2002 with '04 Radial Forks and Brembo M4's - Kawasaki Forum :: KawasakiWorld.com
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post #1 of 16 Old 03-21-2017, 09:20 AM Thread Starter
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2002 with '04 Radial Forks and Brembo M4's

Hello Guys,
First, I've been a registered user for years, but my post up number is very low. Google has brought me here many times through the years though.

I'll try to be succinct.
2002 model, with OEM radial forks from a private seller.
I bought Brembo M4's to mount to it.
I have my OEM 320mm rotors, still straight, still within spec, so I want to keep using them.
Brembo does not state compatibility with the '04+ ZX12R's. Dunno why not. 108mm bolt pitch works.
It must be in the rotor diameter.
'04+ has 300mm, I have 320mm.
One Facebook guy says he heard 10mm spacers for 320mm rotors, but he was using 7mm.
If 10mm spacers were recommended, then the 300mm should've worked and Brembo would've listed them compatible.

Does anyone have the Brembos and/or can confirm spacer or rotor diameter requirement?

Forks are still with Traxxion Dynamics, so I can't dry fit yet.

Thanks!
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post #2 of 16 Old 03-21-2017, 11:53 AM
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Quote:
Originally Posted by quinocampa View Post
Hello Guys,
First, I've been a registered user for years, but my post up number is very low. Google has brought me here many times through the years though.

I'll try to be succinct.
2002 model, with OEM radial forks from a private seller.
I bought Brembo M4's to mount to it.
I have my OEM 320mm rotors, still straight, still within spec, so I want to keep using them.
Brembo does not state compatibility with the '04+ ZX12R's. Dunno why not. 108mm bolt pitch works.
It must be in the rotor diameter.
'04+ has 300mm, I have 320mm.
One Facebook guy says he heard 10mm spacers for 320mm rotors, but he was using 7mm.
If 10mm spacers were recommended, then the 300mm should've worked and Brembo would've listed them compatible.

Does anyone have the Brembos and/or can confirm spacer or rotor diameter requirement?

Forks are still with Traxxion Dynamics, so I can't dry fit yet.

Thanks!
if you have 320 rotors and want to fit radial calipers you need 10mm spacers. The standard radial set up on the zx12 has 300 rotors so you need to move your calipers out to accommodate the bigger rotor.
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post #3 of 16 Old 03-21-2017, 12:06 PM
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Arc of the Brembo pads won't match the arc of a 300mm rotor perfectly. Also 7mm spacer may put the pad in the sweet spot of that other persons rotor. Take a pad and see how it lines up on your rotor.
Should have no issues though.

cmg
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post #4 of 16 Old 03-21-2017, 12:44 PM Thread Starter
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Redwon, this seemed sensible to me too, but Brembo would've said it was a direct fit with no spacers needed.
They have all sorts of spacer kits for different bikes, but afaik sportbikes only have 300, 310, or 320mm rotors...right?
So perhaps it's more like cmg is saying, they'll fit up, but there'll be an arc wear issue.

cmg, the "other person's rotor" was a 320mm. I agree, I'm just going to have to take a look.
The unfortunate thing is that I wanted to have the spacers on hand when my forks get back, but I might not be able to do that.
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post #5 of 16 Old 03-21-2017, 03:23 PM
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Hi Quinocampa, I would be interested in how you get on. I have just got a pair of Radial forks and tokico 4 pots calipers for my 2003 ZX12 and want to swap to M4. @redwon I'm going to order my 10mm spacers before i fit them.
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post #6 of 16 Old 03-21-2017, 11:32 PM
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Keep in mind the bolt lengths when using spacers.
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'You fools, you smashed me with your iron horse'.
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post #7 of 16 Old 03-22-2017, 01:56 AM
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Quote:
Originally Posted by GazzaZedHead View Post
Keep in mind the bolt lengths when using spacers.
Yes! this is really important. I measured the standard bolt and ordered 10mm longer to accommodate the spacer.
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post #8 of 16 Old 03-22-2017, 04:43 AM
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I had the same problem when I got a set of R1 calipers I had to either had a spacer or change the rotors themselves to 300.
I put nissin on from a zzr14 or a zx10r they bolted straight on :)

like CMG said bolt them on and look to see the right size spacer you need and length of bolt too
also think about the brake lines themselves as they will be bolted on in a different place which may make them too short ?

Bri . . . .
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post #9 of 16 Old 03-22-2017, 05:36 AM Thread Starter
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I have already purchased 70mm bolts, and I think 60mm are standard? This has been bugging me for a month.
@Factory, I will be sure to post up when I have an answer. What bothers me the most is that I have to buy something
from the UK, with the delays, and they're spendy. I work at a company with a large machine shop, and we even have
adequate spacers in inventory for a different application, but they're meant for assemblies and are not sold alone.
I don't have any maintained relationships with the machinists any longer, or I would ask for something on the side.
The spacers we have cost only $0.75! Can't swipe them either -- cameras.

I intend to mount them up, then measure the gap with calipers, then order spacers and wait another 2 weeks.
You know how it is, waiting for the mail...and it's the start of riding season...and it's a functional part...
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post #10 of 16 Old 03-23-2017, 03:28 PM
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Yeh don't we know it, time ticking quickly. Ok so I will order some 70mm bolts as well as I don't want to swap the rotors. I appreciate all your inputs guys.
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post #11 of 16 Old 03-29-2017, 08:02 AM Thread Starter
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Here is my complaint of the day, or month.

The used radial forks I bought were sent to Traxxion Dynamics, a race-spec shop who overhauls forks with upgraded springs and cartridges.
After having spent the money on the OEM forks, TD tells me they have over 0.030" runout and have damaged tubes. They called them
"trash" and will not repair or upgrade. Incidentally, they had them for over a month before giving me this news, and giving me delaying
messages on status 3 times. Not their fault they're damaged, and I understand the enhancements wouldn't be functional with non-straight tubes.

My seller is considering repayment to me at this time, no clear decision yet. TD says that kind of runout could only come from a crash,
but seller said he bought a parts bike that included them.

At this time, the only option I have is to buy new forks from Kawasaki, in order to get radial mounts for my on-hand Brembo M4's.
Cost to me from Partzilla is $1783.30. Yeah. And, AND!...no upgrades, just straight OEM forks. TD's upgrades -- cartridges and springs --
would be $995 plus labor.

I've already sunk more into the bike than what I paid for it in 2003, for this rehab project. We all know how rare used '04-'05 forks in
good condition are. There are 2 pair on ebay atm, one has been painted black and is badly peeled, the other is in a full triple tree assembly
and looks either very dirty or otherwise compromised. You can't tell. Once bitten twice shy though.

My upgrade project is grinding to a halt without a decision on the Partzilla price.
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post #12 of 16 Old 03-29-2017, 08:56 AM
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Why not buy new lowers and reuse your uppers? Almost half the cost.

2004 Kawasaki NINJA ZX-12R (ZX1200-B3) Front Fork(B3/B4) | Powersports Discount

I live nearby this dealer and they have the lowest prices on OEM parts. When I go in to order I usually get another 10%-15% off their website price.
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post #13 of 16 Old 03-29-2017, 05:32 PM
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Agreed, buy the lowers only?

2006 ZX-12R B6F
Ohlins / TRAXXION Dynamics / NISSIN / HEL / Power Commander / Bear Racing / Akrapovic / BMC / Muzzy / Healtech / ERMAX / Helibars / GSG / R&G / NUI Racing
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post #14 of 16 Old 03-31-2017, 10:47 AM Thread Starter
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@MetalMagician
@SteveW

I considered buying either uppers or lowers, but Traxxion Dynamics told me both were damaged and they would do with either.
So I went ahead and bought the OEM forks from Partzilla.

@MetalMagician, if you look at the link you sent, you can see that the fork set number, 44075-0017, has no price. Kawasaki has discontinued that part number.
Partzilla discovered this during a phone call I had with them. There are now new part numbers for the left and right, you have to buy each, instead of a set.
And, as I said, the total price went up.

I will try to make up the difference in my cost by selling my old 2002 blue plastics. I bought a kit in a new color from Auctmarts. At the moment, I am pretty
happy with it, with a couple minor exceptions. I might do a full review of them when my bike is complete.

I appreciate your moral support, truly!!!
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post #15 of 16 Old 03-31-2017, 11:09 AM
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Are you getting the AK-20 kit from Traxxion? Thats what I have in my forks and I'm very happy with it. Money well spent along with my rear Ohlins shock.

2006 ZX-12R B6F
Ohlins / TRAXXION Dynamics / NISSIN / HEL / Power Commander / Bear Racing / Akrapovic / BMC / Muzzy / Healtech / ERMAX / Helibars / GSG / R&G / NUI Racing
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