I have an 04 749 that I picked up a few months back as a salvage and rebuilt. I've been using it as a commuter for the last three weeks with no issues. Took it to the track this weekend and within 3 laps it was blowing oil something awful! Got it home cleaned it up, got it good and hot and no oil leaking anywhere. Put it back on the stand left it alone, next morning about an 6" circle of oil was under the bike below the airbox vent hose. Why would it not blow oil riding it as my commuter and puke at the track like this?