I believe Poo calls there 4-stroke an S4

My son is on his own for his next dirt bike or sled upgrade. We have set him up with his base - but moving forward he's on for the upgraded units. We'll help where we can, but he understands how lucky he is to have what he has now   

I’ve never used ski wheels before and don’t think I ever will.    I think my son has his eyes on a 600 ace Neo. But he does drive my viper periodically, so maybe straight to a 900 ace renegade might be the ticket for him. I won’t be buying it, the kids gotta work for their sleds if they want one, so I guess it all depends on how much they want to spend.    I have no problem buying them a pass, Val tag, putting insurance on the bravo and paying for fuel for them for now though. It was actually their Christmas gift for this season. I would rather see them spend time outdoors than on useless crap they’ll end up tossing eventually anyways. 

900 ace would be a tank for kids to throw around.   get a light 2 stroke and teach them how to manage their speeds.

No, it is not.    Ski