Help , bought a u-beaut bobber style CX500 . After complete engine rebuild with ignitech ignition. It has a nasty misfire when hot (after about 30 min of riding ) Where do I start?

Hey guys and gals Brand new here, and not very skilled with forums in general but I have a few questions about customization to my bike as well as repairs First thing I guess I should say is that this is my first bike ever. The main thing with the bike is that it won't rev over 6k It runs like...