can you guys help me. i was having a bit of a popping issue that i could here out the exhaust. well i synced number 3 and number 4 to number two. and now ive notice the popping is louder and only coming out of the left exhaust? any ideas. note i havent been able to do number 1 it got dark out. it also seems to get worse as the bike warms up. also very noticable when im coming up to a stop and engine breaking. its driving me nuts:crazy:. help any one?