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Old brake rotors

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Old brake rotors

Postby Danno » Sat Feb 18, 2017 6:35 am

Any condition but bent. rusty. gnarly whatever.

I rode the SS clone yesterday and I've decided the rotors I had drilled back in the 1980s are just not working as well as they should. I read a blurb about brake drilling that said overdrilling or drilling the holes too large will cause the pad to "not see" enough surface area at any one time to get a good grab. This is what I have now:

Image

As you can see, the holes in the swept area are rather large. Anyone out there who has dumped the stock rotors for aftermarket and wants to get rid of the circular boat anchors, I mean old stockers?
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Re: Old brake rotors

Postby Fast Eddie » Sat Feb 18, 2017 7:36 am

I think there has been some discussion on here re the holes should only be the same diameter as the discs are thick.
Anyway, can't help with your quest for old iron lumps, just wanted to say that's a splendid looking motorcycle yer got there !
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Re: Old brake rotors

Postby Danno » Sat Feb 18, 2017 11:06 am

Thank you. Like all old bikes that aren't re-made completely new, it has some issues, but better braking is #1 on the list.
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Re: Old brake rotors

Postby pantah_good » Sat Feb 18, 2017 12:29 pm

Are both those rotors drilled the same? The front holes look a little smaller. If that was mine, I'd leave the rear alone, or if you use the rear brake a lot maybe move the front to the rear if it's holes are a little smaller. Mine is set up for the RGM 12" floater, so won't be needing my old o.e.m. rotor. It doesn't rock when lying on a glass surface plate. Can be had for - I have no idea - cheap.
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Re: Old brake rotors

Postby Danno » Sun Feb 19, 2017 3:05 am

PM me a price with shipping, Bill. Both my rotors are drilled exactly the same, so it must be a perspective trick that makes the front holes look smaller than the rear.

The front brake obviously needs attention first, but in the end, I want them to match. I will request DBR use the same pattern (use the old one for a pattern) only with smaller holes in the swept area.

I spoke to Gary Holowich briefly the other day when I picked up the flood victim's front rotor. He is looking to sell his shop and machine tools and retire as soon as someone comes with the money, so don't diddle around if you have rotors that need drilling/resurfacing. The next guy may not be the enthusiast Gary is and things could change.
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Re: Old brake rotors

Postby grandpaul » Sun Feb 19, 2017 6:44 am

Gary has done over 20 rotors for me, I like this pattern best...

Image
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Re: Old brake rotors

Postby Danno » Sun Feb 19, 2017 7:26 pm

grandpaul wrote:Gary has done over 20 rotors for me, I like this pattern best...

Image


That's more like what I'm looking for than the Swiss cheese pattern I have currently.
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Re: Old brake rotors

Postby Danno » Mon Feb 20, 2017 4:37 am

Got one coming from Bill, who has saved my butt a couple times with his stash of good used parts. Anyone else got one laying around you keep tripping over?
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Re: Old brake rotors

Postby grandpaul » Mon Feb 20, 2017 8:52 am

Danno wrote:Anyone else got one laying around you keep tripping over?

I have 2, and I LITERALLY tripped over them a few days ago, after laying them out to take a photo.

I'll trade one (you pick) for the two drilled ones. I want to keep the other one for a backup spare.

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Re: Old brake rotors

Postby Danno » Mon Feb 20, 2017 11:09 am

Sounds good to me. Send me whichever one you don't want, as long as it's straight. Mine would be good for a show custom, but as actual brakes, well, they LOOK good......
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