I notice you say carb kit, I am not aware of a Mikune carb kit, just Shambits and Shyster (or Yambits and Keyster to give them their real name) you said ealier that you were waiting for new Mikuni brass bits, have you fitted new gen Mikuni brass bits, or is it on another make carb kit, as has been said on this thread, they are not correct and the bike won't run right without gen Mikuni brass bits, there are many many threads on here about people fitting after market kits and then the bike won't run correctly.