Just put new rings and piston in awhile back and was hoping to significantly cut back on leaking out the vent tube. I've always had what I thought was to much leakage so when I finally started to lose a little power I did the top end rebuild witha Weisco kit. The old rings were 2-3 thousands over max spec and piston and everything looked good. New rings measured within 1 thousand of minimum spec so I should be good and tight. I've now got about 9 hours on the motor so I should be broke in and seated good. Now I know these measurements I'm about to give aren't specific but please bear with me. After a hard ride, when I park the bike behind the truck, take all the riding gear off, [@#$%&*!] with the guys and drink a beer, I then go to load the bike and always see a oil stain on the asphalt about 5 inches in diameter under the crank vent tube. Then when I get home 90 minutes later, I've got a similar stain in my truck bed. If I didn't park a crappy piece of carpet under the bike I'm sure my garage floor would be stained too. Now I haven't yet measured how much oil I have to add to get back to level because I've still been draining the oil after every ride during the break in and it's worthless to try and measure what you drain out of the bike since some of it goes on the floor, frame, arms, shoes ........ Doesn't this seem a little excessive to some of you guys? I'd sure like someone else's opinion and while you're at it, do you think I've got enough hours on the motor now to go back to Mobile 1 synthetic?