I am at a loss for a corrective action. I have a 2003 YZ450 that I use for road racing ie supermotard. The existing crankcase breather vents to atmosphere via a 1/2" hose. Obviously this is unacceptabe in a track day environment. I have tried crankcase catch cans, breather filters, all unsuccessful due to the crankcase must vent. I usually wind up with oil all over the chassis after the filter or catch reaches saturation. Does any one know of a fix? or do I need to turn it back into a dirt bike.