The only reason you need a resistor is for turn signals because of the flasher relay circuit. Because an LED uses such low power it is similar to a blown bulb - which gives you the fast flash.
I think the reason for the bike off is to get an idea of rotation without accelerating around town. Your way is more fun!
I have aftermarket grips on my bike and they hang up a bit so I added a couple washers on the bar end to move it out. It was much more noticeable getting off the throttle versus on.