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