front disc limits
 

Is there a minimum disc limit for a mot test.

what thickness do you think discs should be replaced

normally found marked on the disc and can relate to several things like original disc thickness, disk material and also how far across the pads can come in the callipers

The disc were originally 5mm they are now 3.25 and 3.50.mm
There is a slight lip to edge of disc which i could remove easily

are they ok or should i replace

As Skidlids has said - there will be a wear limit stamped on the inner edge of the disc - most Ducs I've seen on standard discs are 4 or 4.5mm min thickness depending on them being 4.5 or 5mm thick when new as a guide.

Just checked the manual - ST4S new thickness 5mm +/- 0.1mm - wear limit 4.5mm!
Fink you need some new ones......

One of my sets of discs has a wear limit of 3.6mm. As you are quite away below this with one disc I would look at replacing them. There are Pairs of New Wavey discs going on Ebay for £149. My mate with the Powervalve engine in the Mito has just ordered some so waiting for his feedback on them.

Don't run around with overly worn discs. This happened braking for turn 15 @ Sepang on a track-day. The cast iron disc broke up and tore the caliper off the fork leg. Luckily there is lots of run off there.

Mike

Many thanks to all who replied I now know what i need to do. scrap the discs and get some new ones

bleedy hell mikey,that looks bad

im looking at those wavey disks too, some feedback would be good, i have emailed a previous buyer and he s said they look good and weigh a bit lighter than standard disks but he hasnt fitted them yet as its for a winter project bike

any news on these disks yet ??????

my front disks are measuring just over 3mm now, 22000 miles so its about time they were replaced for a bling set i think, wish i could afford the galfers but cant so the ebay ones will have to do

just a FYI jump in from across the pond and new guy here....:D

I posted pics of those discs and recieved feedback that they appear to NOT be fully floating discs as advertized...when i contacted the retailers/auction people the response was that they did not know and only provide the information the manufacture gave them. Any input on if they appear to not be full floaters ?

I also questioned about weight and they had nothing to offer and said they did not know!

I also asked about the carrier and disc metals specifically...they did not know!

I also asked if the carriers where powder coated or anodized black.....I did get this answer. THEY ARE PAINTED.

Has anyone dug up some additional info. ? Like who is actually manufacturing these discs and where?

Share share :)

Eric Houston
Throttlehead
Speedzilla
C.O.R.E.
DesmOhio
DSC
etc..........

My mate Dougie at work has finally got his £149 wavey discs that are on Ebay, I haven't had a chance to chat to him yet or see the discs, I think Senna3 may have seen them when Dougie called into his work place earlier this week

throttlehead i have emailed them and they replied to my weight question with the answer that they do save weight and i have emailed someone who bought them, will see if i still have his email and post on here

kev can you post any info you have on them please

"they save weight" is not much of an answer from a seller of a product....

how much does one weigh exactly?
what is the carrier and disc alloy specifically?
Is it really fully floating or not?

and.... if "they" were willing to answer these questions or find out from the fabricators....many more may be purchased through word of mouth no less. However, half answers really do, and often should, lead to suspicion.

what if they are heavier, what if they are fabricated with cheap or poor metal alloys, what if they are not really fully floating, How thick is the disc, what type of paint was used on the carrier, what pads have been tested with these rotors and which seem to work best on street or track, ??

Well i'm doing a fairly good job of taking myself out of this potential purchase

Surely not trying to rub anyone wrong here is you are associated with these people....but information is important to a heady informed consumer :burn::o

here is my email from the guy i contacted:


Hello Dave,
Your the second person to ask me and I don't mind at all.
They seem to be very good quality, though I haven't fitted them yet(.They are actually for a guzzi project)The centres are alloy rather than steel and weigh 1kg less the pair than standard ones.The only minor disappointment is that on 3or 4 of the edges the hand finishing isn't as perfect as it could be.You probably could correct this yourself if you felt the need but once fitted I think you'll hardly notice.I think maybe if you ask he might refund if you are not happy.But honestly, especially for the money they seem very nice.
All the best
John

They are apparently made in China!

whoahhh throttle head

your talking me out of them now. i'm going to email them again and ask a few of those questions as im not willing to risk my life on some shady disks, i would rather pay double the money and get galfer/braking form my local dealer

cheers for your help so far

dave

heres my questions followed by his speedy reply

before i part with £150 could you answer a few questions on these disks for me please:

what metal is used to make these disks ?

how thick are the disks ?

what pads have they been tested with ??

are the centres of the disks powder coated ??


heres the reply:

no problem
high grade stainless steel outers centres are high grade aloy that is high temp painted doesnt chip. discs are 5mm thick tested with standard pads so no need to upgrade, read the feedback you will be glad you bought a pair

I don't pretend to be a metallurgist or a "glass half empty" bloke ;).....but i may be.

What high grade stainless steel ?

there are many types with differing behavioral/molecular characteristics and manufacturing processes that better align themselves to specifically tested applications.

What alloy specifically is being used for the carrier (again see above for important information)

further and important for me also, is to verify whether or not these are full floating buttoned rotors not semi floated. They are advertized as full...but could not verify other than deferring to the actual manufacturers statement for retail.

150pounds per disc plus +shipping to the USA makes them very close to Braking wave rotors or Galfer I would guess if you get a good internet deal.

while i would still want a pair if quality is there....i would rather have a light weight pair of full floating of standard shape than to get on the wave/petal bandwagon.

Just to note -there are many write ups confirming little performance benefit of the wave/petal design to majority mortal bike riders/track day enthusiasts. Weight would be the primary benefit but the other claims of cooling or cleaning etc....would not be of consequence to the majority.

Dang I want a set for the Duc 998 just to write up abount them now:lol:

but these are the yum yum

http://braketech.com/cgi-bin/search....late=stainless

its £150 a pair not a disk so its half the price of galfer which is the only reason im looking at them. im not expecting much more performance from them but as mine are on their last legs i need something that will stop me hitting the wall at speed. i want a set because they look damn sexy in my eyes

well as a pair it is certainly a bargain if they are at least as well performing as OEM, they are lighter, they hold up....and come with some kind of manufacturer warranty against defects :)

i like them as well for the price i'm just playing skeptic but further want to know the what i am actually buying :D

Pair of new EBC Pro lites on ebay for 150 buy it now
http://cgi.ebay.co.uk/Brake-disc-Duc...cmd ZViewItem
pedigree items - I think the Moto Rapido boys race with these - at least they recommended them to me a year or two ago

If i were in the market for a pair of new discs. id go for a named brand as most are tested and have proved to be up to the job. These fancy no named discs on ebay are a no no. im sure they sell plenty but not for me i want a well known brand. who can tell you the specifications not a fly by night ebay seller. at the end of the day it is your life you are putting in their hands how does you loved ones go about making a claim against a seller on ebay. think about it. and buy genuine or at least from a reputable company.

To be honest i though the idea was to have as much brake contact as possible between the pads and disc. with the wavy design there is not a lot of contact as so much of the disc is removed to save weight.

Yes i know there are superbikes ect racing with these but im sure they didnt come from ebay.

Thats a good point beek, but surely new disks are going to keep me alive and upright better than 3mm thick ones ????

does it make a difference if it has a brand name, they all come off a production line somewhere in the world at one stage in their life. if this guy on ebay is offering them at a good price and cutting out the middle men then its got to be worth a shot in my eyes

deej
you already tried to ask the questions to the seller and he didnt know most of them.

Yes im sure new discs of any make are better than the 3mm that you have but. often cheap discs are made cheap inferior metal and wear twice as quick.

id like to see them road tested against the original brembo fitments.

Its not that difficult to make these discs with the right kit eg laser cutters a friend of mine used to have a business making steel bits and bobs and laser cutting is actually quite cheap when you have a lot done at once.

it seems that someone has seen a market for these discs and now they are everywhere.

cheap nearly always mean cheap in every sense of the word

or perhaps the inverse.....that new fad / performance offered by one is expensive but made easily and cheap = they make big profits until competition arrives

if we can get real answers with known good materials you will save pretty well.

i have emailed a few other people who have purchased these disks and everyone has replied with good things to say about them,good quality look good, yes the seller may have been a bit vague to others but he answered my questions quickly and with as much knowledge as what my local dealer would have.

this guys not in it to make 100% profit as he probably doesnt have buisness overheads to compete with, they would probably be £250 in a shop and then people wouldnt think twice about buying them as they are in a shop, would they ???

when i can afford them i'll buy a set and give feedback then

deej

heres some more replies:

Hello Dave,
The centres are black(which suited me)but I'm not sure if it's powder coating or what.It does look durable though.I'm not sure of the material of the actual rotors.I'ts definitely not
cast iron.I'm sure he mentions what they are made of in his listings.Like I mentioned before there are slight imperfections in the finish but I don't think anything too drastic and definitely not noticeable on the bike.
I don't know who makes them but they are produced in China(what isn't)
The service was okay,though not the 48hr delivery he states.A day longer I think! However he does seem to get good feedback for his delivery as he does for the product.
I can't say I found him overly friendly on the phone but I think he was driving at the time.


hi Dave!,My first impression is positive,the finish is ok and they fit
well,i was not sure if i like this "new style" braking disc on a classic
bike like the 748,but they looked great,i have not tried them on the road
yet cause the weather is "****",if you want me to mail you some pictures i
can do it over the weekend,Regards:Jakob Tamburini Krygaard!



Hi, only to glad to say all was good! He immediatly supplied a contact number for me to pay by credit card, they arrived on time as described (48hrs) and were properly packaged! They look good, fitted perfectly. Haven't used them in anger but all is good so far!!! All in all, for £148 TOP buy, TOP ebayer!! Hope it helps, if you do buy, let him know I recommended him!!! I might get a discount next time!! Cheers Paul.


make your own mind up time i think

[Edited on 11-12-2005 by deej]

here is what i asked....and doubt will get any answers

many of us and in specific clubs are waiting for specific information that could be gained by you from the manufacturer.

-what is the rotor steel alloy specifically?
-what is the carrier alloy specificallly?
-what is the exact weight of the ducati rotor?
-Are the rotors truely -+full floating or -semi-float?
-what is the ducati rotor thickness?
-Has the Ducati application been tested the bike?
-Who is the manufacturer and where are they manufactured?

honest answers to these questions will bring many sales. let me know.
thanks

well here is the Ebay sellers response....the thickness stated is different than what is reported by somebody here in this thread as a note as well.

He didn't really answer much and he further emailed and stated they were manufactured "abroad".

of additional note......FYI he admits that the rotors are semi float and not full floating rotors as his auction suggests they are!

he generically states they have been tested on his bike but does not say what brand or model....when my question to be answered was about Ducati. the weight "is around" WELL weigh one. If they are quality metal they would not need to be 5.5 mm thick...if he is even correcct !

=====================================

"the discs have been tested on a bike of my own and at the factory, the weight is around 1.5kg the discs a semi floating and 5.5mm thick. the discs is high grade a stainless steel and the carrier is high grade alloy, all i can say is read the feed back they are great discs, buy one pair and believe me you will be back for more"

Do what you like with your own necks but remember you are risking it for £150 the difference.

He obviously hasn't got a clue what he's selling.
:puzzled:

exactly my point......but interested in finding out my questions still. Whoever takes the chance make sure to post some feedback on weight, thickness, etc......
thanks

Buyer: Hi I've got a Ducati, and need some new discs.

Seller: Wow, you must really love your bikes. Bet that was expensive.

Buyer: Yeah it was, I love it, its my pride and joy.

Seller: Bikes are pretty dangerous are'nt they?

Buyer: Well they can be but as long as you look after your brakes, have a good quality tested branded braking system and quality tyres, like the pros use, I mean money is not really an issue, we are talking life and death situation, anyway I notice you are selling some brake discs on Ebay.

Seller: Yeah, don't know nothing about them actually, ...but there yours for a super discount rate if you want a pair? The finish is questionble, but whats the worst that can happen?

Buyer: Yeah suppose your right, allthough all the rest of the kit on the bike is quality, but then Iam saving a full massive £100. I could just wait and save, maybe stay in a couple of weekends, but nah, these will do.

Ebay: Great, whats your card number. Oh by the way I also have some tyres as well if your interested? Not sure where there from either, unbranded, treads abit odd, but they look ok....

is it a case of these discs being cheep or named brands just being over priced.
you can pick up car discs for much less than general bike discs and they have to work allot harder with the weight and size issue.
I don't think they look to bad. if you want some get em if you don't, well keep your head up your arse. Big deal

Also playing devil's advocate, I wouldn't expect the grease monkey at my local bike shop to know the exact grade of steel used in the outers as much as the grade of alloy use in the centres either. This guy obviously sells brake discs and sells lots of them, and does he really need to know the composition? You should try phoning your local bike dealer, ask the same questions and see what response you get - they'll only read it out of the product brochure!

metals are keepet a trade secret, it stops otheres copying,:flame::burn::burn:

cheers antonye, that was my point much earlier on. think its worth a shot when i can afford them.

keefer, well said, think it is down to a brand/ non branded product arguement again.

further communication with the seller gave an admittance that the rotors are semi-floating units and not full floaters as advertized in the auctions :eureka: He has promised to revise his future auctions to be more accurate :burn:

hope this is adittional helpful info to the group here

whats the performance difference between full floating and semi floating disks???

As stated in another post ive stated dont skimp i did and would never do it again and this is from experience go for the EBC ones look on there site for where to get the good deals, this is a critical part

thanks

anyone got any more feedback on these disks yet, now xmas is out the way i may be able to afford a set

i have just received a email from a guy who saw i was bidding on some ducati disks on ebay and this is what he has said.

Hi Dave,
Thanks for your e mail and questions, and dont worry, you are not being a pain in asking the questions, as I did too, as I wouldnt risk my life either.I have used the discs over 7000 miles and 5 trackdays at Snetterton, which requires some seriously heavy braking, on my Aprilia RSV-R Factory. The discs are made by an ISO 9001 certified Engineering company, using the latest laser cutting technology to produce the discs, and they are an OE manufacturer to Honda, Suzuki and Yamaha, and supply MAINLY to the commuter market, and are therefore obviously in the Far East. We have researched the market for over a year to provide them with all the information necessary to enable them to manufacture the discs. The braking surface is manufactured from a high carbon stainless steel, designed to cope with temperatures in excess of 600'C. The carrier is manufactured from a high strength aluminium alloy. The discs are fully floating, are 5mm thick (an increase to 6mm results in a 25% weight increase with no performance gain), I PERSONALLY have tested them with Bendix, Brembo and EBC pads, and all are suitable. We offer a 12 month warranty against faulty or defective parts/workmanship. We are only just ready now to begin to roll out the launch, they are at MCN's photo studio next wednesday ready to appear in their 'New ProductsReview' section, so things are still being prepared. The carriers are anodised gold as std, as we felt that they look similar to the Brembo originals. I attach a picture of the 320FC, which is the type required for most Ducatis and Aprilias, but I will need your precise model in order to ensure that you get the correct discs. The first consignment is at sea at present, so we'd ask you to allow 28 days delivery....
I hope that answers all your questions Dave, but please feel free to get back to me with any other queries. The RRP is £275 per pair including VAT, + postage. I look forward to hearing from you.
David

i am currently trying to negoiate a dsc discount with him, please let me know if your interested,thoughts on the product or if im wasting my time

i do have a photo of the discs separately but cant upload it onto here for some reason

cheers

deej

[Edited on 9-1-2006 by deej]

[Edited on 9-1-2006 by deej]