Hey guys, its my first post so give me some leeway. I have been slowly building up mine for a few years. It has a Mikuni carb, a reed valve kit, expansion chamber, 32 tooth sprocket (soon to be 36). Right now my exhaust is loud and has the 2 stroke rumble. When I rev it up I can feel the air pulling through the filter but I can hear what it sounds like sucking air from the intake. Its quite loud and annoying.