First?- Does anybody know of a company that makes an aftermarket oil cooler for late model YZ450f's (2007 specifically)? Second- Does anybody know what exactly the flexible oil line does that runs from the top of the case (the line that comes out right next to the oil dipstick) then runs to the right side of the bike and reattaches to below the oil filter cover? I ask this question because I heard that this line is some sort of overflow line and if I built an oil cooler to insert in this line, that since it is an overflow line that there wouldn't be enough pressure to circulate any oil through this line, hench no benefit of an oil cooler placed there. Let me know what ya, know! Thanks for your time!