Been overhauling my front calipers as sticking. Have noticed that the NSF calliper has a notch in it where the rotor has been grinding on it. Anyone know what is causing this? Rotor doesn't appear warped although it has got red hot due to binding pistons ( hence the overhaul) . The rotor seems tight in its mountings and isn't floating, could it be off centre?
Thanks in advance.

I had the exact same problem, the forks were slightly twisted in the yokes causing the front end to sit out of alignment. Re-align the front end and it should be fine

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2011 XT660Z T�n�r� - Adventure Spec Bash Plate, OTR Enduro mud guard, Barkbusters with Storm guards, Renthal bars, Oxford Adventure hot grips, Metal Mule panniers, Metal Mule Top Box, Rotopax Water/Fuel cans, Metal Radiator Guard, Puig Screen, TKC80's, Fuel Mod, De-Cat exhaust, Chopped tail tidy

2003 YZR-R1 5PW (In Build) - Ex Virgin Racing Pete Beal built engine (fully rebuilt), Full Akrapovic Titanium System, Harris Rearsets, Custom Paint, Tall Screen, Power Commander

is the disc floating on its bobbins?ie floating properly?..how i check is to fit a n bolt through the hole,tighten the nut enough to grip it and turn the bolt head..i also use a lubricant and wash the discs etc with brake cleaner..tbh i have done this is situ and used an electric hand drill/screwdriver..loadsa lube and a slowish speed..

I had this and it was a warped disc.

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Bike: 2013 XT660Z, TKC70 tyres

Mods:
Barkbusters, Scottoiler, DIY Tail Mod, DNA Stage 3, Power Commander V & O2 Eliminator, Exan X-Black Stainless exhaust, Tool tube, Ohlins linear front fork springs, Nitron rear shock, JT front and Supersprox rear sprockets, D.I.D. VX 520 chain, Adventure Spec bashplate, DIY USB Outlet, DIY chain guide, Kev's Throttle mod

http://www.facebook.com/onemooseonemotorbike

Same here. Changed the discs and it was a massive improvement.

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Bike: 2008 XT660Z Tenere with various bits and bobs added or subtracted