I just replaced m yspark plug and changed from 25:1 and 32:1. My bike rides like it's choked a little bit and won't get above 22 or so (maxes around 30). I took the intake filter off and it rides beautifully without the filter. Cleaned it, put it back on, rides like it's choked. I know little about carbs. But it sounds like I need to open it up and adjust the needle or float or whatever that is. Does anybody have a tutorial for something like this? Sounds common and I couldn't find one. Unless you think there's a different problem.