I had a new Harley Davidson tire put on my bike late summer (front tire). Has about 2000 miles on it. Noticed around 1000 miles - that it was losing air. Dropped from 32lbs down to 19 - after a few hour ride one day. Put air back in it. Checked with sudsy water for any leakage - none. Especially around valve stem. Nothing. No holes that I can see or that bubbles would indicate. Leave it sit - during dramatic temperature changes. No leakage. Ride it one day - no leakage. Next day - loses 5-10lbs while riding it. Always while riding it. Never sitting - or - over night with temps here in MO jumping from 60 down to 20 in one day. So it has some load bearing issue. Dealer here suc*s. If I take it to them they will keep it for 3 weeks or until you call and remind them they have it. Any ideas what it may be?