Tier 4 emissions is coming in June or July for the 700 and 800 series machines. New computer controlled engine, DOC and DPF. No exhaust fluid yet. I can't and am not saying this is a bad thing, its just a lot of new stuff and I'm sure will bump the price north. Who wants the the first ones? Anything under 75 hp is not effected yet. I have a feeling this thing is going to be very picky about fuel. 90% plus of all running problems now are simple fuel problems. Just a heads up.