Hello, new to the forum. I have a gy6 swap that I just recently finished on my ruckus but I keep having issues with it idling. I have messed with the mixture screw and idle screw and have gotten to the point that I can ride it but when I come to a stop it either shuts off or almost does. If it does shut off I am able to start it right back up though. Today it seemed like I had it idling normal but the rpms seemed high. I don't have a tach right now but I am not sure if the gy6 just idles at a high rpm or not. One last thing when I do shut off the ruckus white smoke comes from the tailpipe every time, is this an issue? Any help would be appreciated!! Thanks!

 

Some things to check:
Make sure you don't have a vacuum leak at the intake manifold. I would recommend swapping the cheap intake with a metal one. Also, if you had to raise/angle your carb for clearance, use gaskets to help stop leaks.
Make sure you have the correct jets installed in your carb. Might need to change the jets if you upgraded the exhaust or air filter.

 

Hi there. I'm new here and I just read your post. I JUST fixed this problem on my GY6 swap as well. What I had to do was move the shim on my carb needle all the way to the lowest position and it fixed everything. Hopefully this doesn't come too late and you're able to put the info to use.