What kind of oil do I use on my Honda crf250r?

Also how often should I change the oil?

I use my bike for trails and casual riding. (I don't race)

PS: I bought Honda 10w 40 non synthetic oil is that good enough?What kind of oil do I use on my Honda crf250r?100-140 hrs????

try 10-15

oils cheap

motor arentWhat kind of oil do I use on my Honda crf250r?golden spectro has always been my favorite brand , but for trail riding the honda synth. is more than enough. in racing the oil is changed after Every heat. trail riders will want to change at about 100-140 hrs.