After being a Polaris faithful for the last 20 years, I have bought a new Warrior. After working on Polaris sleds for many years, the Yamaha is a little different. From all the posts I have read, it seems the ECP Air filters is the Hot Ticket, along with the silver Holztman CV Carburetor springs. I don't want to sound stupid, but just where are these springs located? Are they the springs under the top of the carburetor, when you take off the top Black piece? Thanks for the anwser. Put 62 miles on my Warrior 2 weeks ago on Tug Hill. So far I really like the Warrior. I guess time will tell. Only hope I can get the back suspension to ride as good as my Polaris edge did.