a friend of mine has a 02 grizz 660 with 300 miles on it. twice he has had a axel or outdrive break. once in the rear and once in the front. he has 26" titan 589's on it and he has taken it to two different dealers and both said it was because of the larger tires. one dealer said it was covered by warrenty and the other said it wasnt. whats the deal? are the tires causeing it or what? has anyone else had this problem?

 

The tire are probably the main cause but there can bee other reasons as well. If the quad is jumped and you stay on the gas when you land that will break them as well if you are in a mud hole or a situation when you you have alot of wheel speed and then catch traction suddenly that will break them as well.