iv got a 2000 yz 125 and iv never had a problem with it. but now when i put new oil in it and than i race for a day the oil turns gray and sometimes white also my bike gets no compretion but it runs great. but im more worried about the oil and iono whats happening
I know whats wrong with your bike
YOu say your bike has grey to white oil. That is water leaking into the gearbox. I've got an old 83 CR 125 that is a great bike it's just the drain plug rattled out and white oil leaked out. I opened up the waterpump and checked the seal that seals the water from going into the gearbox where the water impeller shaft goes through and saw it was shot. Check it out on your bike. That is probably the problem. We live in Africa so it's hard to find parts but hopefully I'll get one out here.