They sound good. Road with a Yamaha dealer quit a bit and his and his sons were both over 300 hp. His wife’s around 250hp. Just too much weight. We did nothing but mountain riding in MT. and when they got stuck... it would take all of us to get em out.
About 540. Definitely a heavy sled but really reliable and fast, not my choice for ditch banging but if you are planning on putting on some crazy miles far from base camp it's definitely the sled I would choose.