Having a bit of experience with newer fuelie 2 stroke sleds, I'd be shocked if the electronics don't fatten the fuel flow during break in, usually a timed event.
Cut for a about 8 hours yesterday not allot of pictures but here is a trailer load about half empty cut till dark, son and I had a great day. The 362 has a muff mod the 661 has about a gallon of gas through it. It really woke up and is a beast !!
I got just under an hour on mine yesterday. I'm on the 3rd tank. I thought there was an rpm increase on the second tank....according to my tach/hour meter. Just seems to run better than the first tank. I hope it goes even more as I get more tanks on it. I thought it ran pretty good. I didn't bring my ported 660 to compare it. I need to get some pics up and sell that one.