I don't think you should have got smoked, I have a stock 660 and against my buddy's stock yfz he will win, but usually by not more than a couple lengths. Although, since that last race he has put in a Trinity full system, intake, and stage 2 hotcams, now I get my ass handed to me. When it comes down to it, it usually all has to do with the rider, not to bash your riding abilities or anything, but that shouldn't be a blowout, try switching machines with him and see who wins.
Well then I guess the only other question I have is, what do you consider getting smoked? How many lengths does the YFZ have on you by the end of your race. I call getting smoked a KFX400 trying to race my raptor(about 10 lengths).
i have a completly stock 05 660 and the only stock 450 i am having problems beating is my best friends ltr 450. i can jump him off the line but when we get in 4th gear he starts pulling on me. as soon as i sell my dirt bike i plan on buying a ct racing exhaust,rejet, loose the air box lid and try freez clear tube method . then i think i will smoke the 450