Front Rotors warped?

[timmyrocks]

yer get a ruler, (verniers if you have them) and give them a quick measure. wierd how it wasnt doing it before. also colud be a stuck piston.
cheers

[IsleofNinja]

Are you definately positive that it's the disc rotor that causes the vibration???

If it is I would replace it, I would hate to be traveling at a good speed and have the handle bars vibrate on me.

Vibration could be caused be unbalanced wheel or buckled rim that I have experinced going down the striaght of eastern creek or even steering head nut

>> +1 and yeah steering head bearing slop is pretty common on 9's by now. Haynes manuals are not a bad investment and can be brought online.

>> If your brave enough and you've checked that other than warped rotors everything else is mechanically fine ,, TRACK DAY!!

In General , quality rotors warp for two reasons - 1 Excessive heat build up followed by uneven cooling ie 240km to 0km .... waiting ....... warping ....
2 - accident damage / rough handling when the wheel is off (Rare)

Sometimes , providing you have checked the pads / pistons etc , a track day or similar [making sure you are well clear of other riders] can help out.
What you need to do is get some serious temp into those rotors WITHOUT coming to a complete stop and sitting there!!
Ie repeated high speed braking but to get the brake rotor temp up but even cooling via continued motion. Followed by an easy lap or two to cool them evenly.
Most times they will pull straight if you do it right , worth a go mate