Hey Shane, the 465 frame is exactly the same as the 250 apart from the numbers. You will also be able to use a "K" frame with minmal fiddling in the linkage area and airbox mount tabs. Try canberra motor cycle wreckers (they are a Yamaha dealer so may be listed under that, they are in Fyshwick) I picked up a 465YZ frame for a mate from there not too long ago