Banshee_Killer said:i meant in the neighborhood of oil changing etc. its the same as a quad right.
every 20 hours or so?
Every 20 hours is closer the recommended piston/ring replacement interval. You might want to think about changing the oil a little more often.;)
A good place to start is the Service Interval chart in the factory service manual. Below is an example from the 2005 YZ250 manual.