Was up in Houghton this weekend but came home early cause buddys 03 MXZ 600 HO blew a cylinder. Has 139 on other. Limped it back town and took it to Skidoo dealer there where they comp checked it. 2 mechs and the service guy all asked if we did the pre season carb cleaning? He did not and was told thats prolly the reason why it happened. Talked with another guy at a restaraunt later and he also asked if we cleaned carbs and used fresh gas. I just bought a 05 MXZ 600 HO and Im freakin now cause I havent cleaned carbs as I just bought it and it runs good. Any advice on this is appreciated and also can a guy do this himself on the MXZ?? Im guessin you pull off the float bowls and clean em and maybe pull the slide out and check? Add fuel sys cleaner to gas tank??