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Old 03-26-2008, 12:27 PM
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Did you know?

Stock VTR front calipers weigh 2 pounds 6.6oz and 01 GSXR 6 piston calipers weigh 2 pounds 6.1 oz. For a total unsprung mass savings of 1oz. YEAH!

So anyway, I got them used from ebay. Cleaned them up real good, checked the pads, and mounted them. Bled the crap out of the system, made sure everything was tight, etc. etc.

And they suck. Anything above about 15mph when I squeeze the lever (which has plenty of pressure) I get a weird chattering sound. Almost sounds like air, but I've checked for leaks after all three test rides, and bled them again after each. No air is getting in.

Is it maybe because I'm still using the stock tiny master cylinder? Any ideas, maybe some important step I missed?

Last edited by drew_c14; 03-26-2008 at 12:35 PM.
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Old 03-26-2008, 12:34 PM
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Got to that third paragraph and got ahead of myself. I started reading, And they rocked.....sucked!? What the hell?
And 10oz.? How is that possible?
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Old 03-26-2008, 12:34 PM
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it's not...I mistyped...lol
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Old 03-26-2008, 12:44 PM
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How is the braking response? Does it seem like the pads are not in full contact with the rotors? Are the pistons clean? I had a set of CBR929 calipers once that the pistons had brake residue on them and would not slide properly... maybe the chattering you are talking about the pad not coming in full contact with the rotor??
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Old 03-26-2008, 12:49 PM
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The response is smooth, but not very sharp. I tried my hardest to get the front to lock up or even chirp, but it wouldn't do it. I looked the the pistons pretty close while I was cleaning them, I think the are alright. The pads were used but had a lot of life left, maybe they are crap?

How would I be able to tell if the pads are engaging all the way?
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Old 03-26-2008, 01:14 PM
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I think the pads might be contaminated. What do you clean them with. Good excuse to get some hh++. Yeah, I know more money spent..... IIRC, someone tried them with a stock m/c and report OK results so I don't think it's that.

I can't believe they are actually lighter than stock. That's just ironic as hell. I guess if you look at it as they have more holes then it makes sense! LOL
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Old 03-26-2008, 01:15 PM
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Originally Posted by superbling View Post
I think the pads might be contaminated. What do you clean them with. Good excuse to get some hh++. Yeah, I know more money spent..... IIRC, someone tried them with a stock m/c and report OK results so I don't think it's that.

I can't believe they are actually lighter than stock. That's just ironic as hell. I guess if you look at it as they have more holes then it makes sense! LOL
I didn't actually clean the pads at all. Took them out before I cleaned everything else. Should I clean them and if so with what?
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Old 03-27-2008, 03:34 PM
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Originally Posted by superbling View Post
Good excuse to get some hh++.
You were right, that solved the problem. 100% better.
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