Did you add all the extra components yourself? It is best practice not to change or add too many performance mods at a time.
With a 2020 Ruckus you will not need the shim.
Are you using the TRS TVR intake as it is sold or have you shortened the runner? If you are using the intake just as they sell it like this:
you will most like have better luck with a larger main jet like a 80 or even an 82. You should try both and record your results.
Also when tuning set your goal RPM to be no more than 9600. Try to get up to 8000 as fast as possible and stay between 8000 and 9600 for as long as possible. If you don’t wight more than 220lbs, you should be able to hit 48 to 50 mph on flats without going over 9600.
Long story short a lot of tuning is just testing and experimenting with different combinations.
Here is a link to the tuning journal that I use.