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Author Topic: 330mm discs [rotors] with 80mm PCD [honda CB hub]  (Read 479 times)

Offline crazypj

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Re: 330mm discs [rotors] with 80mm PCD [honda CB hub]
« Reply #10 on: May 13, 2018, 21:11:44 »
I kinda had a suspicion you were trying to use Yamaha calipers, Suzuki ones are 'slimmer'
Wider yokes will also help or as Teazer clarified, swap for an earlier front end with sliding calipers
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Oneorangedog

  • Posts: 6
Re: 330mm discs [rotors] with 80mm PCD [honda CB hub]
« Reply #11 on: May 17, 2018, 03:31:51 »
So the next way to look at this is what alternative calipers are available that might be slimmer on the inside.  Maybe there's a set of slimmer Tokico calipers that Irk Miller mentioned above.

Hang on a minute.  What is the center to center fork spacing of those forks?  There are at least two different GSXR fork widths and maybe your triple clamps are narrow compared to others. I think yours are maybe 207mm compared to some with 214mm ctr to ctr distances.

http://www.svrider.com/forum/showthread.php?t=135430

I tried the Tokico calipers for size - they are the same dimensions towards the inside.

I wish i had thought about getting the 214mm centre triple clamps, before I had a nice top clamp machined up! That would have made my life much easier, live and learn.

Offline irk miller

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Re: 330mm discs [rotors] with 80mm PCD [honda CB hub]
« Reply #12 on: May 17, 2018, 09:39:18 »
So that's the difference?  I think we all could take that note down for the future.  Not a lot of forums specifically address the triple center measurement.

Offline teazer

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Re: 330mm discs [rotors] with 80mm PCD [honda CB hub]
« Reply #13 on: May 17, 2018, 16:01:25 »
It took me a moment or two to work out what was wrong.  With spoked wheels and narrow triples, it's necessary to use sliding caliper pistons. Change to wider triples or cast wheels and there are more options.