I'm a newbie Heard about a 500 big bore?

Hey, I have a 97 Warrior :
12/1 piston
hot cam
spring kit from Alba
Edelbrock performer carb (best money ever spent!)
Supertrapp
I estimate 25 +/- horse on motor with 110 Sunoco
Nitrous express wet kit-20 shot most so far (worst money spent!)
Would love to sell the nitrous to save for stroker/ big bore
Would love to find someone to port it
Dire need of suspension cuz it's gettin' pretty fast
Biggest drawback- hooking the torque to the ground
Love poppin it up on the asphalt, what a rush!
I saw on another site that pointed me to this site something about a 500 big bore!!!?
Gotta hear about that

The biggest you can get now is the 460 from Cycle Works Racing. Four Stroke Tech used to make a 500 kit, but they stopped making it a while ago. It required considerably more parts and money to build compared to the 446 kits they also sell, and for only a few horsepower more.