Cam/valve lash?

[Bozo]

Turbo, don't fall for the trap thinking that these cams are weaker under 4,000rpm like I did. the better top end makes it seem like its weaker but thats not always so. Compare it to another similar bikes. If your cams are dialled in correctly keep going with the carby tune. Roberts advice is good. Don't forget just because my carbies work well on my bike it might not work well on yours.
Good luck

[JMR]

  Hoping to get some of the lost low end pull back with some tuning and not get into the cam swap...also,maybe move the exh cam back a little. Thanks

Pulling the exhaust cam back will help as charge is going out the exhaust at overlap with higher lobe centers.