Tim,
I know exactly what you mean. When that race came on last night at the bar I happened to be with two of my old riding buddies. We all agreed AND signed a letter that we would get bikes and race again this year. I would have to drop about 50lbs minimum, but it would be a great motivation.
We all agreed that we would tone it down and just enjoy the races more than go balls out like before. My wife is cool with it and my oldest(4) is geeked at the idea.
You can get a great bike for $2k or less these days (early 2000's two stroke 250).
Leaning out over the gate as the revs come up on 40 bikes........oh man that's livin'