Initial "Break-in" service for 157QMJ, seeking wisdom and recommendations.

[seafer]

I purchased a Cougar Vogue 150 off the showroom of the dealership I work at on Saturday and I've done nothing to it but clamp a milk crate to the rear rack and put 176 miles on the clock. This is my only vehicle and will be for the foreseeable future. And because of that I'd like to do my utmost to ensure it's well taken care of. Soon the clock will strike 300 miles and since purchase and until then I've been slow on the acceleration and not letting it go past speedo indicated 45 mph. Once I reach that milestone I intend to perform a full service on the bike and I'm making this post to ask for recommendations on what I should look for besides my usual routine. Here's everything I currently plan on doing:
>Changing the oil for 26oz of 10w40 full synthetic
>Changing the spark plug out for a high quality NGK branded one
>Replacing the oil in the reduction gear with full synthetic 80w90 gear oil
>Adjusting the valve shims to 0.05 on both intake and exhaust sides
>Tightening down the exhaust bolts and four cylinder stud nuts a quarter turn
>Adjusting the throttle cable (it's so lose i think I'm only getting 80% of the throttle)
>Richening the fuel mixture a quarter turn
Beyond these things, are there any other standard procedures you guys like to undergo when assembling a bike or doing your first service? Also, here's a picture of the machine on her first outing getting groceries for the month. Her name is Cuurian.