Took my rc390 down to be dynotuned yesterday. My bike is pretty much stock. K&N filter with the lid off. It ended up with 41.5hp and a really nice curve. I rode it about 120 miles this morning and couldn't be happier.
Significant difference in the mid range!
The biggest thing I noticed was...
Installed the stainless lines bypassing the ABS. Haven't ridden it yet but the lever feels worlds better. I can't even pull the lever all the way back to the bar. This should allow one finger braking. There are a LOT of fasteners on this bike. Total time to take everything apart, remove ABS...