oil in air box

My dad has a 2020 yamaha sidewinder ltx se and at the end of last season it dumped a significant amount of oil into the air box through the large tube behind air filter . I took it to the dealership and they said it was probably a plug vent line as they couldn't find any problems. I just had it...

Hey all! I just bought my 2nd Yamaha 1st one is a 09 Nytro that I got for my 16 yr old and he loves it. Myself I’ve always been a Arctic cat guy. Anyways I just bought a 2020 Sidewinder LTX Se. Took it for a rip on the lake and parked it. The next day I moved sled and there was a pile of oil...