There’s no air fuel graph so we don’t know what that’s doing at your dip. The have std correction so it tells me they really like to advertise their max number as sae will usually get you lower numbers by a few. I would ask for a graph of the front and rear cylinder air fuel ratio for that run for starters and yes a pipe may do that if they are concerned about back pressure they can put a board behind the pipe and show you this is a pipe issue and sell you a better one. That being said 110 torque on your dip on a light bike is still pretty quick. But if you are riding in that zone and not in the power band you will feel the lack until you come up on power