Hi all I have a 2007 xr650l it has about 1005 miles on it my ? is is an oil cooler a must have thing or not? And will i hurt this bike being as it is aircooled by rideing say 30-70 mile trips on the highway with it? just looking for a bit of info any and all would be nice. Thanks for everyones time also. And also I better add that I have rejeted it with a Dyno jet kit runing the 160 main jet. I did here that rejeting would help it run cooler.