Lightweight rear rotors
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- Kayla850
- NWAA Supporter
- Posts: 717
- Joined: Sun Apr 18, 2010 6:30 pm
- Bike owned: Sunn Tzar S2
- Location: County Durham
Re: Lightweight rear rotors
I won't touch front brake discs. The rears aren't so much of a problem because we sell them purely for race use to work once per weekend. ie scrutineering. Fronts have to work every time!Kurlon wrote:Tech requirements just state functional, they don't say anything about required specifications. :DMorespeedvicar wrote:wow thats well thin, I'm surprised they dont check min thickness at scrutineering, hell of a weight saving tho. Cool.
Oh, speaking of mountain bike calipers: https://lh6.googleusercontent.com/-ho1M ... cs+045.jpg
Kayla, I'll be ordering a rotor or two from you I think. :D
Have you made front rotor blades before? The 3TJs call for a 4mm thick rotor OEM, all the aftermarket companies are shipping 5mm thick units. I don't know if it'd be easier to make a whole new blade, or machine down an existing one?
I'm thinking of doing a run of ally discs, if you want to try a couple I'll send you some to test.
Useful project bike parts and stuff and things-
www.projection-racing.com
Titanium and Aluminium nuts & bolts-
www.pjcfasteners.com
www.projection-racing.com
Titanium and Aluminium nuts & bolts-
www.pjcfasteners.com
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- Settled in member
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- Joined: Wed Nov 23, 2011 8:33 pm
- Location: Southern Maine
Re: Lightweight rear rotors
I'd be game, although you offered up a pretty compelling argument for your lightweight steel ones over the alloy ones too.
Digging around it seems the industry has standardized on 5mm up front, occasionally I can spot a 4.5mm one, a few 5.5mm and at least one company is shipping 6mm thick rotors?! Amusingly that's just looking at YZF-R6 units too, interesting to see the range.
Digging around it seems the industry has standardized on 5mm up front, occasionally I can spot a 4.5mm one, a few 5.5mm and at least one company is shipping 6mm thick rotors?! Amusingly that's just looking at YZF-R6 units too, interesting to see the range.
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- Joined: Tue Apr 29, 2008 8:59 pm
- Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
- Location: Lundin Taan
Re: Lightweight rear rotors
I bought a Ducati front for the Bimota. Its a Dymag with magnesium 5 spoke with carbon rim ... which is niceKurlon wrote:I already have to wear kids' gear for some items, I don't think I can drop any more weight there. I just skip eating altogether on race weekends, nothing to 'purge' before the main event that way. I need my undercrackers or my leathers give me such a pinch... Male pattern insecurity is already setting in, no need to take a hatchet to what's left. Can't loose my toes, I finally found boots that fit and I'm NOT going shopping again! :D
On the wheel front, if my friend was still doing salvage I'd be all over the Duc option as they'd be EASY to source... unfortunately he's moved on. This R6 conversion looks pretty straight forward so far, just the rotor thickness that's bugging me. ISR lists all their custom rotors as being 5mm thick but I'll sling them a query just the same. I suppose if going all out I could get them to do up a single 6 pot to mate with a 320mm rotor, that'd save some much weight both on the bike and out of my wallet...

- Kayla850
- NWAA Supporter
- Posts: 717
- Joined: Sun Apr 18, 2010 6:30 pm
- Bike owned: Sunn Tzar S2
- Location: County Durham
Re: Lightweight rear rotors
Evilchicken0 wrote:I bought a Ducati front for the Bimota. Its a Dymag with magnesium 5 spoke with carbon rim ... which is nice

Boris, yesterday-

You jammy bugger.
Useful project bike parts and stuff and things-
www.projection-racing.com
Titanium and Aluminium nuts & bolts-
www.pjcfasteners.com
www.projection-racing.com
Titanium and Aluminium nuts & bolts-
www.pjcfasteners.com
-
- Site Supporter
- Posts: 5374
- Joined: Tue Apr 29, 2008 8:59 pm
- Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
- Location: Lundin Taan
Re: Lightweight rear rotors
Nah - I use a Monopol 

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- Settled in member
- Posts: 170
- Joined: Wed Nov 23, 2011 8:33 pm
- Location: Southern Maine
Re: Lightweight rear rotors
And I thought I was cool finding a vintage Dymag TT3 rear for my machine.
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- Site Supporter
- Posts: 5374
- Joined: Tue Apr 29, 2008 8:59 pm
- Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
- Location: Lundin Taan
Re: Lightweight rear rotors
You are, finding aftermarket wheels for the FZR seems to be a difficult thing, you could try an Aprilla RS250 front the stud pattern looks right for the FZR discs
Dymag Wheel

Schule downpipes for the Bim ... one day

Dymag Wheel

Schule downpipes for the Bim ... one day

