He clearly stated that he wasnt sure what the YFZ 450, was or is.
Both of your jerkoffs should ease up alittle and provide some useful info, if not than just keep it moving.
I have a 08 yfz450, they are fun bikes for sure. I like my yfz more and more everytime i ride it.
But if your boy has a yfz, and he doesnt have huge, extensive work done and you are a good rider, you should whoop that bike in a drag race with the mods on your bike
Just practice launching and get some videos to show the rest of us.