I do not remember seeing the motorcycle dripping gas when parked...but who knows...I have a Harley Davidson parked next to it.
Happens only when choked. But I have the carb off the bike and will take a look. Looks like it is hard to get resources on that particular bike.
While we are at it, before I parked it for good for repair/restore, it developed a diesel noise. No loss of power though. Thought it was cam chain, but it looks good. Thought it was the starter chain, but that looks ok as well - there is some slop to it, but measures up as per the specs in the manual. So now taking the top end off and just going to put some fresh gasket and stuff, blow out oil passage and what not.