Help- ordered wrong brake rotors

[fjfool]

well i am trudging along on this wheel conversion and made a big(but fixable) mistake
wrong rotors
the mistake: well, its a '91 FZR1000 wheel, so get some EBC replacement rotors for a FZR 1000, right?!?......wrong- that aint gonna work
so much for the "simpleton" method

the ones i ordered are 320mm

will a 300mm rotor fit? or does it have to be 286mm?

i am fishing for guidance here as i have concerns with not only the diameter of the rotor but also the "offset"- the stock FZR rotor was flat, the EBC rotor "stood off" the hub mount, approx 1/4"
i will be using FJ forks (i think, will start another thread for that) and Blue Dot calipers

i will talk to EBC today but, i dont think they will be as much help as it is a custom application, more or less born here by FJ owners

help please, i blew it trying to do it myself

p.s. the EBC rotors i bought are   "MD2003XC"

thank you!

[craigo]

If you were to use FZR1000 forks, would that fix the problem?

If so, there is a nice pair on Ebay for $80...

http://www.ebay.com/itm/1988-Yamaha-FZR1000-Forks-/321655030912?pt=Motorcycles_Parts_Accessories&hash=item4ae4224480

Someone here should know better than I. Just throwing this out there as a possibility.

CraigO

[aviationfred]

Many members use the 300mm Arashi wave rotors. They are plentiful on eBay and work very well.

http://www.ebay.com/itm/2-New-Front-Brake-Rotor-Disc-for-YAMAHA-TDM850-TRX850-FZ750-GENESIS-FJ1200-Gold-/141209740827?pt=Motorcycles_Parts_Accessories&fits=Model%3AFJ1200&hash=item20e0c1a61b&vxp=mtr#ht_3866wt_1161


They come in 2 colors, gold and black. Here is a photo of both colors on the two 1989's. Mine is the white one and it does have a '88 FZR750R front wheel.



Fred

[Flynt]

If you were to use FZR1000 forks, would that fix the problem?

The YZF750r USD forks solve this issue as well...  and get the chicks!

Frank

[aviationfred]

Another point..... Have you factored in that the '91 FZR wheel bearings use a 17mm dia. axle, versus the 15mm dia. axle that the FJ uses?? I don't believe the OEM FJ bearings will fit into the '91 FZR wheel.


Fred

[Mark Olson]

If you were to use FZR1000 forks, would that fix the problem?

The YZF750r USD forks solve this issue as well...  and get the chicks!

Frank

Fzr1000 forks will create more problems , they are not a direct swap.  I went thru this so I know.

[fjfool]

as always, thanks for all the input!
wow, Ben at EBC America was fantastically patient and helpful
looks like the ones for the '89-'92 will bolt right on to the FZR wheel
there is a difference of .16mm on the offset but, i am sure i can deal with that
we had a good laugh, sigh, at my expense, about how the good deal i got on the rotors will be out weighed by the return shipping costs,
- its just the way i do things

and yes, my last name does end with a "ski"
funny how that works

[fjfool]

Another point..... Have you factored in that the '91 FZR wheel bearings use a 17mm dia. axle, versus the 15mm dia. axle that the FJ uses?? I don't believe the OEM FJ bearings will fit into the '91 FZR wheel.


Fred

yes, will use the FZR bearings and have the fork lowers bored the extra 2mm by a machinist
i must thank Mike Ramos for letting me in on this simple and cheap solution- this way the FZR speedo drive works

gonna have to get this and the rear yzf wheel to the machinist - i always look forward to this, my machinist is the local v-twin guy, he is a fantastic resource - burned out hewlett packard engineer, the guy is a genuis and has a strange respect for my "Jap" bikes, we get along great but, his customers just dont know how to deal with me.
generally they just snort in my general direction, i think they want to hate me but they keep it cool for for the owner, my ears always burn when i leave, heh
btw, i wear full gear - this might be part of the reason
i know i can take 99% of them on my 400 on the roads up here, i think they know it too- sorry for the rant but, never underestimate the small displacement Jap bike
i guess thats part of the excitement with the FJ but, its big, its powerful, its vintage, and with this wheel-brake-suspension upgrade it is going to be a player!
i cant wait for spring!

[fjfool]

Many members use the 300mm Arashi wave rotors. They are plentiful on eBay and work very well.

http://www.ebay.com/itm/2-New-Front-Brake-Rotor-Disc-for-YAMAHA-TDM850-TRX850-FZ750-GENESIS-FJ1200-Gold-/141209740827?pt=Motorcycles_Parts_Accessories&fits=Model%3AFJ1200&hash=item20e0c1a61b&vxp=mtr#ht_3866wt_1161


They come in 2 colors, gold and black. Here is a photo of both colors on the two 1989's. Mine is the white one and it does have a '88 FZR750R front wheel.



Fred

[fjfool]

^nope, no chinese parts where they could cost me my life^
fairing screws and stickers sure, no way on brake parts
i feel the same way about those cheap pattern brake handles that cause front brake lockup, just not worth saving the $100

[Pat Conlon]

I would like to know more about that rotor failure...
Full floating rotors need to be clocked between right and left rotors.

Mine are genuine Galfers Wave rotors made in Spain.

[ribbert]

I would like to know more about that rotor failure...
Full floating rotors need to be clocked between right and left

Pat, what do you mean by ..."clocked between right and left" and what rotor failure are you referring to, I could find nothing in the thread on it. I'm only interested because it's an extremely rare occurrence.

Noel

[fjfool]

Pat, in all fairness, i have no background information on that photo
someone posted it in a thread about the Chinese knock-off levers

1) its a shocking image, sensational and frightening
2)on the other hand, why the plastic fairings are not destroyed from a resulting crash is suspect(how could that not cause a crash?)

still, i will not trust any Chinese steel or alloy in a load bearing application

please elaborate about the "clocking" the full floater 

[ribbert]

still, i will not trust any Chinese steel or alloy in a load bearing application

I mostly share your view and would not, for example, have Chinese master cylinders and many other things but I researched these rotors endlessly because I knew of so many people using them without issue.
The post below is an old one and my rotors by now have probably done as many kms as any on the forum, and they get used.

I was also a little suspicious of that rotor failure for reasons I couldn't quite put my finger on.

Chinese Junk
« on: April 15, 2013, 07:12:28 PM »
Reply with quoteReply with Quote
I like to research things before buying, something the net enables you to do infinitely.
I did this with my Chinese rotors. While there was much anecdotal evidence here, I looked around elsewhere as well.
Pretty much nothing but glowing reports from users everywhere I looked.
The only naysayers being those who had not actually used them prattling on about not trusting their lives to something as important as brakes with cheap Chinese rubbish and so on.
I came across a Hayabusa forum with a lot of members very happy with these rotors and found this post which might be of interest to anyone sitting on the fence and considering new discs.
I have a couple of thousand Km's on mine now and have subjected them to everything that is ever likely to be required of them and I am very happy with them.
I suspect with a third of the worlds manufactured goods now coming out of China we are trusting our lives daily to cheap Chinese products more than we realise. Many old and well respected brands have quietly moved their manufacturing there without fanfare.

A footnote for Aussies, forget about the yanks (or whoever) owning Vegemite, Hills Hoists are now made in China!!!!!!


My father works in a company that performs tests to weldings and metal fatigue in big structures (bridges, railways...) here in Portugal and Spain.
I ordered one of this Chinese rotors and gave it to him for him to test.
I posted the results on the Portuguese Hayabusa Forum
Forum Hayabusa Portugal :: Verificar tpico - Discos em flor opces e preos.

Ok, it is written in Portuguese but I'll can sum it up by saying that the "Arashi" rotor passed every single test. After heating, cooling, twisting, pressing and chemical abuse all came out fine.
One test that is particularly interesting is rotating the rotor in a machine that reads changes in a magnetic field crossed by the rotor thus enabling to "see" into the rotor to check the uniformity of the metal alloy.
By the way, the metal the rotor is made of it's called Martensitic Steel (AISI 420), just like the Galfers, Braking, EBC, etc. .
I've surfed the web and found everything: warped Arashi rotors, warped OEM rotors, warped Galfers, cracked Brembos, you name it. I guess these Arashi rotors are as good (or as bad...) as the others.

On a final note, I just wanted to say that you rarely get "what you pay for". Life does not work like that at all. Sure, the rule of thumb is that the more expensive something is, the better.
But for this type of simple, mass produced items, the final price little has to do with production costs. It has more to do with desire of ownership and pose value. It doesn't matter if a rotor- any brand -costs $1 do make if people are willing to pay $1000 for it.
I'm sure that if I erased the Galfer letters from a rotor set and engraved Chinese rotors with the Brembo logo and gave them to some one in this forum do drive-test them in his bike he would rave about the "Brembos" and trash the "Chinese".
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Noel

[FJ1100mjk]

I suspect with a third of the worlds manufactured goods now coming out of China we are trusting our lives daily to cheap Chinese products more than we realise.

Totally agree with this statement. I recently finished a stainless steel component design at work, and ordered a quantity of the item from a local fabricator. They were required to furnish a Certificate of Compliance of the material used. The material was sourced from China.