I’m going to put around with the Engine that’s in it for now. Feel it out and make sure it all works good. I purchased the snow kit used & it’s custom to fit this bike. Assuming it works well, I want to put a YZ250 in it eventually.

yz 250 is be thirsty with a track, they say it takes a fair amount of power to ride them and you are wide open a lot

Yes I have read that also. A 450 is probably the way to go. We'll see when the time comes.