Ok, I just checked out RB Designs head and carb mod.http://rb-designs.com/
That's cheap performance! If I can skate for under $250, I may just do it. I like this bike a lot. It's comfortable, peppy, and is built in typical crude-but-durable Kawasaki fashion. It's a tractor, and completely utilitarian. I understand it. Sorry, you KTM guys, I'll stick with Big Green. I know you'll kick my butt in the sprints with your larger horsepower and refined suspension.
I used to drive a series II Land Rover, slowly. When I bought her, she was a bit tender. The guys with the hopped up rigs would blaze by me on the trails. Eventually, I'd pass them in a litter of transmission parts and a pool of oil. They had all the trick stuff, but I got often home earlier than they did.