Just joined today as I have been reading these forums a lot which have a lot of good usefull information that can be obtained from you all. Just bought me this summer another new 2016 Griz (4th one). Have had Honda’s & a couple of Polaris’s. Learned to ride two wheelers as a kid called (tote goats). Google that and that will tell you how far back I go!!! Anyway, just did an air filter mod that was done by a Kodiac owner, (info obtained from off this forum site!) using a NAPA filter part number 6449 & some 1 1/2" pvc pipe, but I used a 1.25 inch couple (from ACE Hardware) that was about .20 inch thicker. Was getting fine dust showing up on the sides of the inlet tube to the carb, that was getting by the stock air filter or through it??? Glad some of you guys talked about this same problem. Hope my mod works.