Howdy, I just moved from a '14 Raga 300 to a 125 :). Something about me likes small bore engines - how they run smoother, less lumpy, quieter etc. I ride Advanced and haven't competed yet but from what I can tell I don't think it'll be a disadvantage, and bike is really fun to ride. I was always too scared to hold the 300 wide open for a clutch dump but the 125 is making me feel braver. I've done a few, a wow, it really makes the bike fly up obstacles! I had my first taste on a Schoolboy 125 a friend bought for his wife and I fell in love with it. Anyway... bike came to me with a Dellorto. Owner put one in at the recommendation of the good folks at Lewisport as he was have a bogging issue with the Keihin that they couldn't fix. I should point out that when I got the bike the air filter was dripping with oil, not sure if that may have played a part. Bike had a 50 pilot jet and 118 Main. Does not run as cleanly off the bottom as my friend's Schoolboy with the Keihin. The fuel screw was best at 1.5 turns out, apparently they are supposed to be 3.5 turns out to be optimal. I just put in a 45 and it was better. Any jetting suggestions out there? I'm in San Diego, it's 80 degrees, sea level. I noticed with the fuel screw that the more you wind it in (leaner) the revs will eventually start to climb. Do I go out a way, then go in until this starts to happen, and that's the magic spot?