not sure about the drivetrain, if you look at a sport tour motorcycle, lets say a kawi concourse it is putting down 150hp and using a small driveshaft. I do admit after shopping around and looking at ATV's the drive train isnt as stout as my truck, but how much torque is that 1000 making when in high range?

My theory is because of legal reasons....anyone can get on a ATV and drive beyond their skill set. This happens often yet it seems rare that you read about 12 year old riding a sled out of control.

 

that's a good point-

I was thinking more like... having a 26"+ tire suddenly grab and shock the drive train- the enormous power built up would destroy a roller cage, cv or diff pretty quickly-

 

Hey anything can break under the right load. I used to run 38" swampers on a dana 70 in my jeep...up a rock face 2lo and bang i did what people thought to be impossible....bleed out the diff case after shearing the ring gear.