r1/r6 stock brembo with stock srad 6 potters

[TT750]

hey was thinking about putting a brembo master on this winter. just was curious if i should go for a newer r1 master from a r1 with 6 pots or is it same the same as the old 4 potters from the early mid 2000 r1/r6. The r6 carries the same pn but the r1 pn changes some when they go to 6 pots

09 r1 14B-W2587-00-00

05 r1 5VY-W2587-10-00

05 on r6 5SL-W2587-00-00

anyone ever look into this?

[Minibull]

I would say going with the later R1 one would be right. If Brembo make a deal of having the correct master cyl for the calipers, then going with a master cyl off a bike with 4 pots might not push enough fluid.
If you have done the 600 caliper swap then I'm sure any of the R6 type ones are fine.

[agg2001]

what size is the MC? i know the r6 is an 18mm, with two 4-piston calipers. the new r1 (09+) has 6-piston calipers (2 of em)... but i dont' think the master is any bigger. MAYBE a 19mm... but i'm not sure. i have had ZERO complaints about my stock MC on the r6... it's about the only part on the bike that's still stock actually. haha.

[mam37bl]

I used a radial R1 on my SRAD 750, no improvement, if anything less feel.

[K6trackday]

I think the original R1 brembo radial was only 16mm. Not sure on the newer ones though.

Also if you can find a cheap ducati 05+ radial they are much better upgrade and 18mm, the integrated res looks nice too.

[SPL170db]

The R6 and older R1 calipers have relatively smaller pistons in them (30mm and 27mm pistons in each). Not sure what the piston sizes are in the new 6-pot R1's. But bear in mind that piston surface area when choosing what size master cylinder to go with.

That, to a great deal, will affect the power and feel you have at the lever.

[Boss Man]

Originally Posted by TT750

hey was thinking about putting a brembo master on this winter. just was curious if i should go for a newer r1 master from a r1 with 6 pots or is it same the same as the old 4 potters from the early mid 2000 r1/r6. The r6 carries the same pn but the r1 pn changes some when they go to 6 pots

09 r1 14B-W2587-00-00

05 r1 5VY-W2587-10-00

05 on r6 5SL-W2587-00-00

anyone ever look into this?

I have. Does that mean I've found anything? well...

First of all, let me apologize for bumping an old thread. I hate bumping old threads; actually I don't, I hate getting yelled at for it.

I asked this very same question on an R1 forum a while back. I got no reply.

I personally believe Yamaha changes part numbers on similar items just so they can charge different prices, but that is neither here nor there...

Anyway, when I asked before, I noticed the different part numbers, so I checked the part numbers for the pistons inside the masters. They were also different. I just now checked and all of the model numbers have been superseded by... the exact same part number (2S3-W0041-00-00).

This means that the 05+ R6, 05-08 R1, and 09+ R1 all have the same piston diameter (16mm I believe, but I could be wrong. I can check mine tonight if it is important to you).

So now I look to the brake levers. Well all three models use a different part number. That's annoying. I then went to CRG's and Pazzo's website and they both say that the 05+ R6 and 05-08 R1 take the same aftermarket lever (which makes sense) and that the 09+ R1 uses a different lever.

So what that means is that for the 4 piston calipers, Yamaha uses similar front master cylinders, and the newer R1, with the 6 piston calipers, gets something else. For example (I am making these numbers up) let's say that the 4 pot masters are 16x20 then the newer R1 master could be 16x24 or something like that. My assumption is that they changed the lever ratio to pump more fluid into the (assumed) bigger 6 piston calipers. (Note: I put assumed because it is POSSIBLE to have 6 pistons with less area than 4)

Originally Posted by SPL170db

The R6 and older R1 calipers have relatively smaller pistons in them (30mm and 27mm pistons in each). Not sure what the piston sizes are in the new 6-pot R1's. But bear in mind that piston surface area when choosing what size master cylinder to go with.

That, to a great deal, will affect the power and feel you have at the lever.

This is exactly right. I don't know what the OP has, but the SRAD 600 calipers are 30mm and 27mm.

The SRAD 750's are 27mm 27mm and 24mm. I think that the slingshot 750's 6 pistons are all 27mm.

And not that it is related, but I think that all of the GSX-R Radial Tokico calipers are 34mm and 30mm, and I believe the new Brembo radials on the newer GSX-R's are all 32mm. Also, interestingly enough, both of these calipers have a greater surface area than the 6 piston SRAD calipers.

[TT750]

have 6 potters. and i can tell you that i got a cheap cnc lever from hong kong for the r6 radial on the wifes track bike and the ratio was off cause i could hit the bar almost with it bleed perfectly. put the stock lever on and tonnes of feel. I have yet to look at masters on the srad as i was thinking true brembo on the track machine and the r6 radial get moved to the srad or the gpx400r with cbr rr calipers on it.

[mlongo99]

If you're thinking of using a true Brembo on the track bike, I say go for it. I have the RCS on my SRAD (along with 600 4-pots and Vesrah RJL), and after riding my R6 with it's OEM Brembo, I want to dump it and get another RCS. The feel and leverage on my SRAD setup is far superior.

[TT750]

Its an 03 so i.figured a radial master would give the wife a bit more feel.. and for 50 it wasnt like i was brreaking the bank on it.

[Sleeper_750]

Originally Posted by mlongo99

If you're thinking of using a true Brembo on the track bike, I say go for it. I have the RCS on my SRAD (along with 600 4-pots and Vesrah RJL), and after riding my R6 with it's OEM Brembo, I want to dump it and get another RCS. The feel and leverage on my SRAD setup is far superior.

curious here, what ratio Brembo do you have?

[Lean With It]

Brembo on the track weapon can't tell you anything about mine though lol..dunno how to check it does appear I have an OEM brake lever though...

SBC Carbon pads
4 pots
ss lines
5.1 fluid

0 issues

[mlongo99]

Originally Posted by Sleeper_750

curious here, what ratio Brembo do you have?

19mm RCS from the mummy. I like the lever on the 20mm setting. https://www.motomummy.com/store/prod...cat=294&page=1