My friend says his '06 Honda CRF80 can beat my Blaster, what do you guys think?

You will destroy him. And boring your fourwheeler for power won't do anything if thats what you are boring it for. But if your boring it to fix it then, duh, its gonna be faster. And the hot rods crankshaft will also not do anything unless its a stroker. Either way you will kick the sh*t out of that 4poke.