it could very will be a 240. the only way to tell would be to take the head off and look. with that being said crf250s pick up pretty quick. but i dont get why we always have these threads posted "can i beat this" why dot you go try then you can find out for yourself. then you have all the bragging rights you can think of.
the only reason i can think of people asking "can i beat this" is because they have a buddy or someone that want to race them and they dont want to lose, so they ask around first to see if it has been done so they dont get made fun of when they lose. if you want a fair race rade another machine that is the same as yours. Thats why they made all sorts of different classes to race in. There are reason blasters are not in the same class at Raptor 700s and why Indy Cars dont race NASCARs
Race him and find out. When you lose figure out what you need to do to beat it, and if you win, race something bigger and see if you can beat that. if not, build your quad to eat it.
I dont know how many time people have to say this. You can only do so much to Blasters, but when you do it right they are contenders with alot of different ATVs on the market today.
NOTE: you can get an aftermarket extended swing arm for under $250.00. I think blasterboy made his.