I'm getting there with my Shuttle. I have replaced SO many parts and my current holdup is getting spark. After discovering I wasn't, I tested all electrical components per the FSM and the CDI and coil both tested bad. I have parts coming from eBay and I hope to get them swapped out in the next few days.
I do have a question on jetting...this is my setup.
60cc kit and stock clone carb from Treats
MLM next level stock pipe
stock intake and reeds
Does an 82 main jet sound like the right size for this? That gives me a 6% increase. I will get some pics up soon to show where I'm at.