Hi. I just bought a second hand blaster which has been overhauled etc. It has no mods except a fmf silencer, not a full system. Sometimes when I start the bike it idles very strange like very slow ding ding ding and when I touch the throttle it makes a deep sound like coming from the airbox sounds like it wants to choke...then when I put it in gear it will move but when I touch the throttle it bogs again. Then sometimes it gets right by itself and then zero problems till I shut it off and start it the next day. Can it be a dirty carb or something? I noticed fuel coming from the overflow as well until I ride it a minute or 2 then theres no overflow. Thanks in advance. :-/