My son inlaw had 97 MXZx 440 & 99 MXZx 440 race sleds & although good twisty trail sleds for their time they are a sack of bricks to any rider forward sled. 440s are great engines but not for grades... woods only & can't keep up on grades. Mixing oil & gas another PIA & I had to carry oil for both of us. If you like them fine but a lot better handling & riding sleds out there. 440s struggle to keep up with 600s & 800s & why racers are 600s these days no future for outdated 440s.
I no longer have the 97 and my son still rides the 99. I have a Rev now. As for the oil, I carry an extra quart in a powermadd caddy attached to the chaincase on my Rev. On his 99, he has a caddy attached to the left side of the pan. Really the only extra thing we carry is a ratio rite bottle and that is in his rear storage compartment. Mixing oil is simple at the pumps, heck I've seen people take longer getting there gear on after filling up than mixing the oil.