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List of Bolt-On Front Brake Mods

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Old 08-08-2011, 05:53 PM
  #181  
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FWIW I got an article sent to me by someone when I was doing some research on 6 piston Tokicos and 4 piston Nissin/Tokico/Sumitomo (Yamaha) calipers. By the way, a number of the ZRX riders dumped the six pistons in favor of four for better and more consistant stopping. Seems the 6 pistons can get a bit temperamental and aren't that great.

Another VTR forum - Firestorm forum has a great write up with a table for caliper/master cylinder size and leverage.

From everything I've learned, I'm going 4 piston and have a full CBR900 brake set up I'm trying to adapt to the 550. I also have a set of six piston calipers (actually two, but one is not mine) to work on adapting them to an Eliminator.
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Old 08-09-2011, 07:40 AM
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Originally Posted by klx678
FWIW I got an article sent to me by someone when I was doing some research on 6 piston Tokicos and 4 piston Nissin/Tokico/Sumitomo (Yamaha) calipers. By the way, a number of the ZRX riders dumped the six pistons in favor of four for better and more consistant stopping. Seems the 6 pistons can get a bit temperamental and aren't that great.

Another VTR forum - Firestorm forum has a great write up with a table for caliper/master cylinder size and leverage.

From everything I've learned, I'm going 4 piston and have a full CBR900 brake set up I'm trying to adapt to the 550. I also have a set of six piston calipers (actually two, but one is not mine) to work on adapting them to an Eliminator.
A nicely formated table, but he did lift about 75% of the information from this thread in the first place...
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Old 08-09-2011, 08:34 AM
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Originally Posted by Tweety
A nicely formated table, but he did lift about 75% of the information from this thread in the first place...
Probably, but if it is helpful, it's all good.
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Old 08-09-2011, 09:21 AM
  #184  
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M/C ?

Hi Guys, quick question regrading the stock superhawk M/C. I like my brakes right now. Stock M/C and calipers with Galfer lines and EBC HH pads. All good, only issue I have is with the stock M/C. Is there any other stock Honda M/C that would work better that the stock Superhawk one? Thinking that maybe there are other stock Honda M/C that may offer better braking power or feel? Thanks all Steve
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Old 08-09-2011, 09:33 AM
  #185  
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Originally Posted by speedkelly@aol.com
Hi Guys, quick question regrading the stock superhawk M/C. I like my brakes right now. Stock M/C and calipers with Galfer lines and EBC HH pads. All good, only issue I have is with the stock M/C. Is there any other stock Honda M/C that would work better that the stock Superhawk one? Thinking that maybe there are other stock Honda M/C that may offer better braking power or feel? Thanks all Steve
RC 51 SP2
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Old 08-09-2011, 10:41 AM
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I first tried a SP1 MC with the stock calipers & EBC HH pads, then the same SP1 MC with F4i calipers & EBC HH pads and now finally settled on a SP2 MC with the F4i calipers & EBC HH pads. All the foregoing of course with braided SS lines. This later combination IMO provides the most feel (control) and power at the least expense time and moola wise. The leverage ratio this combo offers (28.66) I think is ideal though it may not provide the greatest braking force.
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Old 08-09-2011, 11:23 AM
  #187  
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Originally Posted by Tweety
A nicely formated table, but he did lift about 75% of the information from this thread in the first place...
Guilty as charged, this was the source of most of the numbers I used, but I wanted to work out the physics hence the xl sheet.

If anybody wants to add to it i can e mail the original xl if you pm me your address
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Old 08-09-2011, 02:34 PM
  #188  
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Originally Posted by AMCQ46
Guilty as charged, this was the source of most of the numbers I used, but I wanted to work out the physics hence the xl sheet.

If anybody wants to add to it i can e mail the original xl if you pm me your address
Heh... It wasn't critiscism... Just an observation... And a half question about why it weas linked back to where the info originated...
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Old 08-09-2011, 02:46 PM
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Originally Posted by Tweety
Heh... It wasn't critiscism... Just an observation... And a half question about why it weas linked back to where the info originated...


Hey! back to my question? Please! So should I use a sp1 M/C? will just using the M/C and sticking with my stock calipers see any improvement?
What about any other M/C 's Brembo? maybe from an R1 ?

Thank you forum.
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Old 08-09-2011, 04:02 PM
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Originally Posted by speedkelly@aol.com
Hi Guys, quick question regrading the stock superhawk M/C. I like my brakes right now. Stock M/C and calipers with Galfer lines and EBC HH pads. All good, only issue I have is with the stock M/C. Is there any other stock Honda M/C that would work better that the stock Superhawk one? Thinking that maybe there are other stock Honda M/C that may offer better braking power or feel? Thanks all Steve
Really for the $$ I would just get a set of F4i calipers & MC off ebay.

I got my entire set for $70. Your stock calipers have such tiny pistons that if you upgrade to any better MC you will find that your leverage ratio will be drastically lowered, requiring lots more braking force that you are likely to want.
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Old 08-10-2011, 01:21 AM
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Originally Posted by speedkelly@aol.com
Hey! back to my question? Please! So should I use a sp1 M/C? will just using the M/C and sticking with my stock calipers see any improvement?
What about any other M/C 's Brembo? maybe from an R1 ?

Thank you forum.
Ok, ok...

Well... Like lazn said (although he said it different) mixing and matching isn't always a good thing... If you change the ratio between M/C and calipers, you change the entire feel... Sometimes a combination ends up being better, but usually not...

Also the stock calipers are, well, the only words that work are "puny" and/or "wimpy"... Plus, there are a lot more of pad materials to choose from if you have a CBR caliper...

So the best way to get more bang for your buck, is to get whatever CBR calipers you prefer, with a matching M/C... If you like, swapping the M/C one small size up or down will work nicely, but not large changes...

Oh, BTW... The CBR 929/954/1000 RR clutch M/C and the VTR clutch M/C is similar enough, that an aftermarket handle for the CBR (matching set) works just fine... That is if you want the handles to look the same... The stock Honda parts obviously also works...
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Old 08-10-2011, 05:25 AM
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Originally Posted by Tweety
Heh... It wasn't critiscism... Just an observation... And a half question about why it weas linked back to where the info originated...
dont worry, i didnt take it as a chritiscism..........but you make a good point with your 1/2 question
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Old 08-10-2011, 04:16 PM
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Ok. I guess I was not being very specific to what I may or may not benefit from in changing out M/C's.

Ok when upgrading my stock braking system I installed galfer brakes lines, EBC HH pads and a new CRG brake lever. Well CRG do not list a front brake lever for the Superhawk, but do list one for the CBR F4i. I figured that both M/C would be the same? The lever fits fine, but after reading this thread I noticed that the Superhawk & F4i M/C are different bore dia?
I have to install CRG levers on all the bikes I own beacuse I have XXL size hands, and use the CRG to push the lever away from the handlebar to get it where it feels most comfortable for me. I like the lever to be almost at the tips of my fingers. I also hate to have any access slop? or freeplay in the M/C or at the lever. I'm pretty expert at bleeding brakes. When I install lines I wrap all the bleed nipples with teflon tape, and always install a bleed nipples at the M/C if it does not have one.

Question I have is do you think or know? If I was to install the F4i M/C would I notice any difference in braking power? By having a large bore Dia? not sure exactly how the sicence works on M/C bore dia vs leverage ratio? To be honest I'm pretty happy with the stock set-up just curious if the CRG lever may work better with the F4i M/C and if the F4i M/C would improve my set-up that I already have?
Thank you forum.
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Old 08-11-2011, 02:15 AM
  #194  
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Originally Posted by speedkelly@aol.com
Ok. I guess I was not being very specific to what I may or may not benefit from in changing out M/C's.

Ok when upgrading my stock braking system I installed galfer brakes lines, EBC HH pads and a new CRG brake lever. Well CRG do not list a front brake lever for the Superhawk, but do list one for the CBR F4i. I figured that both M/C would be the same? The lever fits fine, but after reading this thread I noticed that the Superhawk & F4i M/C are different bore dia?
I have to install CRG levers on all the bikes I own beacuse I have XXL size hands, and use the CRG to push the lever away from the handlebar to get it where it feels most comfortable for me. I like the lever to be almost at the tips of my fingers. I also hate to have any access slop? or freeplay in the M/C or at the lever. I'm pretty expert at bleeding brakes. When I install lines I wrap all the bleed nipples with teflon tape, and always install a bleed nipples at the M/C if it does not have one.

Question I have is do you think or know? If I was to install the F4i M/C would I notice any difference in braking power? By having a large bore Dia? not sure exactly how the sicence works on M/C bore dia vs leverage ratio? To be honest I'm pretty happy with the stock set-up just curious if the CRG lever may work better with the F4i M/C and if the F4i M/C would improve my set-up that I already have?
Thank you forum.
Well... We already answered the question to some extent, but from a different view than the one you are looking at it... So lets try it from a another viewpoint altogether and you can make your own mind up...

The M/C bore relates to the calipers in the way that a larger bore makes the lever firmer, needing more effort with your hand, but shorter movement... The smaller bore VTR M/C takes less effort for the same pressure on the calipers, but it needs to travel further both to engage partially and to gain enough pressure to fully engage the brakes...

What that means for you is that if you keep the stock calipers, a larger bore M/C will give you better stopping power, and since the calipers are smaller than anything else, I doubt anyone will feel that it takes too much effort on the lever... But it also gives you less control, since the movement is less and combined with higher effort, it becomes more digital, ie brakes off - brakes on (and possibly locked) is a shorter transition...

Having a matched set of calipers and M/C gives you both good stopping power and control (in most cases)... Matching the small VTR M/C with larger calipers could be catastrophic, since in a lot of cases you would need the full stroke of the lever to engage the calipers fully... Mixing it the other way, is merely a matter of choice and opinion, it works and is perfectly safe, but you may not like the feel... A side effect of swapping to whatever CBR calipers are that brakepads are usually cheaper and you have a wider selection, but that's not the important part...

The levers for the various M/C's both brake and clutch are very similar on the Honda's, so if it fits to mount, I'm 99% sure it fits in any other respect... The difference in bore has no relation to the handle...

Now you got an explanation (brief) for the theory behind, so now you can make your own mind up on what to swap out...

Last edited by Tweety; 08-11-2011 at 02:20 AM.
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Old 08-11-2011, 07:33 AM
  #195  
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Originally Posted by Tweety
A nicely formated table, but he did lift about 75% of the information from this thread in the first place...
I'll give 75% to get 100% any day.

The table was the most important thing to me. I can actually figure mechanical advantage to an extent.

Most everything has something from somewhere else anyway.
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Old 08-22-2011, 07:40 AM
  #196  
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hey guys,

anyone running the later RC51 setups?? i read the entire 7 pages of this thread and it seemed like everyones running the sp1 setup, i dont know much about the mech advantage and such it was talking about on the spread sheet but it seems like regardless it will be a good mod.. anyone running this system let me know!

thanks
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Old 08-22-2011, 10:18 AM
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Originally Posted by Bearshawk
hey guys,

anyone running the later RC51 setups?? i read the entire 7 pages of this thread and it seemed like everyones running the sp1 setup, i dont know much about the mech advantage and such it was talking about on the spread sheet but it seems like regardless it will be a good mod.. anyone running this system let me know!

thanks
I have a complete SP2 system on mine and it works just fine....
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Old 08-22-2011, 01:22 PM
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Originally Posted by 8541Hawk
I have a complete SP2 system on mine and it works just fine....

thanks a ton, just the normal trimming of the fork leg or caliper mod and its bolt on?
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Old 08-22-2011, 02:36 PM
  #199  
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Yep
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Old 08-22-2011, 03:08 PM
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Old 09-12-2011, 12:00 PM
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ok brake gurus, i have a kz650 that i need a new MC on and since i have the VTR MC extra now i was contemplating putting it on and seeing how it works. the piston size for the kz is 41mm and the vtr's a 14mm MC

Front Master Cylinder Ratio Chart

i dont know enough to make a sound decision on if the vtr MC will work for me or not, the stock 650 MC is 5/8ths and the leverage comes out to 6.67, with the vtr's MC it goes up to 8.58... what exactly do these numbers mean in terms of braking?

right now my 650's brakes are awfully spongy and the MC leaks slowly, i have had the brakes bled and i have done it myself but its just time for a new MC and i thought i could use the VTR's

any and all help would be appreciated

thanks!
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Old 09-12-2011, 12:40 PM
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Originally Posted by Bearshawk
ok brake gurus, i have a kz650 that i need a new MC on and since i have the VTR MC extra now i was contemplating putting it on and seeing how it works. the piston size for the kz is 41mm and the vtr's a 14mm MC

Front Master Cylinder Ratio Chart

i dont know enough to make a sound decision on if the vtr MC will work for me or not, the stock 650 MC is 5/8ths and the leverage comes out to 6.67, with the vtr's MC it goes up to 8.58... what exactly do these numbers mean in terms of braking?

right now my 650's brakes are awfully spongy and the MC leaks slowly, i have had the brakes bled and i have done it myself but its just time for a new MC and i thought i could use the VTR's

any and all help would be appreciated

thanks!
Well your 5\8th or .625" master is equal to 15.875mm So the SH master would be even smaller, giving you even less stopping "power" though the lack of air bubbles from the leak might make it better.....
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Old 09-12-2011, 01:28 PM
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Originally Posted by 8541Hawk
Well your 5\8th or .625" master is equal to 15.875mm So the SH master would be even smaller, giving you even less stopping "power" though the lack of air bubbles from the leak might make it better.....

ahhhh soo the mc has to be at LEAST the same diameter (??) as the one its replacing in order to be viable to use, any modern bikes MC's that we know of are 5/8ths??

edit i remembered reading about this on page 1, and i looked back, sooo the F4i MC eh? interesting

Last edited by Bearshawk; 09-12-2011 at 01:30 PM. Reason: did a search myself ;)
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Old 09-12-2011, 01:45 PM
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There are lots of options but yeah you would want 5\8 or 16mm.

Just to broaden your search a little bit I also know that a 650 V-Strom (DL650) uses a 5\8ths front master.... and has a mirror mount on the clamp if that is needed on the bike you are looking to put it on.
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Old 09-12-2011, 01:55 PM
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Originally Posted by 8541Hawk
There are lots of options but yeah you would want 5\8 or 16mm.

Just to broaden your search a little bit I also know that a 650 V-Strom (DL650) uses a 5\8ths front master.... and has a mirror mount on the clamp if that is needed on the bike you are looking to put it on.

not a huge issue for me just looking for something that will work
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thats the beast its going on
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Old 09-12-2011, 02:04 PM
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Well to keep it simple, if you put a smaller bore master on, you will have more "feel" but less "power" in the brakes

A larger bore will do the opposite, Less "feel" and more "power"

The trick is finding what works best for you.

You don't want the brakes to be wooden (too much master) or overly "soft" (to little master) but like goldielocks..... just right.

Now what the master comes off of is not really an issue as most bars are 7\8" so it should bolt right on. You might have to do something with the brake light switch but even those terminals are pretty common on all of them.
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Old 09-12-2011, 02:10 PM
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Originally Posted by 8541Hawk
Well to keep it simple, if you put a smaller bore master on, you will have more "feel" but less "power" in the brakes

A larger bore will do the opposite, Less "feel" and more "power"

The trick is finding what works best for you.

You don't want the brakes to be wooden (too much master) or overly "soft" (to little master) but like goldielocks..... just right.

Now what the master comes off of is not really an issue as most bars are 7\8" so it should bolt right on. You might have to do something with the brake light switch but even those terminals are pretty common on all of them.
great ok, i might just try the VTR one out... due to the leak i have in my current one i might just try it out and bleed it well and see how it works, right now im getting the lever all the way back to the grip...
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Old 09-12-2011, 02:36 PM
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Originally Posted by 8541Hawk
Well to keep it simple, if you put a smaller bore master on, you will have more "feel" but less "power" in the brakes

A larger bore will do the opposite, Less "feel" and more "power"

The trick is finding what works best for you.

You don't want the brakes to be wooden (too much master) or overly "soft" (to little master) but like goldielocks..... just right.

Now what the master comes off of is not really an issue as most bars are 7\8" so it should bolt right on. You might have to do something with the brake light switch but even those terminals are pretty common on all of them.
Reverse that.. in MC: Smaller bore = more leverage (power), more lever travel, less feel. Larger bore = less leverage (power), less lever travel, more feel.
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Old 09-12-2011, 04:11 PM
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Originally Posted by lazn
Reverse that.. in MC: Smaller bore = more leverage (power), more lever travel, less feel. Larger bore = less leverage (power), less lever travel, more feel.

i thought so! i thought that the increased number on the chart meant more power, well thats exactly what i need more power the brakes suck
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Old 09-12-2011, 04:28 PM
  #210  
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Well then I would look for a 16mm or maybe a 3\4" master for the bike.
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