I have a 65 Metra kit and a big Mikuni 19 or 20 I think. When I get the bike started it runs great but at full throttle bogs down. It prefers about half throttle where it really rips. It also is a bitch to start, but when it gets going it's fine. A new spark will make it start up no problem, and it generally does seem dirty (leading me to think rich) but I'm also thinking it might be lean causing it to not want to start and be a wuss at full throttle. Any thoughts and opinions would be greatly appreciated.