Honestly I dont think there will ever be a point in time where a quad motor is faster than a sled motor...it just wouldnt be right, that and the quad would have to do 100+

 

Actually I have rode next to a polaris ATV that was right there with the sleds . Because it had a RMK 800 engine and CVT set up with Boondocker Nitrous
KInda gives you perspective when you think you machine is pretty fast and a machine with over 190 hp come by you . Make you check to see if you front brakes might have just locked

 

Any 500cc sled that I've ever owned would do 100 mph.

Sounds strange.