9 years ago a dismantled my baby because she was falling on her face at low r.p.m.'s. After taking it apart and discovering 3 bent valves (likely caused by the frozen cam chain adjuster and a mis-shift and high rev). The valves are replaced, head ground and lapped, clearances are all in spec.. bs34 carbs have been dismantled, cleaned, carb kits installed. The bike will not run. Before installing the new kits, I managed to get it running on 3 of 4 banks. (1,2,4) Because of this, I pulled the carbs, cleaned again, put in fresh carb kits and re-installed on the bike. She will not run at all now? I've got spark at all 4 plugs...and I'm at a loss now. I believe the pick-up is working, the IC ignitor is working, and the coils seem to be working....but can't be sure it's all up to par. My friend suspects it's still a carb issue, but I have a hard time with that considering they are pretty darn clean! Please help. I want to ride my old girl again!