Hello all, I'm a newbie to this site and just started modifying my '05 S40.  Over the weekend I installed a 152.5 main jet and a 55 pilot jet as recommended.  I also filed the white spacer down to half it's original size and reinstalled it.  I have a HD Dyna pipe waiting to be installed but I wanted to make sure the darn thing would start after pulling it apart.  It does start and run but won't idle.  I'm assuming that before I begin troubleshooting all the other recommendations I found on this terrific site, I should drill out and adjust the idle mixture screw.  My question is - where is it located?  I looked on the right side of my carb but did not find a white mark.  The only picture that I found on this site is not showing on my computer (just the infamous red X).  Can anyone please post a picture locating the screw along with any instructions for drilling it out?  Thanks for all your help.  

Thanks for the link.  The jets came as a kit and I thought I might as well install both while I had everything apart.  The original main jet was a 145 and the bike backfired constantly.  I'm in New England with lots of big hills so I got tired of announcing myself on every descent.  If it's running too rich and sooting up, I'll put the original back in and see how that goes.  I'm already realizing that I need to be patient to get it running perfect.