250 wet on a 4 stroke should equal around 232 dry weight, not all that bad.
Seems riding in Italy, you might go for a ISDT type bike, instead of a superbike motocrosser.
So Cal. Does IndianDunes still exist? I think they closed Saddleback. I rode the CarlsbadGP course on a Sat of one of the big TransAms. Track was groomed though, so really different than what they raced on.
Surprised you don't like sand. Big jumps and endless feetup full powered broadslides.