2007 RMK has strange noise

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My son's RMK has a strange noise just going down the trail. It sounds like a bearing is going out somewhere. I pulled the left side brg. cap off the drive shaft and that bearing is good. What bearings tend to go out at 2K miles? The chain case is full of oil and no leaks anywhere.

Thanks

 

[BB454]

noise

That's the one that usually fails. Check the one behind the driven too. I would look at all of the ones in the boggie wheels. Pretty nasty enviornment and common for them to get dry and fail. Also rotate the crank by hand using the clutch. Hopefully it's nice and smooth.

 

[mark]

noise

Thanks!

 

[mark]

noise

We found the left side jackshaft bearing went bad... Good ole CHEAP china made bearing. Good choice Polaris!!!