I have a 2004 600 ho rev which idles poorly, starts hard and stalls when put into reverse. I did a compression test today and have 105 on the clutch side and 120 on the other. I have heard talk about the 03-04 rings being bad from the factory and wondering which rebuild kit is the best to use. The sled has 2500 miles on it. Also, is there anything else I should do while it is apart?? Any info is greatly appreciated! Thanks.