I don't know what the laws in Quebec are, but in the US it is illegal to ride bikes or atvs on snowmobile trails in the winter. Maybe its different up north.... If you do ride in the cold weather, try going up 1 size on the main and lower the needle clip 1 position (thereby raising the needle). Be sure to let your bike warm up longer than u would on warm days. If it cuts out or bogs, u haven't got the right jets in it. Just keep playing around with it and good luck.