better. new R1 have lighter rotor and big 6 pots on it. im sure cost is issue as well. some designs work better than others. i know on GP bikes...there brakes are killer. and they have plenty of stopping power. but there brakes are far cry from what we use, plus there bikes are lighter. im sure there is some better tehcnical aspects to it, but i know brakes on 04-06 are some of best i have ever had pleasure of using.

 

but i know brakes on 04-06 are some of best i have ever had pleasure of using.

:stpd: I'm just hoping the 07's are "as" good....

 

Race teams use ultralight and ultra expensive wheels. Much cheaper to use larger caliper/smaller rotor on a road bike

 

Man I love it when this forum comes back to normal with REAL conversations about R1's. Reminds me of the old days!!

But to quote the R1 introduction in Roadracing World, Dec 2006 issue, page 6.

"The front calipers have gone from 4piston units to 6 piston 4pad units. This setup puts the pads further away from the axle, effectively increasing the brake rotor diameter and allowing the actual brake rotor diameter to be decreased from 320mm to 310mm for a reduction in the inertial moment at the axle and lighter handling according to Yamaha."

To put that in normal people terms the 07 R1 should require less steering effort to fall over into a corner..

Rather the 6piston setup truly is that much better than a 4 piston is still to be questioned as you say because "everybody" else in racing is using 4 piston.

I think the fact Brembo is the top name in brakes and stick to a 4 piston design has alot to do with it also. Yamaha may have one theory.. but with Brembo being the world leader in performance brakes.. it appears Brembo has another.

 

http://www.brembo.com/ENG/HighPerformance-Brakes/Productzoom/6PistonMonoblockCaliper.htm

 

http://www.brembo.com/ENG/HighPerformance-Brakes/Productzoom/6PistonMonoblockCaliper.htm

:1pok: car brakes= no relevance.:secret:

 

im not so sure on the 4 pads in the new 6 pots. but i understand it. but im sure the replacement pads are gonna be more expensive, instead of buying 2 pads for 1 caliper, the package will now have 4 pads for each one. be interesting to see how the aftermarket stuff is priced for them.

 

They had to go with 2 pads per side due to excessive warping that was occurring with single pads. The leading edge would get really hot and the trailing edge not so much. The pads were warping.

 

I actually thought the 04 brakes SUCKED big time.

On my race bike one of the first things I replaced was the mastercylinder with a Brembo 19x18 unit. And if you guys thought the brakes were great before you'd probably nut on yourselves after this upgrade. The best $230 bucks I have ever spent on a bike.

On the track the easiest way to pass someone is braking later than them or just simply over powering them on the brakes. You would be suprised how many people punk out when its time to drop down from 170/180mph straightway speed to a 30mph turn 1.

I have no problem lifting the rrear tire going hard as hell on the brakes and have more than enough power to actually sit the nose of my bike on my front fender if I got put in an emergency situation. I dont have the picture but in the first race of this year a guy crashed right in front of me and I was able to do just that instead of running him over! I'll post the picture tonite.

 

I actually thought the 04 brakes SUCKED big time.

Could be because the '04 radial calipers have aluminum pistons. Compared to steel, aluminum transfers more heat into brake fluid.

 

im not an engineer so ill leave my fate with their brakes and physical
mechanical engineering wisdom...yet drum brakes work too????

 

Well they way you improve braking is improve the brake torque by going to a larger rotor and modulation of caliper. The 6 pot will provide better modulation and keep the pads parallel better to the rotor given pot size doesnt change between a 4 pot or 6 pot setup. I think Yamaha knew they could offset by going to larger rotor diameter with a better caliper setup. But then i wont be surprised if the 08 or 09 model has a 5-10mm larger diameter rotor...

 

I've already heard that they tested both and, for what the 6 pots were better, the last set of pistons (5th and 6th) weren't working at their 100% capacity. The 4 were a little lighter and braked quite as much... so they've deceided to work on the 4 "pistons" brake model instead...

 

If anyone thinks they're going to notice any difference in turn-in going from 320mm rotors to 310mm are insane :lol

I went from 298mm rotors to 320mm rotors and noticed absolutely not difference in the feeling of the bike.

My crappy 4 pot large rotor setup works great on my soon to be 4 year old R1 :lol

 

If anyone thinks they're going to notice any difference in turn-in going from 320mm rotors to 310mm are insane :lol

I went from 298mm rotors to 320mm rotors and noticed absolutely not difference in the feeling of the bike.

My crappy 4 pot large rotor setup works great on my soon to be 4 year old R1 :lol

yea but your 320 mm aftermarket disks probally weighed less than the 298mm

 

Best mod you can make is the 19x18 Brembo master like Daekwan said. Upgrading brakes are one of the best mods you can make. You can stop a 400Ibs plus machine from 100MPH faster than you can accelerate too 100MPH. 150 plus HP compared too two fingers exerting 15Ibs of pressure.

Yamaha's making up for a smaller diameter rotor with the six pots. Also reducing less rotating weight by dropping the diameter and thickness of the rotors.

 

Best mod you can make is the 19x18 Brembo master like Daekwan said. Upgrading brakes are one of the best mods you can make. You can stop a 400Ibs plus machine from 100MPH faster than you can accelerate too 100MPH. 150 plus HP compared too two fingers exerting 15Ibs of pressure.

Yamaha's making up for a smaller diameter rotor with the six pots. Also reducing less rotating weight by dropping the diameter and thickness of the rotors.

I´m using Brembo 19x20 but all the same, it´s a top mod with a good set of pads and braided lines :thumbup

 

So, where do Brembo's monoblocks fit into all this?

 

right behind the cash register waiting for a healthy chunk of change :chair:

 

Like someone else said, the main advantage to the new 6-pot brakes is that they utilize twice the # of pads......4 on each side instead of 2, plus a slightly greater swept area.

Double the # of pads means less work for each individual pad. Therefore the brakes will warp less, stay cooler, stop the motorcycle faster, and last longer.

 

Like someone else said, the main advantage to the new 6-pot brakes is that they utilize twice the # of pads......4 on each side instead of 2, plus a slightly greater swept area.

Double the # of pads means less work for each individual pad. Therefore the brakes will warp less, stay cooler, stop the motorcycle faster, and last longer.

IMO I'd think it would be opposite. Thinner rotors, more pads equals more friction surface area and heat. I'd think they would be more prone to warp.

 

:corn

 

All good when you concentrate your thinking on the brakes,but bigger calipers mean more weight at the wrong place in the suspension...making it a bit more sluggish to react then it could have been with smaller calipers.

...in theory.

Its all damn sales pitch.