throw some chains on it and he'l get some traction my 250 moto4 yamaha whears chains year round and likes it way more traction and fairly cheap

 

The smallest I know is a yhamaw 1999 Timberwolf 250 bUT u have to put warm water on the front shafts if it is cold

 

this is a 7 year old post

 

Funny thing is, I don't think the answer has changed much. 400cc is about the smallest displacement for a 4x4 quad now. CF Moto makes a 400cc 4x4 utility which is probably the least expensive 4x4 quad you can buy. The Arctic Cat Alterra 450 4x4 might be the smallest in dimensions though and is pretty close to the same price. I actually like the idea of a 400-450cc class 4x4 that is physically smaller than the bigger utility quads. A smaller machine that is more nimble, lighter, and fits easily in shortbed pickup truck bed or even in a smaller truck bed like a Toyota Tacoma or Chevy Colorado. The Alterra 450 is plenty peppy enough and gets up to a decent top speed of around close to 55 mph I believe. I've seen a review of the CF Moto 400 on Dirt Trax TV and they commented on how sluggish it was. I think its more to do with the cvt clutching than the engine though. CF Moto has a 500 that doesn't cost a lot more though. I'd rather have the Alterra 450 anyway. I'm still not sold on CF Moto reliability but I think they do include a free extended warranty on most models.

 

In the big makers lineups, in ccs now, 350 Grizzly, smallest ever, 250 Suzukis? I think they had diff lock as well. The 300 Hondas and KLF300 Kawasakis had small frames but I recon that now, the 350 Grizzly will take that prize as well.