the hesitation and bog you are referring to is from the LSN being too lean or rich. If it's blowing a ton of smoke and blubbering it's too rich, if there's no smoke and it sounds really quiet like it wants to cut off, it's too lean. When just starting out it's difficult I know, but try and learn to tune based on your needs rather than stock settings or someone else settings. Climate, humidity, plug, track, etc... will make a huge difference in needle settings. My needle settings today may not be my needle settings next weekend.