I would like to see a bit more funding put forward to update two strokes.
Perhaps
THIS might be the way forward but I think re-boring might be a bit of a task
Rotax has built a clean running snowmobile but somebody in power must have been bitten by a two stroke when they were young

cos they seem to hate em with a vengance and wont allow two strokes in the parks at all, even if they do run cleaner than fours
Although I live in England and have no chance of using a snowmobile I recognise the fact that this technology needs some backing and good will in order to reach it's potential
Rotax info
HERE