Well I finally worked some of the bugs out and have taken it for a couple rides. I still have a bit of carb tuning to do but I must say I'm ecstatic of how well it turned out.
Between porting the intake passage to the carb open size, re-jetting the carb, aftermarket CDI, larger 450x exhaust, 13T/53T gearing the thing is a torque monster! Both my buddies ride true 450cc bikes and so far I've been able to power my way out of any mud hole and situation they can't!
Only down side, I'm only 5'7" and a 450 frame / suspension is a bit tall for us short people.
Takes some getting used to with balance when stopped.
Unfortunately we are seeing the last of the 30 deg Celsius weather as fall is upon use here in Canada. :( If we are lucky we might be able to ride into October before rain and eventually snow hits. Then it's a full 7~8 months before spring riding...maybe.