Your more than welcome.
Maluzkat notice the info by the members with more experience, or the number of posts. 2Door and Spad4me. I'd listen to them.
I would not start throwing money at the engine hoping for a fix.
First there is no need to run premium gas, these engines are low compression. Regular fuel is better.
Most instructions tell you to use 16 to 1 fuel mix. I've found using 32 to 1 mix is better, after break in I use 40 to 1 using syn. 2 stroke oil.
If you have leaks on the intake tract, crank case seals, cylinder base gasket, or the split line on the crank case, that will change the fuel to air mix. It will make your engine very hard to tune.
The stock spark plug will work fine if it is not oil fowled, I use less gap 0.017 to 0.020"
You might want to check the carb's main jet find out what dia. the hole is drilled. To measure the jet you will need a set of micro drills and a micrometer. If you live above 3000' then you may want to decrease the main jet size. there is info on this forum about that. usually the stock jet size is 0.070mm the next leaner size will be 0.065mm
Some of these carb's needle is machined wrong on the taper. they will idle fine but will to rev up. Ask Palbo(one of the guys from sick boys parts) he had one. That repair was simple using a micrometer (to measure the taper) with the needle chucked in a dremel tool and 600 grit wet/dry sand paper I don't recommend doing this as it takes only about 0.002" to make a big change in the amount of more fuel that it will deliver, you need to work with a known good working needle for getting the proper measurements.
Most of these engine will work good using the #2 E- clip slot on the needle counting is from the bottom of the needle/ pointed end , If the E-clip is in the top slot then that is the leanest setting for the needle.
The fuel air ratio is effected by the needle up to 3/4 throttle, at wide open the fuel air mix is controlled by the main jet.
For a new engine they will a lot of times run crumby until broken in even worse if there is air leaks or if there is a fuel mix of 16 to 1 used, along with a wide spark plug gap of 0.028"
An inline paper fuel filter is a must, the tanks will have very fine particles of trash in them and these particles will cause problems.
Get the intake tract sealed.
Make sure the carb is assembled correctly and that the choke is not accidentally going to the choke position.
Take off the air cleaner looking in at the carbs throttle slide make sure it goes all the way up and closed.
You can also clean the foam air cleaner in warn water using a drop of dish soap, get all the oil and dirt out of it. Then either let it air dry or you can wring it out in a couple of paper towels install the filter without oiling it. Start it up and ride it for 30 minutes or so. The filter will oil itself due to the way these engines puke fuel/oil out of the carb every time the engine makes a revolution.