1981 FRONT CALIPER ON A 79

twinegar · Post by **twinegar** » Fri Nov 02, 2007 9:01 pm

Will it work?

daves79x · Post by **daves79x** » Sat Nov 03, 2007 7:55 am

No, the calipers for the '81-'82 have a much wider opening for the vented discs. A better set-up can be had by using 2-piston calipers and hangers from a 900F or the '82 750F. A couple of Nighthawks and CX650s had the same set-up. You need both calipers and hangers, but it is a bolt-on affair.

Dave

alimey4u2 · Post by **alimey4u2** » Sat Nov 03, 2007 1:19 pm

Thinking aloud, Will the Prolink vented discs fit early Comstar wheels ??

daves79x · Post by **daves79x** » Sat Nov 03, 2007 7:38 pm

Yes, the Pro-Link brakes and calipers will bolt right up to early wheels and forks. You need the caliper hangers and mounting bolts as well. Don't know why you would want to unless they were just laying around. They are far heavier than stock early stuff or 900F upgrade.

Dave

alimey4u2 · Post by **alimey4u2** » Sun Nov 04, 2007 5:52 am

I learn something new every day, Thanks Dave.....

cbxtacy · Post by **cbxtacy** » Sun Nov 04, 2007 10:01 pm

I've put CBR600F3 wheels on a prolink CBX twice. On one I used the stock calipers with thicker pads. The rotors on the F3 wheel are thinner then 79/80 CBX rotors. The big advantage is they're floating rotors. I also cut enough weight off that bike to where it's 150lbs lighter then a stock prolink. On my turbo CBX I mounted an F3 wheel and CBR900RR calipers. Those calipers are four piston and solidly mounted. That bike is only about 40lbs lighter then a stocker. Both are excellent stoppers. The one with the stock calipers I roadraced for years and it was one of the best stoppers out there, I'd outstop others all the time. I was also racing it in vintage and there weren't others with brakes as good out there most of the time. CBX's are heavy and stopping produces heat. All that heat must be dissapated. Larger (heavier) rotors will dissapate more heat then lighter ones. Prolink rotors will stay cooler but be (much) heavier then 79/80 rotors. I have no idea which rotor will work the best. I don't have CBX's because they stop so good, I have them because they sound so BITCHIN!
Even though it is nice to have a bike that stops good. Other problems are 19" wheel/tire combos are no where as good as modern 17"ers when it comes to stopping. Modern brakes on 19"ers used hard could have a tendancy to cause the front end to wash out during hard riding/braking.

EMS · Post by **EMS** » Mon Nov 05, 2007 6:00 am

CB1100R rotors are vented also, but lighter than the Prolink units. They also bolt right up to the wheels.

cbxtacy · Post by **cbxtacy** » Mon Nov 05, 2007 9:21 am

I'm wondering if the metal in the modern floating rotors disappates heat better then the metal in the rotors on our beloved CBX's. The modern bikes come with floaters, some are almost as heavy as our X's, have a much greater speed potential, and none come with ventilated rotors.

alimey4u2 · Post by **alimey4u2** » Mon Nov 05, 2007 2:49 pm

The best metal for this duty is cast iron ( highest coefficient of friction) but alas they rust very quickly. Manufacturers have gone with fashion & added stainless steel ......

EMS · Post by **EMS** » Tue Nov 06, 2007 5:19 pm

alimey4u2 wrote:The best metal for this duty is cast iron ( highest coefficient of friction) but alas they rust very quickly. Manufacturers have gone with fashion & added stainless steel ...

Not so Ducati, my friend

I have cast iron rotors on my 916SPS.

I admit, it is one of the features that separate the SPS from the Strada. But it is on it.

alimey4u2 · Post by **alimey4u2** » Tue Nov 06, 2007 5:22 pm

EMS wrote:
Not so Ducati, my friend I have cast iron rotors on my 916SPS. I admit, it is one of the features that separate the SPS from the Strada. But it is on it.

So too my PM's Mike, solution, dehumidifier in the garage....

piit · Post by **piit** » Wed Mar 05, 2008 3:10 pm

Hi, as cbxtacy wrote thicker pads can be used with prolink calibers and early model rotors. I bought thicker EBC (FA69/3) pads to front. Not installed yet, but will be done in near future. Please find a link http://www.ebcbrakes.com/Assets/USA%2008%20MC%20cat.pdf
-piit-

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-piit