When I bought my X the previous owner had a custom air box and re-jetted the carb. I wanted it all stock so I made the necessary needle change etc. I just learned that part of that Dyna install is drilling a hole in the slide. I've read some kits require it some don't. What does the OEM, untouched slide look like. Is there already a hole in it so the Dyna hole would make two? Or is it solid and a single hole would indicate a drilled hole? If there is a drilled hole I have to suspect there would be a performance issue of some kind going back to the OEM needle. And then there's the fix if it has been drilled. I suspect a new expensive slide. Next time I have the tank off, I'll have to open the top and see if there's damage. Thanks!