hi guys i have a yx160 with tb race head,,i know oil capacity is around 750ml oil ,,,but with oil cooler how much oil should we use ??? i always used those cheap ones....but if we do the math it uses some oil to feal up the hoses and the oil cooler,,,and it seems that when you stop engine most of the oil runs down to engine,,,so it leads me to question if im running with enough oil....