OK. Went for 7 hr ride back in September with a buddy of mine. Started out gray skies and ended up riding in the rain for about 30 to 40 miles. Got home and parked it. Got up the next day to go riding. Looked at sight glass to check oil level. And it was milky yellow looking. Did some poking around online. Was either moisture in the oil. Or coolent. Ran it thinking it would burn off the moisture to no avail. Ordered new gasket. Drained oil. Cleaned the sight glass and housing. Reinstalled it. New oil and filter. 200 mile ride. Yellow crap in sight glass again. Looked at overflow. And it's low. My question is. Can I replace the head gasket, cause I'm sure that's what is now. Without pulling the motor? 91 zx7r.