However for people like me, who have read and reread jetting threads, but still am clueless how to tune carbs,...  it sounds like an easy way around the jetting issue. I can turn a wrench just like the next guy but it is hard for me to understand the way carburetors are adjusted and how to figure out what adjustments to make when I'm out riding. If that carb can adjust itself, I may think about getting one for my 250 for shear convenience once I start rebuilding it. Post up a pic please.