clattering

Just tonight, I romped on the bike and in the lower RPMS (up to about 5000 RPMS) the slides were clattering considerably. hasn't done it before. did it twice tonight. Is that a sign of anything in particular. I'm kinda chalking it up to the temps bumping 90 and humid. I havent changed anything...

About a month ago I tried to fire the Max up and it made a real loud popping noise through the carbs and it fouled the plugs. I changed the plugs and got it to fire up but I could hear the valves clattering. I took it to the dealer and had the carbs synched but the valves still clatter but it...