Apparently, there are some owners having smoking and oil consumption issues with their 16's. Apparently they had a bad batch of valve guides. The engines are all made by Subaru for Yamaha. I hear that Yamaha is aware of the issue and has been paying for the repairs when owners are taking them to task. I am told that they are aware of issues with the air filters and boxes on the grizzleys/kodiaks and are working to redesign them. I am thinking a good way to test for bad quides would be a leak down test. Yes? No?