Nobody with a small engine has a problem with racing when there bike is out there. My personal best racer is Wolf, even when his bike wasn't running good he would still race no matter what.
At one time Dobie use to have a regular modified 5hp briggs. He use to race it all the time. Then he went to a briggs world formula, and he also use to race it all the time. Then he had a modified 13hp briggs built. It would race about twice a year. Now with Doom he races it once every 3 years.
I remember racing my blue bike in the Alley years ago maybe 10 times in 1 day 4 years ago. Then went faster on alky, still racing 10+ times a day. Now-a-days you would be lucky for the guys to even bring there bikes to the racing spot.
I personally don't care what motor you have, what you weigh, or what fuel you run. As long as your actually racing, but I'm done with these idiots. I never wanted to be the fastest, as long as I'm fast. I don't want to build a motor so big and powerful that I don't like riding it after spending $4000+ on it. And if I did ride/race it, I still need many other people willing to race me. But I would just be testing and tuning like everyone else does. And I just can't see the fun in that.