O.K., I've done the BK mod where spray just misses the slide and squirt duration is at about .4 to .5 seconds. Bike responds better over all, but I still get that annoying off idle hesitation when I wick the throttle. Gas is Sunoco 94, jetting is stock with exception of 168 main. As the temperature gets colder my bike begins to pop when I decelerate. Is the popping a sign of lean or rich jetting ?? What circuit causes the popping during deceleration ?? I'm in Pennsylvania at approximately 850 feet above sea level. Would anyone who has done the BK mod with great success care to share there corresponding jetting changes if you are close to the same elevation as I ? If I've done the accelerator pump mod correctly and I've still got the off idle hesiation, what is causing this problem. Is this caused by the jetting being to lean or too rich, and what circuit would most likely clean this problem up . . . Pilot or Needle ?