has the tire ever had sealant in it?

if not, if it were me, i wouldn't spend time trying to find a leak that may or may not have a cause that i didn't or couldn't fix even if i did figure it out. i would just ride it, if it would hold air, until it became more trouble than it was worth.

as it stands i have a similar tire problem. on one of my bikes the front tire deflates about 10 times quicker than the rear one. for now it just means that i have to pump a few more times to inflate the front tire before a ride. i don't plan on finding the problem ever, although by happenstance i may.