I have a Bayou 250. The manual references oil changes every 90 days of use after the initial oil change at the 10 hour interval. I am used to monitoring engine oil changes based on hours of run time (similar to what is done with a tractor).

What is a good recommendation with respect to hours of engine run time before changing the oil in the Bayou 250?

 

I usually change oil and filter around 10-15 hours of ride time. I'm sure there others out there.

 

It all depends how much you ride, i ride a lot so there for i have to change my oil more often than 90 days, but yeah i usually do it like every 15 hours i think that 10 hours or less is over kill, but your quad doesn't mine only your wallet does. But your first service like changing your oil and oil filter should be after you break it in which is 10 hours.