GSXR 4 piston Tokico brake caliper

16078 Views 39 Replies 9 Participants Last post by old3, Apr 9, 2013

old3

Discussion Starter · Feb 5, 2013 (Edited)

It is on! Works better than the stocker with HH pads already, and it is 17f for my ride home with them. They can only get better as the tires can heat up. Feel is way up, it is a true 2 finger brake now.

My biggest complaint with the stock cal was how it lacked feel, especially as the longer stops got towards the end, they would go numb. This just bites right to the end, and modulation thru the lever is super controlled. As it warms up I might be tempted to try a master with a mm or two bigger piston but it will be a matter of fine tuning, it is right at the goal line now.

My buddy is a master machinist, and it took us, (really him,

) most of 7 hours to design, fab and fit the bracket. Now that we have a prototype, I asked if he would want to sell them. He suggested that steel brackets would be easier to build and that might keep it affordable.

If there is interest I'll see if he is willing to build a few more. It was done as a favor to me, he usually is building factory parts or stuff for aircraft.

You have to click for the pic for some reason?

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old3

Discussion Starter · #21 · Feb 6, 2013 (Edited)

My son (2012 Ninja 250 owner, stock brakes, MX racer since he was 5) took it out up & down the street to feel the brake. He really got it good & hot, 60 MPH to dead stop in aggressive braking about a dozen times. I guess he really finished off seating the pads cause it is now a real 1 finger brake. I managed a nice 2' front skid while testing a new tune.

Very controlled, felt it, released it and right on down the road. Frigid tires, cold road, salt brine is down for a new storm blowing in...Do not try this at home!

I'm thinking the 1/2" or 13mm stock master might be spot on now. I'm not saying I won't try the 14mm, but if these pads get any better as they wear in, I probably won't.

My other set of HH EBC pads just kept getting better & better over 150-200 miles. These have under 35 miles in them.

cbzdel

· #22 · Feb 6, 2013

Great work us on on mod no one else can have unless they know a master machinist haha

old3

Discussion Starter · #23 · Feb 6, 2013

Sorry buddy! My kid got the caliper nice & hot, the mount wasn't even warm. I'm sure it'll take some heat too in heavy use in summer.

Funny thing, my friend said a radial or post mount caliper would be even easier to adapt. Maybe we should play with later model GSXR calipers? I think they went radial in 2004.

cbzdel

· #24 · Feb 14, 2013

bump for an update, is he gonna make these thing for us

SSR just raised their price up to $100 for the bracket.. So now this would for sure be a WIN price wise..

old3

Discussion Starter · #25 · Feb 14, 2013

We are either going riding tomorrow or working on a copy, so stay tuned! I haven't been on the bike for a fun ride in weeks and they say mid 40s so it could go either way.

cbzdel

· #26 · Feb 14, 2013

Hoping for snow tomorrow so you can build me a prototype

haha

I really want to get in a good ride, I need the snow to melt up in the mountains..

old3

Discussion Starter · #27 · Feb 14, 2013

Well, he mentioned it as a possible activity for tomorrow so I'll let ya know for sure either way.

cbzdel

· #28 · Feb 14, 2013

Just read online that these years all all the same mounting points:

2001 – 2002 GSXR1000
2000 - 2003 GSXR750
2001 - 2003 GSXR600

But here is the kicker, the GSXR600/750 has a 4 piston caliper, and the GSXR1000 has a 6 piston caliper.. Goes onto talking that the GSXR1000 caliper is a huge improvement over the 600/750 caliper, and also a VERY popular upgrade..

So if you are able to get these brackets made I will for sure want to try out a GSXR 1000 caliper

old3

Discussion Starter · #29 · Feb 14, 2013

That will likely require a bigger master, I think I linked that 14mm on ebay earlier? Anyway, from my last ride after the pads got really hot, I am probably sticking with the stock 13mm master now unless extreme summer heat gives me a lot more tire traction. Feel is great and the power/bite is spot on.

cbzdel

· #30 · Feb 14, 2013

Maybe I will get the 4 piston to get it up and running first then.. Dont want to go to far ahead and have to re-do everything only to have more down time...

I have not had fairing on my bike in probably 6 weeks, I keep getting parts in the mail so I didnt want to put it back together only to take it apart haha

Brother Michigan

· #31 · Feb 14, 2013

Is it just me or do these things sound WAY too aggressive for the 300? Better feel is nice, but it sounds like it locks up much too easily.

old3

Discussion Starter · #32 · Feb 14, 2013

You have to ride with good brakes to understand. You'd also have to be pretty ham fisted to not be able to appreciate it. 4 fingers and the lever to the bar while you hold your breath and pucker is no way to be riding!

fallingbomb

· #33 · Feb 15, 2013

Brother Michigan said:
Is it just me or do these things sound WAY too aggressive for the 300? Better feel is nice, but it sounds like it locks up much too easily.

I doubt it locks up that easy from say 90 MPH. The brakes on the 300 feel very weak compared to my CBR. It's nice to be able to get the front near locking/llifting the rear without having to squeeze so hard too.

cbzdel

· #34 · Feb 20, 2013

Give me the good news on the prototype

Brother Michigan

· #35 · Feb 20, 2013

fallingbomb said:
I doubt it locks up that easy from say 90 MPH. The brakes on the 300 feel very weak compared to my CBR. It's nice to be able to get the front near locking/llifting the rear without having to squeeze so hard too.

It will lock up just as easily at 90 mph as 20 mph, it's just that the deceleration at those speeds is less noticeable (i.e. relative decrease in speed) and you don't come to a stop as quickly, obviously.

I'm not arguing that the brakes on the 300 lack room from improvement, but locking up the front shouldn't occur until near the end of the travel of the brake lever, otherwise the benefits of feel and linear response are entirely wasted.

old3

Discussion Starter · #36 · Feb 20, 2013

Brother Michigan said:
Is it just me or do these things sound WAY too aggressive for the 300? Better feel is nice, but it sounds like it locks up much too easily.

What makes you think this? I had it lock once up front while hitting them pretty hard on a cold road on cold sport tires. I've been pounding on them ever since and they are super good feel/feedback wise.

Brother Michigan

· #37 · Feb 20, 2013

old3 said:
What makes you think this? I had it lock once up front while hitting them pretty hard on a cold road on cold sport tires. I've been pounding on them ever since and they are super good feel/feedback wise.

Your posts make it sound like you're locking up with just two fingers with only moderate pressure. The "one finger brake" description only helps.

If you claim they're not too aggressive and you're not locking it up every time you exhale just a little too hard, then consider my criticisms retracted.

old3

Discussion Starter · #38 · Feb 20, 2013

Brother Michigan said:
Your posts make it sound like you're locking up with just two fingers with only moderate pressure. The "one finger brake" description only helps.

If you claim they're not too aggressive and you're not locking it up every time you exhale just a little too hard, then consider my criticisms retracted.

Oh, no way, LOL! The time I locked it up there was fresh salt water on the ice cold streets in storm prep and the tire was ice cold too. I could also feel it thru the lever, unlike the stocker which IMO has too much master cylinder piston diameter for the 2 pistons. I bet an 11mm would feel a lot better with the stock caliper. It is so numb stock, and especially with the rubber hose.

You'd get on my bike and adjust to it within a few minutes. When my son was riding it he was doing full blown emergency stop drills and I don't think he locked it once. I've been doing the same and great results, I can't wait till I can get the tires hot again on a clean, unsalty or gravel & sand covered street.

Reactions: 1

mtran

· #39 · Apr 8, 2013

Just wondering if your friend was still going to make a small batch of brackets?

old3

Discussion Starter · #40 · Apr 9, 2013

Geez, I haven't heard from him in a good while. I'll try to reach out to him this week.

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