Unknown engine in Yamaha phaser

I’ve been riding sleds since I was a little kid I’m now 19. I have a 2007 M8 arctic cat a 99 700 rmk and a 03 Summit 800 but out of all of my sleds my old 86 Phazer is by far my favorite. They’re nimble quick easy to get on one ski. I have a buddy that’s never ridden before and he really wants to get into sledding. I told him to get a phazer I got mine for 200 bucks and I’ve had it for 8 years no problems well except for the stater but that was an easy fix. My friend is a really tiny guy if...

Unknown engine in Yamaha phaser