I have a 2007 YZF450. I had the suspension done for my weight. I am 155lbs and 47 years old, and just started riding again last year. (It has been over 20 years.) I am still trying to get the bike dialed in. I raced 2 weeks ago in the Vet 40 SX class. First moto I layed it down in a turn on the 4th lap. Second moto I killed it on the start, I was trying to start in 3rd gear but I think it was in 4th. I was wondering if it would help to put the DRD lowering kit on the bike. With the 450 you have to get a new head pipe. I do not want to spend the money if it doesn't help that much. Because I am so light I need to do everything I can to get the bike more Light and balanced feeling. Any input for a old guy starting back up would be great. Also I figured out that I need to work on my breathing while racing. I was so tired after every moto I could hardly get off the bike.