I was wondering if a stock yamaha big bear will fit 25x12x12s on the back and 25x10x12s on the front? Will I need a lift or wheel spacers. I am also wondering if it will be much harder on my atv running wider tires. I want to run super swampers vampires on it but don not want to put a lift on it till the warrenty is up. Also how long should I run the stock tires to make sure the atv is well broken in? Thanks for the help