I just removed all the internal guts on the check valve and the internals on the end of the hose that goes to the injectors. Never will my 08 sportster strand me, or not start like it had done several times. Took me some time and money to figure that was the problem. New fuel pump and pressure regulator, they weren't the problem. Stupid ass rubber o ring, mine was the bottom one in the check valve, it didn't leak, just not start. The other o ring you will have to replace, that is what seals the connection. The thinner one, the upper one. That is your problem with leaking.

It Looks like it!!!!

Common problem, the o-rings dry out most likely or they can get out of place. Like 5 bucks in o-rings max or a rebuild kit like 15 bucks. Super easy to redo