Hi Everyone,

Would like to ask for some help regarding my front brake disc.
I know that its supposed to be a floater, but should it float this much?


https://www.youtube.com/watch?v=2uj0dkECLWQ

If this is bad, any solutions to it? Tighter pins? Or spring washers?

Thanks in advance.

Mate, your bobins are fuked! I wouldnt even think of riding that until you get another set of discs or at least get a new bobin kit.all the best!

Those are not OE NC30 discs (which you would call semi floating as they are mounted on bobbins but rivetted pretty tight with sandwiched spring washers so you cant really feel any movement) - I would suggest those are possibly Stealth discs (?) and yes, that is far too much play. Can`t see from your vid but the bobbins should have a `wave` type spring washer and a circlip on the inside. If the washers are flattened or missing you can tweak or replace them to reduce the lateral play which will improve matters, if the alloy disc carrier is significantly worn they are scrap.

How much rotary play have you got (i.e. if you hold the wheel still and try to turn the disc)?

Rick

What Rick said. Those are full floating rotors. However, the bobbins shouldn't twist like that. I have the Corse Dynamics floating kit on my NC30 and 1098s, and while they move a fair bit, they aren't as loose as yours. I would check the back side of those buttons and see if there is a washer and circlip. Both rotors should be the same. It almost looks like someone put all the washers on one rotor and none on the other.

Here are mine:
https://www.youtube.com/watch?v=p7GtWkn-3SI
https://www.youtube.com/watch?v=q24ahCM6Yxk

Wow, thanks for all the quick and informative replies guys, its awesome to have finally found a great NC30 community!
As to the problem:
After taking a closer look, I've found that some bobbins still have the spring washers in them, and some don't.
The other disc has all the spring washers, and almost no movement whatsoever.
Otherwise, the discs and the carriers are fine, the previous owner has changed them, they're relatively new.
As to the spring washers, I have no clue how have I managed to loose them, but I guess they are not of the best quality.
The plan is to take the bike to a bike mechanic, have him take apart all the bobbins, and replace ALL the spring washers with the ones that are the same size, and then put everything back together.
I just hope that it won't cause "vibrations" in the steering while breaking..

Of course any additional suggestions and\or tips are welcome!

Thanks!

You may find this link of some use !;
http://www.blackshadow-uk.co.uk/Discregrind.html

willandrip wrote:You may find this link of some use !;
http://www.blackshadow-uk.co.uk/Discregrind.html

My Corse Dynamics bobbins are the same as the D.I.Y. ones on that site. I have straight washers in mine instead of the spring washers.