Author Topic: Anyone do the oversized brake rotor upgrade?  (Read 1013 times)

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Offline Staylo

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Anyone do the oversized brake rotor upgrade?
« on: June 07, 2018, 04:31:47 pm »
One thing I really miss about my Ducati was the fantastic breaking power it had. Granted, it was considerably lighter than the Connie, but I’m looking into the oversize brake rotor upgrade, and was wondering if anyone has done it? I’m looking at the Axis stainless oversized kits. Primarily, I’m wondering how much the ability to get the brake calipers off is impacted with the oversize rotors?  I’ve not yet tried to remove the brake calipers from this bike, but I’m just wondering whether adding a 320 mm, or 330 mm brake rotor still allows enough room to remove the calipers for changing tires, etc.
Lancaster County, PA
'11 C14

Offline Daytona_Mike

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #1 on: June 07, 2018, 04:47:44 pm »
They make a 330mm kit?   wow.   Compared to stock 310 ...  I would like that.
 I was not impressed with my C14 brakes  when I first bought the bike compared to my old C10 that had a 320mm  big brake kit wiith 4 pots. That bike could (and still does) stop better than my C14.
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Offline connie_rider

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #2 on: June 07, 2018, 05:23:38 pm »
The 330 might be a difficult to do, but I think both are do-able.

If your buying new Rotors anyway, may be worth doing.
  If your doing the 320mm for more braking, it's only a (5 mm) .199" greater radius.
     Not going to make a huge amount of difference.
  The 330mm would give the most improvement.

Ride safe, Ted
« Last Edit: June 07, 2018, 07:09:07 pm by connie_rider »
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Offline Staylo

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #3 on: June 07, 2018, 06:13:52 pm »
Might be a bit more difficult to do, but do-able.
If your buying new Rotors anyway, may be worth doing.
  If your doing it for more braking, it's only a (2.5 mm) .199" greater radius.
     Not going to make a huge amount of difference.

Ride safe, Ted
Maybe I’m missing something , but 310mm to 320mm is +5mm radius, and 310mm to 330mm is +10mm.
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Offline connie_rider

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #4 on: June 07, 2018, 07:05:23 pm »
My oops. I somehow got the numbers wrong. :-[
Your right; 310mm to 320mm is +5mm (.197") radius, and 310mm to 330mm is +10mm (.394")

That sed, I suspect the both are do-able, but the 330mm is gonna be rough..

I'll guess that all you have to do to the calipers is; add 5 or 10 mm spacers?

Ride safe, Ted

PS: I went back and reworded my note.
« Last Edit: June 07, 2018, 07:12:03 pm by connie_rider »
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Offline Staylo

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #5 on: June 07, 2018, 09:20:09 pm »
The upgrade kits are supposed to come with the spacers. Obviously, as the distance from the axle increases, the torque increases, increasing stopping power, but I’m not really sure how much additional stopping force would be gained going to larger rotors. However, the cost is not that much more going with larger rotors so there’s certainly nothing to be lost. I just remember on my Ducati you could BARELY get the calipers off the rotors when you wanted to remove the front wheel. I didn’t want to get into a situation where I bought everything only to find I can’t get the calipers on and off.
Lancaster County, PA
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Offline Daytona_Mike

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #6 on: June 07, 2018, 10:13:00 pm »
Quite a few of us older riders who have and had C10's went from 300 to 320mm and the  braking improvement is massive.
 Now part of that may have been going from stock  2 pot to 4 and even 6 pot calipers. Like I said, my C10  which is an antique can outstop the stock C14 and the other great thing about over size rotors, you need to rail on them hard for about 100k miles before you wear out those over sized  rotors.
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Offline connie_rider

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #7 on: June 07, 2018, 10:21:08 pm »
Might do a search in the Forum. I recall that someone installed bigger rotors.
Not sure who, nor how much bigger..

Good luck, Ride safe, Ted

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Offline Freddy

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Offline smokin

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #9 on: June 09, 2018, 02:42:00 am »
Done by Smokin in Oz.   :great:

https://www.tapatalk.com/groups/gtr1000/front-brake-rotor-upgrade-t7195.html

320 mm Brembo oreo that came with caliper spacers and longer caliper bolts.Same part number as Kawasaki ZX1400.


Offline Staylo

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #10 on: June 09, 2018, 01:08:04 pm »
Done by Smokin in Oz.   :great:

https://www.tapatalk.com/groups/gtr1000/front-brake-rotor-upgrade-t7195.html

320 mm Brembo oreo that came with caliper spacers and longer caliper bolts.Same part number as Kawasaki ZX1400.

Did the spacer/bolt kit come with the rotors, or did you have to buy them separately? I’m not seeing a complete Brembo kit anywhere. Also, my biggest question is can you still get the calipers on and off normally with the 330mm rotors?  Thanks.
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Offline JDSCO

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #11 on: June 09, 2018, 01:36:03 pm »
My '16 doesn't have much aft clearance when removing the caliper.
I have already "dinged" the wheel rim while removing one caliper so 10mm rad increase seems like the max, if not an interference fit.

I'm still not a fan of linked brakes but I'm intrigued with the 330mm rotor. Go BIG or go home! Right?
« Last Edit: June 09, 2018, 01:49:56 pm by JDSCO »
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Re: Anyone do the oversized brake rotor upgrade?
« Reply #12 on: June 09, 2018, 08:45:37 pm »
It must be a real pain putting air in with 330 s
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Offline Staylo

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #13 on: June 09, 2018, 10:35:16 pm »
It must be a real pain putting air in with 330 s

Never thought about that! 
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Offline Freddy

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #14 on: June 10, 2018, 03:54:20 am »
It must be a real pain putting air in with 330 s

Not if you have right angle valve stems mounted to the early type sensors.  Later type may be difficult.
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Offline smokin

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #15 on: June 10, 2018, 07:07:42 am »
Done by Smokin in Oz.   :great:

https://www.tapatalk.com/groups/gtr1000/front-brake-rotor-upgrade-t7195.html

320 mm Brembo oreo that came with caliper spacers and longer caliper bolts.Same part number as Kawasaki ZX1400.


Yes the kit came with the 320mm Brembo Rotors.I Purchased them from this link via Ebay: https://www.biketorqueracing.co.uk/buy/brembo-brembo-serie-oro-disc-320mm/78b40879.htm#eq1
This link for 330mm front rotors: https://www.solomotoparts.com/Brake-Tech-Axis-Oversized-330mm-Iron-Full-Floating-Front-Brake-Rotors-for-ZX14R-06-12/


Did the spacer/bolt kit come with the rotors, or did you have to buy them separately? I’m not seeing a complete Brembo kit anywhere. Also, my biggest question is can you still get the calipers on and off normally with the 330mm rotors?  Thanks.
« Last Edit: June 10, 2018, 07:13:00 am by smokin »

Offline Colt45

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #16 on: June 10, 2018, 11:16:08 pm »
The upgrade kits are supposed to come with the spacers. Obviously, as the distance from the axle increases, the torque increases, increasing stopping power, but I’m not really sure how much additional stopping force would be gained going to larger rotors. However, the cost is not that much more going with larger rotors so there’s certainly nothing to be lost. I just remember on my Ducati you could BARELY get the calipers off the rotors when you wanted to remove the front wheel. I didn’t want to get into a situation where I bought everything only to find I can’t get the calipers on and off.

Brakes create torque with friction.  Friction force is normal (clamping) force x sliding friction coefficient.
100 kg of friction x 310mm = 31000/1000 = 31 kg.m of torque

100 kg x 330mm +33000/1000 = 33kg.m of torque

(33-31)/31 = 6.45% greater brake torque. 

How much are you spending for 6.5% more brake power?  Better to look for pads with a higher friction coefficient, or calipers with larger pistons (higher clamping force). 
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Offline rcannon409

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #17 on: June 11, 2018, 12:01:24 am »
Colt, seriously, that's it, isn't it?

I've tried all the sized we have discussed...even more.  Ive tried 300, 310, 320 and 330, on the same bike.

What I found fits that 6% number you gave .  That change from 310 to 330 was nothing to speak of, and the pads did make much more difference.

The Galfer 310 rotors were almost an exception.  That wave shape did grab really hard, but other than that, they felt like everything else.
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Offline smokin

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #18 on: June 11, 2018, 12:15:39 am »
The upgrade kits are supposed to come with the spacers. Obviously, as the distance from the axle increases, the torque increases, increasing stopping power, but I’m not really sure how much additional stopping force would be gained going to larger rotors. However, the cost is not that much more going with larger rotors so there’s certainly nothing to be lost. I just remember on my Ducati you could BARELY get the calipers off the rotors when you wanted to remove the front wheel. I didn’t want to get into a situation where I bought everything only to find I can’t get the calipers on and off.

Brakes create torque with friction.  Friction force is normal (clamping) force x sliding friction coefficient.
100 kg of friction x 310mm = 31000/1000 = 31 kg.m of torque

100 kg x 330mm +33000/1000 = 33kg.m of torque

(33-31)/31 = 6.45% greater brake torque. 

How much are you spending for 6.5% more brake power?  Better to look for pads with a higher friction coefficient, or calipers with larger pistons (higher clamping force).


Simple answer,the Brembo brakes rotors from over seas delivered were  much cheaper the an OEM replacement cost here is Aus,choice was either,EBC,GALFER, OR BREMBO.
I went with Brembo because I believe to be superior quality,and have better longevity.Most racing bikes use that brand so there has be something in that IMHO.
My money,my decision,simple as that.

Offline Daytona_Mike

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #19 on: June 11, 2018, 01:13:30 pm »
The upgrade kits are supposed to come with the spacers. Obviously, as the distance from the axle increases, the torque increases, increasing stopping power, but I’m not really sure how much additional stopping force would be gained going to larger rotors. However, the cost is not that much more going with larger rotors so there’s certainly nothing to be lost. I just remember on my Ducati you could BARELY get the calipers off the rotors when you wanted to remove the front wheel. I didn’t want to get into a situation where I bought everything only to find I can’t get the calipers on and off.

Brakes create torque with friction.  Friction force is normal (clamping) force x sliding friction coefficient.
100 kg of friction x 310mm = 31000/1000 = 31 kg.m of torque

100 kg x 330mm +33000/1000 = 33kg.m of torque

(33-31)/31 = 6.45% greater brake torque. 

How much are you spending for 6.5% more brake power?  Better to look for pads with a higher friction coefficient, or calipers with larger pistons (higher clamping force).


Simple answer,the Brembo brakes rotors from over seas delivered were  much cheaper the an OEM replacement cost here is Aus,choice was either,EBC,GALFER, OR BREMBO.
I went with Brembo because I believe to be superior quality,and have better longevity.Most racing bikes use that brand so there has be something in that IMHO.
My money,my decision,simple as that.

Agreed!  :beerchug: :beerchug:  I plan on doing that too based on my C10 going from 300 to 320 - if that is 12% increase  by the numbers then in real world riding it is   a  definite 200% improvement in stopping power not to mention never warping again and never wearing out the oversize rotors.
The Brembos  are 5mm thick, as opposed to the original 4.5mm thick discs fitted as standard. This leads to greater heat dissipation which significantly reduces the risk of warping
Good money well spent. The benefits in increased safety and last much  longer  far out way the cost.
Normally aspirated engines have perpetual turbo lag
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Offline Colt45

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #20 on: June 11, 2018, 01:25:51 pm »
No Problem. 

If/When I need rotors, I'll go with 320s and add the 5mm Honda caliper spacers.  It makes sense then. 

I did the 4 piston conversion to my C10.  I remember it gave a little better feel, but wasn't impressed until I had to brake HARD while chasing Rev Rider on his turbo in the Hill Country.   :-\  More piston area works. 
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Offline gpd323

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #21 on: June 12, 2018, 07:40:44 pm »
The reason I went with the Brake-Tech Axis full floating rotors is I knew the stock rotors would warp at some point and wanted to make the purchase and never touch them again. They are about the same cost as OEM. Yes they come with the spacers and longer SS caliper bolts. Yes they are a bit difficult to get the caliper off and around the wheel, but its doable without hitting the wheel. Yes its a bit difficult getting an air nozzle on the valve stem but I have a compact air pump and hose so its not too bad.

I have 35K on the C14 now and put the Brake-Techs on pretty much when it was new. I have 75K miles on my ZX14 with the same rotors and they are still in excellent condition.  :beerchug:
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Offline smokin

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Re: Anyone do the oversized brake rotor upgrade?
« Reply #22 on: June 12, 2018, 10:38:45 pm »
Yeah.I looked at brake tech,awesome rotors,just a little bit to expensive due to cost of getting them from the USA.You cant beat quality.
Interestingly enough postage from the USA to Australia is very expensive compared to postage from the UK.
That was the deciding factor regarding the purchase of Brembo rotors.
Bigger better quality rotors definitely means cost saving in the long term IMHO.   
« Last Edit: June 12, 2018, 10:50:10 pm by smokin »