So I have a ping usually in 4-5 gear and starts low in the rpms (as soon as I get in the gear). When I first got the bike it didn't seem to do it, I'm thinking maybe carbon buildup? I have tried all kind of different fuel, and I just added some techron to the tank last weekend, going to try to run a couple tanks through it with the additive. It's a 2005 hammer all stock except swept pipes. Anyone have any insight?