Welcome and congrats
She looks really clean, nice find on the bike
Like memphis said, sprocket looks good - teeth aren't hooked, etc. Just make sure the retaining circlip is snug and in the groove, appears to be from your pics, but always good to check.
I'm not sure what those lines are, but they were on my stock sprocket too.
Good luck with the headlight and Trail Tech. I don't know if the Endurance relies on bike power or if it's battery; if you're going to wire into the bike power, make sure there's some type of regulator (I think) inline - fried my original Voyager when it was wired directly
Be sure to post up a ride report after you get her out too
