Green 2006 outlander 400 XT, yellow 06 outlander 400 max XT
My 06 400 a couple rides ago developed an occasional backfire. Doing a little research I found that a cracked exhaust pipe at the head could cause it. So I pulled it off and see it cracked at the collar. So I ground the crack and welded it. I did grind the welds down before putting it together. I took it for a ride and couldn’t get to backfire so hopefully it was the problem.