Your question is hard to answer.
It depends. How's that?
The weights really depend on your weight, do you have a lot of hills or live in a flat area
and what do you value, acceleration or top speed?
That said, try ordering a set of 6 gram and a set of 5 gram weights. try them on their own and mixing them together.
jetting is the same way. Some guys have a 101, some are in the 90's, some of us are still on stock jets. need to play around with it for a while.
as for that kit...
I don't know. I like to buy name brand from an actual store so I know I'm getting great service.
Try Enviromoto, scootertronics, provoscooter... and call them. They always return my calls and answer my questions.
good luck and post your results.