Brake upgradE

[salty_monk]

Measured at last!

First, I couldn't really measure disc outside diameter so I took this off a replacement disc's spec: 276mm.

So the measurements I took, and these are all on the left fork leg:



Axle centre to lower calliper bolt centre: 75mm



Calliper bolts centre to centre: 72mm



Outside of disc including the bracket that sits on top of it to inner side of fork: 35mm



Edge of wheel to inner side of fork: 41mm

Note my completely inaccurate measuring device (steel ruler) as I don't have vernier callipers at the moment unfortunately, so all these measurements may not be 100% accurate, but I'm guessing they should still indicate if your existing brackets will fit.

Pete,

Had a measure up today & I would say there is a better than 98% chance that the brackets will fit "as is".

The 2% is in the rotor offset but I think that part number crosses with the GS1000G too so should be fine.

Dan
Dan

[Cdnpt1]

Ok, so if I am reading that correctly, with your bracket we could fit a GS1000G rotor and caliper?

[salty_monk]

No... you could fit a Kawasaki Ninja/Concourse twin pot caliper & a Honda CBR F3 Rotor.

[Cdnpt1]

Would the rotor fit without mods or an adapter? I don't know much about either of those bikes, any ninja twinpot caliper? Does the year matter on either part? It is the cbr600 f3 right? Sorry for my cluelesness on this. What is the cost of the bracket to set this up?

[pete]

Thanks Dan this is awesome to know

I'm just digging around at the moment to find the correct thread with the correct up to date info in it as the searching is returning quite a few results that are wild goose chases...

[pete]

Ok, looks like this is the best summary I've seen, post #11 on this page:

http://www.thegsresources.com/_forum/showthread.php?t=140253&highlight=twinpot&page=2

To fit this swap.. you just need to get a kit from me, some CBR F3 Rotors & Some Kawasaki twinpot pistons.

You can probably budget:

$30 - $50 on calipers depending on rebuild status, Ebay skills (They were used from about 87 up to 97 so it depends what year you get. Al ot of early ones need new pin rubbers although seals are generally ok).
$30 - $40 on brake pads. (I actually got one set of calipers for $30 with a set of useable pads once...)
$50 - $100 on CBR Rotors (depending on your Ebay skills)
$110 - 120 for the brackets, spacers & bolts. Depending on location, how you send the money etc.

Takes probably 3 or 4 hours to do it the first time as you have to re-drill the rotors using a drilling jig etc.

Well worth the money & effort.

Of course for us 450 guys it's one caliper, one set of pads, one rotor, and one bracket.

Dan, what exactly is the deal with drilling the rotors? I've seen it mentioned in many threads about this but I still haven't located the actual details yet...

[Cdnpt1]

Thanks Pete, I think I remember seeing something about drilling but not sure if it was in reference to this, I will have to look after work. My brakes feel pretty good now but I am going to keep this in mind for later, I have to plug a hole in my fuel tank first

I think this quote has the info we need.

The rotors I am using are the same diameter as the 550 rotors... 294mm from memory.

If you look at my bracket posts you'll see Don has been messing with a 550 single disk setup using my bracket, a kawasaki twinpot & a 98 Honda CBR 900RR disk that I supplied him with. That disk has the same offset & PCD as the stock Suzuki but it's a 310mm dia disk. They are very rare though & be aware they are directional so you need a left & a right. A set will likely run you at least $120 on Ebay, maybe more.

That Honda disk is the closest you'll come to a perfect fit on the stock wheel. The centre hole is about 2mm too big so you have to centre it on the bolts. You also have to drill out the bolt holes to 8mm.
If you can work out some brackets to work with your calipers & those disks it would probably be the easiest way to do it.

Can you post a pic of the Calipers? I believe the newest year for the ones that work with my brackets are about 1989 or 1990.
Are they opposed piston type? I would be surprised if they are & there is room. I think there is a more modern caliper that's not opposed on one of the Ninja's... maybe it's one of those. The SV650 also has non-opposed piston calipers.

Dan

[pete]

Thanks Pete, I think I remember seeing something about drilling but not sure if it was in reference to this, I will have to look after work. My brakes feel pretty good now but I am going to keep this in mind for later, I have to plug a hole in my fuel tank first

I think this quote has the info we need.

Cool that sounds like it, I didn't trawl the thread enough obviously...

I just realised... I have to replace my rotor and disc pads as it stands... hmmmm... I wonder how a custom bracket holding a brake caliper would go for a safety certificate? I will have to do some research...

[Cdnpt1]

Cool that sounds like it, I didn't trawl the thread enough obviously...

I just realised... I have to replace my rotor and disc pads as it stands... hmmmm... I wonder how a custom bracket holding a brake caliper would go for a safety certificate? I will have to do some research...

Hmmmm, never thoight of that, but we have this wonderful "classic" registration for vehicles over 20 years old, takes a bit longer and some photos to get it, but once you have it you don't have to get safety inspections anymore. There is nothing like that in Aus?

[pete]

Hmmmm, never thoight of that, but we have this wonderful "classic" registration for vehicles over 20 years old, takes a bit longer and some photos to get it, but once you have it you don't have to get safety inspections anymore. There is nothing like that in Aus?

We do have club rego's and things like that but it really restricts when you can ride.

I believe it's a matter of only riding in official club events and directly to and from a mechanic etc., so it rules out the "I feel like a ride today" rides which would really suck...

[Cdnpt1]

That really does! We are lucky in that as long as you ride right, you never get checked for inspectionn here. I have only been caught once in 15 years and i had the bad luck to come upon a seatbelt check and got written up. Better safe than sorry though.

[pete]

That really does! We are lucky in that as long as you ride right, you never get checked for inspectionn here. I have only been caught once in 15 years and i had the bad luck to come upon a seatbelt check and got written up. Better safe than sorry though.

They have their moments here, sometimes they go on a rampage and book everyone, other times you can drive what you want, where you want, how you want and you'll never get picked up... very sporadic.

Bikes tend to get targetted fairly frequently over here though, more so than cars anyway.

[salty_monk]

No problem with this sort of mod in the UK MOT system - as long as the brakes can be shown to work to a minimum requirement...

[pete]

No problem with this sort of mod in the UK MOT system - as long as the brakes can be shown to work to a minimum requirement...

I need to read through the ADR document again. I've done that already to ascertain that my pipe and pod filters are legal, but I didn't look at the braking section...

I expect I'll probably just get a new disc and go with my freshly rebuild ones for the sake of time (really want this bike done!) but I'll look regardless... it might also inspire me to just do it...