As long as it isn't sticking, no. Pretty sure mine has similar marks as have others I have seen pictured here. Most important thing is to make sure you put it all back in clean with no fingerprints on the slide or carb, so there isn't a place for debris to start attracting and sticking to and leading to a sticky slide.

And while you are in that deep, I presume you have seen the threads in the tech section regarding carb tuning, more specifically jetting, air mix screw, and white spacer mod? Jetting may or may not be needed, but these bikes are lean from the factory and those three items will make an angry running bike run smooth and top notch.