Do we all think it's O.K. to pay 500 Hundred Beans and get modified Hotdog!!!!!
I hate this phrase but here goes... "It is what it is"
If you leave the bike stock it will run fine BUT it is not designed to run at slow speeds at low RPMs so it's gonna chug.
If you want to leave the ecu, pipes, and intake stock and you want to get rid of the chug then get a stock fwd pulley for the V Star 1300 which happens to be a 30 tooth versus the 31 tooth that came stock with your Stryker for @ $140 to $180. Chug Mostly
If you want performance get the pipes of your choice, I see you choose Cobra dragsters... I'm not familiar with the dragsters so I don't know if they have a cross-over like my Cobra swept pipes.
Without the cross-over you will lose some low end torque and it's harder to make the Cobra Fi2000 work perfectly without some tuning, not sure why but it doesn't seem to like the Vance and Hines pipes for that reason. all of a sudden you notice the hesitation is evident and the chugging is more noticeable because you're running a bit more of a Thoroughbred and the amplified pipes make it more noticeable now.
If you add a Big Air Kit (I see you did with the Power flo, same as me) then you now HAVE to install the Fuel Programmer, I also have the F12000.
Now the chugging is back a little more noticeably and you may end up with a "Sneeze" or hiccup at freeway speed while holding your momentum but slightly rolling on the throttle...
NOW... Unplug the dam O2 sensor and almost all of it magically goes away to the point where you don't give it another thought.
The only difference between your set-up and mine is you have the dragsters and I have the swepts.
Mine, with the O2 unplugged runs AWESOME.
Not sure about your hot dog though???