Hmm welcome, glad to have you.
Roadsters do indeed come about 5-10 HP behind the originals, but, it's a free ECU flash from full power (and then some).
Penners tune is a great one for a stock bike, check the resources section on the top bar.
Stalling before the first service is common, it's a dead give away the dealer didn't calibrate the TPS correctly, which is a 1st service item.
The bikes governed to I think 125 with the stock tune. Penners will let you go 186mph if you've the power to get there