[fryingtonite]

Hi,

I fitted a complete set of GSXR K5 brakes and m/cyl with twin stainless lines to my 06. The result is quite disappointing and probably not as good as the original setup. I am sure there is no air in the lines...anyone else had this?

many thanks

Tim

 

[Martin_R]

Say it ain't so!
:-D

I am just waiting for the braided lines to arrive. Otherwise my setup is K5 calipers + K6 master cylinder.

Hibernation season still for a month or two, so can't comment on the brakes just yet.

So what is the problem you are having? Mushiness? Are you running new pads?

Did you bleed calipers->reservoir or reservoir->calipers. For sure the ancient squeeze-open-squeeze-open-squeeze method of bleeding will not work. It never has.

 

[Devious2XS]

Something must be off.
When I switched to the GSXR setup, the difference was night and day. The initial bite increased and the "progressive" braking went away completely.

 

[fryingtonite]

I used a Mityvac vacuum brake bleeder from all three bleed points (calipers and m'cyl), as well as manually bleeding. I've found that overdoing it on the vacuum bleeder will just draw air in past the threads of the nipples and stright back up the bleed line. I don't believe there's any air in there now.

The pads aren't new, so they may need to bed into the exisiting contour of the disc surface, but even so..I've done about 50 miles on them and no sign of improvment.

 

[Martin_R]

On 2007-01-16 07:38, fryingtonite wrote:
I've found that overdoing it on the vacuum bleeder will just draw air in past the threads of the nipples and stright back up the bleed line.

Teflon tape on the nipple threads will prevent this.

I don't believe there's any air in there now.

Either there is air or the master cyl or calipers you got have leaking/broken seals. My bet is on the air, if you have not noticed any brake fluid leaks and you are using the correct DOT4 fluid.

One thing to ***** out the brakes is a master cylinder piston seal that has been assembled backwards or has somehow managed to flex enough on it's own. Very unlikely on a 2005-> brake system though, unless someone has disassembled the cylinder assembly at some point.

Did your GSXR system come from eBay or someone you know and could ask about the history a bit?

 

[ssregal39]

you can't use a mity vac. the only way is pressure from the master cylinder.

 

[Kajota]

On 2007-01-16 05:28, fryingtonite wrote:
Hi,

I fitted a complete set of GSXR K5 brakes and m/cyl with twin stainless lines to my 06. The result is quite disappointing and probably not as good as the original setup. I am sure there is no air in the lines...anyone else had this?

many thanks

Tim

I've got about 300 miles on my S3 since swapping out the entire front brake system with that from a GSXR.(+custom brake lines). The brakes are much better. I also installed brand new Vesrah brake pads.

 

[Martin_R]

On 2007-01-16 08:19, ssregal39 wrote:
you can't use a mity vac. the only way is pressure from the master cylinder.

Forcing fluid up the caliper nipples with a king size syringe has worked much better for me.

If with "pressure from master cylinder" you refer to the basic manual bleed method, then I would say that is by far the most laboursome method.

What is the failure point in MityVac version? It does not get all the air from the master cylinder as the master cylinder piston is not forcing the bubbles out of the chamber? There is a bleed nipple on the highest point of the GSXR master cylinder for removing this pocket of air.

 

[chefjpd]

The problem is most definately the used pads. I used the old pads on my hyabusa calipers, and the bite was horrible. Changed them to a new set of ebc HH pads and now it is impeccable.

 

[DEcosse]

There is definitely something wrong with your own situation - these should be perfect.
One mistake I saw with a friend's install was that he had the calipers on the wrong sides - when installed the bleed nipples should be at the top. If they're at the bottom, you need to swap them around to the opposite side rotors to get them oriented correctly.
Don't know if that's your problem, but worth suggesting maybe.

 

[kuhlka]

Keep in mind, any brake parts found on ebay from a GSXR or other known squid bike is likely to have been beaten to hell. Check our threads and pressure on the bleed nipples (might be stripped and leaky) also change out the pads for some EBC HH pads or similar compound and you should be golden for braking power. Mine have a tiny amount of mush at this point, but anytime that happens it is usually sorted with a small bottle by using the lever to pump out the few air bubbles that have collected at the master cylinder.

 

[gr8shandini]

I did a Tokico swap from a Kawi and retained the stock MC. Works far better than stock. Bites hard and keeps my lever stiff (now if I can just find a gal that'll do the same). I did lose a little bit of "feel" however. It got better as the pads bedded in, but still they were used pads. I think it'll get better when I get around to putting some new ones on.

As for bleeding, I got one word for you: Speedbleeders. Great product. If they were public, I'd buy stock in 'em.

 

[HiVel]

IF SUZUKI BRAKES ARE SO FRIGGIN WONDERFUL , WHY
ARE ALL THESE GUYS SELLING THEM FOR NEXT TO NOTHING ???
LATEST ISSUE OF PB MAG SEZ THE TRIUMPH 675 BRAKES PUT THE '07 SUZUKI GSX750 BRAKES ON THE TRAILER. THEY ARE ALL JAPANESE MADE AND THUSLY PRETTY DARN GOOD. I LIKE MY UPDATED (NEW PISTONS) '06 TRIPLE BRAKES A LOT. I SURE AS HECK CAN STOP THAT DUDE!
YOU PAYS YOUR MONEY AND TAKES YOUR PICK.

 

[DEcosse]

On 2007-01-16 19:51, HiVel wrote:
IF SUZUKI BRAKES ARE SO FRIGGIN WONDERFUL , WHY
ARE ALL THESE GUYS SELLING THEM FOR NEXT TO NOTHING ???
...

NO NEED TO SHOUT!!!!!!!!

They sell for one of three reasons
1) Off wrecked bike (common occurrence on comon bike, especially in hands of kids!)
2) People break GSXRs because they're worth more in pieces than whole - My complete front end (forks & brakes) came off a zero mile bike
3) Racers who can install Brembos

GSXR Tokico calipers will perform better on a Triumph with 320mm rotors than on a GSXR with 310's.
But I don't believe anyone is claiming a performance upgrade of the Tokicos versus the Nissins now that the Nissin piston issue has finally been resolved.
The replacement was being done as a good fix to resolve the problem that Triumph buried their heads in the sand over
i.e. the soggy brake lever due to sticking pistons in the Nissin calipers - oh wait, sorry - Progressive brake.

The pad selection will make a significant difference in performance.
I would also consider the bigger 3/4" (& Radial!) Master Cylinder an improvement over the Triumph MC.

On 2007-01-16 19:06, kuhlka wrote:
Keep in mind, any brake parts found on ebay from a GSXR or other known squid bike is likely to have been beaten to hell. ....

I can't disagree more - see my comments above. My calipers were brand spanking new - the pads were not even scuffed in.
With parts sourced from a K6, even if not necessarily new, like mine, I think your statement is more likely to be exception than the norm.
I think TSC17 would agree with me - check his out too - his also almost new per his description.

It's moot point now anyway - can't see any reason to change now that Triumph has finally accepted responsibility for the issue & providing a FOC replacement of the pistons on the Nissins - unless anyone thinks Black looks better than Gold! :-D

[ This message was edited by: DEcosse on 2007-01-16 20:34 ]

 

[motorcritter]

what's the cure? i was going to go to brembos (ala ducati) or the japanese stuff, bleeding and pads aren't working. please enlighten me while it is still wrench weather. if there is a stock fix or upgrade, let me know.

 

[fryingtonite]

OK,

I did install the calipers with the bleed nipples at the top, it seemed the logical thing to do. There is no fluid escaping from the system anywhere so no air is entering it.

EBC HH pads ordered and we will see. The old brakes did work if you tugged on 'em hard but there was no initial bite or feel. On my Fazer 1000, I could play tunes on the brakes, they were outstanding. Once a benchmark has been established, you don't want to drop below it do you..

:-D

Tim

 

[Martin_R]

On 2007-01-16 08:19, ssregal39 wrote:
you can't use a mity vac. the only way is pressure from the master cylinder.

On 2007-01-16 08:49, Martin_R wrote:
Forcing fluid up the caliper nipples with a king size syringe has worked much better for me.

I take it back. The feeding up from the caliper nipples method definitely does not work with the Tokicos as the nipple sits on top of the caliper.

I just filled & bled the brakes and there were some really stubborn air pockets somewhere. ssregal39 was right. The old school squeeze-open-squeeze-open-squeeze method finally got the air out.

3 hours, half pack of cigarettes and 2 bottles of brake fluid later.
:-D

And afterwards I noticed that the way I routed the master cyl banjos has them a bit too close for comfort to the brake lever brake light switch doo dah. But the hell with it, I rather get killed if the lever catches on the banjo, than reroute and do the bleeding again.


[ This message was edited by: Martin_R on 2007-01-19 15:10 ]