In hindsight, I'd recommend that you do the spline lube, or have it done shortly unless you have
records of it being done recently by the previous owner. My 82 LS only had 14,500 miles on it
when I bought it, but it had been in seemingly damp storage for at least 12 years. I figured that
I could ride it a thousand miles or so until putting it up for the winter to do the spline lube, as
I had spent alot of time already rebuilding the brakes, forks, shocks, replacing throttle, clutch, and choke cables,
adjusting carbs, and replacing all the fluids and filters, and battery. Wrong !!! I now seem to have alot of rust colored
dust in the bottom of the clutch/flywheel housing that is very magnetic in nature, and the bike will not
move anywhere... At least this happened while riding near home, and I only had to push her 2 miles..
I'm hoping that it was just the clutch disk splines that went - have to pull her apart once the weather warms up at
little, as my garage isn't that well heated and it's well below 0 (fahrenheit) right now !!!

Oh, and welcome to the forum !!!
You'll find that there are many helpful people here who love their little boxers, and there are a number of LS owners, too !