So how often are you suppose to change the oil filter?
Might want to give the old manual another once over. The break in period is 20 hours, change the oil every 100hrs after that, as per the service manual.I always change my oil and filter on both my quads (02 300ex/92 250 mojave) at the very recommended 10 hours.
Every dealer I've ever asked always says clean the filter, and change the oil/filter after 10 hours of riding. And then check valves after 20 hours of riding.
And most books I've read agree with the dealer that oil/filter should be changed after 10 hours.
I'd rather be safe, then wear the bearings out and have to rebuild the motor. $25-$30 bucks in oil/filter, or $1000-$1800 to rebuild motor.