You could source some chains or stud your tires. Thats what I would do... likely both LOL.

Also some bolt on wheel wieghts.

You can always make your own with a small pail that will fit the ID of your rim, fill it with cement and a couple of properly placed bolts to fasten it to the rim. I made my own for my riding tractor, they have lasted me several winters now and weigh more then the ones I was able to readily buy.

My uncle has also filled his tires with an antifreeze soloution for wieght and traction.

edit:
I would be careful loading your suspension too much, the weight is better used actually in or on the wheels. If you load your suspension too much you run a higher risk of drive damage IMO.

 

I plowed my house (275' driveway) and my shop (About 1 acre - 1/3 concrete and the rest is stones) all last winter (up to about 7") of snow using my Sport 400 and a Cycle country 48" blade. It has PLENTY of torque to push the snow - and it does NOT have a low gear. I also did not use chains. I simply scooted back on the seat as far back as I could. I angled the blade and made long runs with about 1/8 - 1/4 of the blade free.

Don't let anone tell you that a 2 stroke can't plow. I also had a 1996 Xplorer 300 (Same as yours, but 4wd). I had a very similar 48" Cycle Country plow on that and there wasn't any snow here in Ohio that would stop it. I plowed my old driveway, the street and 3 other neighbor's driveways with that one.

The only time that I have had issues with traction is when we would get a layer of ice before the accumulation of snow. In that case, get a little bit of a running start (Not fast enough to bend anything, though). I'm sure with your chains, things will work out. If you need to, add some weight like the others said.

 

What part of Canada you live in might mean alot...........If your in the Snow-belt like me (Muskoka,Ontario) then you may have a tough time plowing depending on the winter we get...........Have fun!!..Caper................

 

I studded all my tires with sheet metal screws and I hardly spin a tire now. Mind you I have snow and summer tires, I don't know if I would stud your everyday tires. But as Caper says, too much snow you'll have problems. I'm not saying it can't be done with a 2wd bike but you'll just take longer than a 4wd. Have fun!!!!