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What brake master

Old 03-05-2010, 08:03 PM
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What brake master

I'm replacing my front end with a trick 900rr front end with erion racing triples and oversize rotor kit from braking that I got from MCleather (Thanks Jay, he's a good guy). Anyways I got some triumph 955i clip ons to go under the triples now I'm just trying to decide what to do with the calipers and master cylinder. My options are as follows.
Calipers: stock, 900rr, F4
Master: stock, 08 600rr
So are the F4 calipers the same as F4i calipers? are the 900rr calipers the same piston diameter? is the rr master 11/16 (17.5 mm) if so is that going to leave good braking power? I calculated the leverage ratio of master area (assuming 17.46mm) to caliper piston area of f4i calipers at 28 this seems acceptable since stock ranges on sport bikes seem to be between 23 to 35.

Last edited by spladle160; 03-05-2010 at 08:23 PM.
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Old 03-05-2010, 08:31 PM
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Old 03-05-2010, 08:36 PM
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yo g just where in that thread did you see anything about 900rr caliper piston sizes or 08 600rr mc bore?
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Old 03-05-2010, 09:25 PM
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2003-2004 CBR600RR mc 11/16” (17.4625 mm)
caliper pistons 32mm/30mm

2000-2001 CBR929RR mc 19mm
caliper pistons 34mm/30mm

2002-2003 CBR954RR mc 11/16” (17.4625 mm)
caliper pistons 32mm/30mm

2000-2001 RC51 mc 19mm
caliper pistons 34mm/32mm

2002-present RC51 mc 11/16” (17.4625 mm)
caliper pistons 32mm/30mm

1999-Present CBR600F4(i) mc 5/8” (15.87mm)
caliper pistons 34mm/32mm

1996-1997 900RR mc 14mm
caliper pistons 30mm/27mm

1998+ 900RR mc 15mm
caliper pistons 34mm/32mm

Stock VTR Master Cylinder 14mm
caliper pistons 30mm/27mm
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Old 03-05-2010, 09:56 PM
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That's one question answered well sort of, now I need to figure out what year my 900rr calipers are. Now I just need to know the 08 600rr mc bore. and of course everyones opinion on the best combo.
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Old 03-06-2010, 10:18 AM
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Originally Posted by spladle160 View Post
That's one question answered well sort of, now I need to figure out what year my 900rr calipers are. Now I just need to know the 08 600rr mc bore. and of course everyones opinion on the best combo.
Well the 600rr master that I have (and that I am selling) has a 11\16" bore but it's an '04 so it's not a radial master.

Last edited by 8541Hawk; 03-06-2010 at 11:19 AM.
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Old 03-06-2010, 10:59 AM
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I'm using a 929 19mm MC with GSXR Tokico 3 pistons calipers, and I wish the brake lever had less travel. IMO go for the largest MC you have available.
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