Because I cut out the side panel covering the air filter, I had to re-jet. Now, the mixture adjustment screw has to be set at 3 1/2 turns out with a 68S, (seems like the screw could be too loose and eventually fall out). I have tried a 70S, and it works great at 1 turn out. The only issue with that is, I don't have much adjustment room to go leaner when I get higher in altitude. Keep in mind, the adjustments amounts are max values for my lowest riding elevation. I live in CO, so as I go up, I have to adjust the bike leaner. What would you use? Is it okay to run the mixture screw at 3 1/2 turns out with the 68S? Would it be worth trying a regular 70 pilot jet? I've heard I'll lose some of the low end "hit" if I use a non "S" pilot jet.