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 Post subject: Aluminum brake rotors
PostPosted: Sat Dec 17, 2016 4:48 am 
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Joined: Sun Sep 06, 2015 6:01 am
Posts: 40
Location: Metamora, MI
Any info on availability of an alloy rotor to replace the stock 6.6lb s.s. slug?

cliff


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PostPosted: Sat Dec 17, 2016 5:13 am 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 2389
We tried them back in the dark ages, all sorts of different alloy makeups and coatings, including flame sprayed onto the aluminum.

The 72 holes worked better back then, cut the steel disk weight in half. Unsprung weight is hard to manage.

There has to be a better, lighter answer these days.


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PostPosted: Sat Dec 17, 2016 5:34 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4192
Location: Moana, South Australia
Well, the MotoGP guys have used Carbon matrix rotors, but I haven't seen any on E-Bay yet!!!

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PostPosted: Sat Dec 17, 2016 6:05 am 
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Joined: Sun Sep 06, 2015 6:01 am
Posts: 40
Location: Metamora, MI
Thanx Tuner. Long time no hear.
1/2 the weight?

Rod, sounds $$$$ but interesting

I am wanting to keep some ole skool looks to my H1
Rear wheel is a 16" Borrani from a XS650 Special2 with same rolling radius as stock
Front is stocker 19" with 2X disks

Plan is to relace a XS front-although stock, it is not Borrani but the looks of the front alum rim to match rear is #1 goal
#2 is to shed some lb's to boot!


Alcan?

I'll run some numbers to get a weight savings v. hole geometry.

cliff


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PostPosted: Sat Dec 17, 2016 7:06 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4192
Location: Moana, South Australia
I have a set of "Hyperlite" discs from back in the day, (late '70's?) which, while steel, are only about 4mm thick, and are a bolt on. They are a lot lighter than the stock stainless steel alloy of the originals, and there must be some around somewhere. I'll try and find a picture, some of the guys here have them on their bikes. :think:

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PostPosted: Sat Dec 17, 2016 7:25 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4192
Location: Moana, South Australia
Here:-
Image

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PostPosted: Sat Dec 17, 2016 8:38 am 

Joined: Thu Jun 09, 2011 11:25 am
Posts: 2389
I remember that with the 1/2 inch holes, 72 of them, the discs lost like 48 percent of the disc weight each.

I remember John cuts both the bolt plate and thins the disc. Drill it as well, it should get right nice and light. Rod's disks have a lot of potential as well.

I'd go with an 18 inch front wheel and tire. I like the 16 inch rear, tastefully done, sir, effective option.


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PostPosted: Sat Dec 17, 2016 12:35 pm 
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Joined: Fri Jun 10, 2011 11:04 am
Posts: 3219
Location: Capitol of Ca, USA
Cliff, pm sent. ;)

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PostPosted: Sun Dec 18, 2016 4:03 am 
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Joined: Thu Jun 09, 2011 3:06 am
Posts: 4289
Location: PARIS FRANCE
Double discs brembo kit for h1 h2 z1 6 holes are lighter than a single genuine kawa disc :mrgreen:


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PostPosted: Sun Dec 18, 2016 11:39 am 
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Joined: Sun Sep 06, 2015 6:01 am
Posts: 40
Location: Metamora, MI
Thanx Dar..

and you froggy :wave:

I tried to look up the Brembo kit to no avail.

Is it because I want 6 screws attachment?

"More is better-it's been proven!"
"We've always done it that way!"

some of the non sense I hear at work

This site is my antidote!

Well done all.

cliff


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