I wanted a 390 , but bought a FE 450 ( better deal ) . The 450 is to much for me, so I put a G2 throttle cam , 13/50 gearing ( smoothed out power) , ans mapping on soft setting . I also added a Rekulse clutch . My bike is VERY smooth . My buddy rode it stock with above settings , and he said his 2009 KTM400 had more power than my 450 !! he had a FMF full system on his . So try to detune youe 450 before you sell it . The FEs are very east to tune up or down on power :cheers: