ive got a new lz 400 i had an issue reoccur a few times now. I'll get to riding  and it does fine, but after a while it will suddenly bog down like there is no gas getting to the carb. i let it sit for a few minutes crank it back up and ride. Shortly after i get it running again it wants to do the same thing.... Any advise?  

2008 model?

normally the simplest cause for this is that there is trash in either the tank or the carburetor.

could be though that you have something in the tank from the dealer.

i would drain the tank and check for any debris.

is it still under warranty? if so i would take it back to them and let them figure it out for ya.