Originally Posted by anaconda moto
So if i am looking for something that pulls a bit more,
i better go for a 250cc with 4 speed, or is the answer not that simple?
Well now, it gets more complex - there is the issue of the state of tune of the engine which determines the output of not just horse power but torque; to "pull" with good acceleration you need torque, and HP is of much less interest at that time when you need to accelerate.
Engines are designed to develop maximum amounts of HP and torque at various revolutions of the engine depending on the expected use of the bike - racing, touring, or whatever.
Even changing tyre sizes will affect the gear ratios to some degree.
The best option is definitely to test ride any particular bike of interest while bearing in mind the variables mentioned so far.