Do you mean 22mm offset? I thought 27mm was for the 250Fs and 22 or 24mm offset was for the 450s.
By the way, Motocross Action mentions getting taller bars, but nothing about offest triple clamps in their review of the 2006 YZ450F.
this is what was installed on my 06' YZ450F...
APPLIED FACTORY RUBBER 27mm BLU
BE17E5510KBL APPLIED RACING
06' YZ/F 125 & UP