front brake discs..quick advise..please?
 

Went to get the 996bip MOT today (Finns redhill) and it failed on a warped front disc. Still not sure which one?

Tester said didn’t I notice it pulsing through the brake lever? To be truthful..No not really but as I am due my Tax I wasn’t go large on the way to the MOT garage plus I pass a plod traffic division garage on the way :-)

Pro twins have quoted £187 for the "flower pattern" (not in stock) replacement brembo disc or if I go for the "straight spoke" brembos they are £150, but will need the pair

Still need to know which of the buggers is warped!

So very quick... what ya think

1. Always replace both disc rather than having one part worn and the other new

2. Replace only the faulty one

3. Buy some wave pattern (gaffer?) discs instead, for the front...Any suggestions which ones work best?

4. Anyone got a front disc or discs for sale that isn’t knackered?

b0ll0cks looking forward to riding her this week :-(

Cheers for all your help

J

P.S. Finns wont pass MOT if it doesnt have standard cans on it..Unless it is a SPS that came with the termis on them. just so you know.

I have added some comments.

Good luck,

RX

just missed these;
http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEDW%3AIT&rd=1

Tim,

If you were a girl...there's a name for that kind of behaviour...:sing:

RX

I agree with Ricky, never replace a single disk as you'll end up with a mismatched pair. Replace both disks at once.

The ones in the link Tim gives above are the "flower pattern" ones, which are the latest and lightest centres. You could go with the straight spoke ones as there's not that much difference between the two weight wise, but obviously lighter = better.

Brembo are fitted to Ducatis because they are the best - just look at any MotoGP bike to see what they use. Admittedly you're not buying the same kit as Valentino Rossi has on his Yamaha, but the knowledge they have amounts to a lot. While it's perfectly acceptable to replace the oem no-make disks from the latest YZXRRGSPVFF with some pretty Galfer petal disks, they may still not perform as well as good ol' Brembo.

That's my thoughts, but it's your wallet and your choice :D

One of your discs may well be warped. If you can put the bike on a front paddock stand you should be able to tell by holding something like a small wooden stick (a chopstick would be fine - don't use a screwdriver and gouge your disc) up against the fork stanchion at right angles to the disc. If you butt the stick up to the disc in question, and then leave a very small gap, it should be quite clear if the disc is warped 'cos the gap will either increase and decrease as you turn the wheel, or all the clearance will be used up. That'll mean that the disc is warped or it's not sitting on the carrier right.

One thing to check though is that all your semi-floating buttons are actually semi-floating. I had a big amount of pulsing on my bike and it turn out to be crud behind one of the buttons that had stopped the disc doing any type of self centreing. Out with the WD40 and an old tooth brush and scrub them up - worth a try and could save you big bucks. Take your calipers off first though so you don't get any WD near your pads, try not to get any WD on the discs swept surface and make sure that you degrease the discs thoroughly as a precaution. Worked for me.

Surely it will say on your fail form which disc is warped?

but yeah, change a pair. Have you tried GPR direct at silverstone for discs? they are a brembo dealer............

thanks for all the feed back...

spoke to bret at pro twins and the previous quote for the discs from them was incorrect. for full floating brembos it is £329 plus vat

I saw at brakesu.co.uk is selling EBC contour full floating front discs (Contour Front Disc Wavy NEW STAINLESS ROTORS)

and all the pads (including rear that i need to get anway) for £289.31 including delivery

sounds good to the wallett but i have to agree with Antonye and buy the direct replacement, rather than saving money and finding the EBC's are just naff

Unless anyone else can put some light on the EBC's?

Handy tip on checking the discs and the buttons..something to do later.

The MOT station said they would be able to tell me which disc had warped if i didnt have braided lines as they would pinch one side off. I suppose they where busy?

looks like it will be protwins and the money i was saving for the 12k service has pretty much gone :-(

J

sound like a bunch of Muppets