I'm looking to build up a 350x that needs the motor gone thru anyway, not currently running The bike will only be ridden a few times annually but one of the rides will be at the 3 Wheel national MX race in Florida. Trying to decide if I go the Hi-comp route with cam (possibly head work) or if I go a little simpler with a Big Bore (414cc?) and a cam but pretty much leave the head alone? I do already have a 400ex carb for it. I'm trying not to totally break the bank as I have an 86 200x and possibly a 250sx to build for that race also..... Thanks in advance for any help or insight.