Can 2009 yfz 450r shocks fit on a 2001 yfz 350 banshee?

No, 2009 YFZ 450R shocks cannot directly fit on a 2001 YFZ 350 Banshee due to differences in mounting points, geometry, and suspension design. The YFZ 450R is an entirely different model with a different frame and suspension setup compared to the Banshee. Modifications would be necessary for any kind of fitment, but it is generally not recommended due to compatibility issues.