Not really, but while reading your jetting Q's (for about the 4th time now) I decided to grind the throttle stop down. While I had the carb out I saw easy access to the MJ. You know where I'm going next. I checked the plug. It was just sooty black like my chimney. So I'm thinking mmmhhmmmm time to go lean. And it was nice of Yamaha to send a 160 MJ with the purchase of the new bike After installing the 160MJ (down from 165) It was so much stronger over the entire power band. I say from about 1/4 up was just awesome and off idle to 1/4 was a little better than stock. However the Idle is high then it will go low(sometimes) Idle screw doesn't really help because turning it down causes the pulsing to get worse and then will die. Also Cold Start was EZ before - Choke and 2 squirts of APJ and maybe 2 -3 kicks would lite her up. Hot starts were terrible though. Now the Choke doesn't seem to effect it at all. To start now - leave throttle alone except to prime with APJ. It was always fire up very briefly the first kick, but if you twist throttle past idle it dies instantly. About 6 or 7 instances like this and it will idle but don't touch the throttle for about 20 seconds or it'll die instantly. After idling 20 seconds drive around for about 5 min she'll sputter around a little (a lot like a cold 2 stroker) and then be ok. Also hot starts are 1st kick now. Should I raise the needle a little? I haven't checked the plug today but will tomorrow as i'm tired from the track tonite The rest of the carb is stock like my signature shows. I do think it could stand some inmprovement on the low end too. Taffy? Mark?, JD?, Hick? Anyone else feel like chiming in? Thanks guys.