I would have to say yes. I have an 02 WR426F and I messed around with the stock suspension all of last year and never could get the bike to have proper static sag and race sag (I am 6'2" and weigh about 225 without gear). Also the bike always felt heavy in turns and would always push. So this year I sent my suspension off to Enzo (even though I was skeptical at spending $625 for suspension tuning) and had new springs and a re-valve done. Well I am a skeptic no longer . All I can say is it rides like a different bike. I am way faster everywhere and it just handles unbelievably well. It is no longer a exhausting to ride even at speeds I could only dream of before. I have a perma grin now whenever I ride it because it is so much more fun and it instills so much more confidence. When I buy a new bike the first thing I am going to do is spend some of my bling money on a suspension respring and re-valve. It just makes an awesome difference.