I recently purchased a 2011 Ranger 400 and currently have 31 hours on the machine. I use it mainly for deer hunting, but it is too much fun not to joy ride when possible. I was at first concerned about the starter gear not disengaging immediately after releasing the key, but that has gotten better. It seems to run better and start better after I have opportunity to run at higher rpm's for several minutes before parking, however, most of my driving during deer season is slow and easy. I have not seen much talk about the 400 and would very much like to hear from other owners about any concerns or problems they have encountered.